What are the cheapest airlines to fly from Region of Ontario to London one-way?

For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 337. Users have also found prices from C$ 388 and C$ 435 on Porter Airlines and TAP AIR PORTUGAL, respectively.

What are the most popular routes from Region of Ontario to London?

The most popular flight routes from Region of Ontario to London are Toronto Pearson Intl - London Heathrow, Toronto Pearson Intl - London Gatwick and Montreal Pierre Elliott Trudeau Intl - London Heathrow.

What are the cheapest flights from Region of Ontario to London?

On average you can expect to pay C$ 1,861 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 488 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 625.

What are the most reliable airlines from Region of Ontario to London?

Consider Ethiopian Air (88%), Egyptair (78%) or American Airlines (76%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to London.

What are the most popular airlines that fly from Region of Ontario to London?

When booking a flight from Region of Ontario to London, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

How far in advance should I book a flight from Region of Ontario to London?

Travellers have found it’s best to book a flight 50 days in advance to save up to 24% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 50 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Region of Ontario to London 1-2 weeks in advance for as low as C$ 855, or C$ 1,102 for flights within the next 24 hours.

What is the cheapest month to fly from Region of Ontario to London?

February can be a great time to fly to London from Region of Ontario with a flight ticket averaging about C$ 858. Cheapflights users have found deals in the month of February for as cheap as C$ 527. The most expensive prices can be found in the month of December.

Can I find deals for flights from Ontario to London that include hotel bookings?

Yes. In addition to deals on Ontario to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.

Can I find deals for business class flights from Ontario to London?

Yes. Cheapflights offers flight deals from Ontario to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 287+ Flights from Ontario to London

Cheap flight deals from Ontario to London

Round-trip from	C$ 664
One-way from	C$ 336
Popular in	December
Cheapest in	February
Average price	C$ 771
Good round-trip deal	C$ 677 or less
Good one-way deal	C$ 384 or less

Air Canada
9/5-14/5
3 total stops
27h 15m total
Ontario to London

Search Deals

26/5
2 total stops
18h 10m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (C$ 31 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Ontario to London (LON).

Search Deals

Price to beat on a one-way flight from Ontario to London (LON).

Search Deals

Find flight deals from Ontario to London

Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Fri 9/512:25 p.m.YTZ - LHR

1 stop13h 05mAir Canada

Wed 14/58:40 a.m.LHR - YTZ

2 stops14h 10mAir Canada

Deal found 17/4C$ 664

Thu 8/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4C$ 664

Fri 23/510:10 p.m.YYZ - STN

1 stop11h 10mMultiple Airlines

Fri 20/610:50 p.m.STN - YYZ

2 stops26h 11mMultiple Airlines

Deal found 17/4C$ 664

Sun 1/611:00 p.m.YYZ - LHR

1 stop31h 55mIcelandair

Sun 15/69:25 p.m.LHR - YYZ

1 stop29h 30mIcelandair

Deal found 17/4C$ 667

Thu 1/56:20 p.m.YYZ - LHR

Nonstop7h 15mAir Canada

Tue 6/58:45 a.m.LHR - YYZ

1 stop12h 40mAir Canada

Deal found 17/4C$ 668

Mon 2/611:00 p.m.YYZ - LGW

1 stop10h 35mIcelandair

Sat 7/63:40 p.m.LGW - YYZ

1 stop11h 15mIcelandair

Deal found 17/4C$ 668

Thu 8/52:45 p.m.YTZ - LGW

1 stop14h 05mPorter Airlines

Wed 14/511:35 a.m.LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 17/4C$ 674

Sat 17/510:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Sat 31/511:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 16/4C$ 674

Tue 8/79:15 p.m.YYZ - LTN

1 stop20h 10mMultiple Airlines

Thu 17/78:05 a.m.LTN - YYZ

1 stop11h 05mMultiple Airlines

Deal found 17/4C$ 679

Sat 17/511:35 p.m.YYZ - LHR

Nonstop7h 15mMultiple Airlines

Thu 29/52:05 p.m.LHR - YYZ

1 stop12h 02mMultiple Airlines

Deal found 17/4C$ 681

Fri 16/59:00 p.m.YTZ - LGW

1 stop31h 50mAir Transat

Tue 27/511:35 a.m.LGW - YTZ

1 stop15h 45mAir Transat

Deal found 16/4C$ 696

Thu 8/510:45 p.m.YYZ - LGW

Nonstop7h 00mPorter Airlines

Wed 14/511:35 a.m.LGW - YYZ

1 stop12h 33mPorter Airlines

Deal found 17/4C$ 724

Best flights from Ontario to London
Discover carefully curated flight deals from Ontario to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 April 2025.

Fri 9/512:25 p.m.YTZ - LHR

1 stop13h 05mAir Canada

Wed 14/58:40 a.m.LHR - YTZ

2 stops14h 10mAir Canada

Deal found 17/4C$ 664

Thu 8/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4C$ 664

Fri 23/510:10 p.m.YYZ - STN

1 stop11h 10mMultiple Airlines

Fri 20/610:50 p.m.STN - YYZ

2 stops26h 11mMultiple Airlines

Deal found 17/4C$ 664

Sun 1/611:00 p.m.YYZ - LHR

1 stop31h 55mIcelandair

Sun 15/69:25 p.m.LHR - YYZ

1 stop29h 30mIcelandair

Deal found 17/4C$ 667

Tue 20/56:55 p.m.YTZ - LGW

1 stop9h 55mPorter Airlines

Wed 28/511:35 a.m.LGW - YTZ

1 stop11h 35mPorter Airlines

Deal found 17/4C$ 668

Fri 6/66:05 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Fri 13/61:20 p.m.LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 17/4C$ 721

Wed 11/65:40 p.m.YYZ - LHR

1 stop14h 05mTAP AIR PORTUGAL

Sun 15/68:00 a.m.LHR - YYZ

1 stop18h 00mTAP AIR PORTUGAL

Deal found 17/4C$ 733

Fri 23/54:00 p.m.YYZ - LHR

1 stop9h 30mLufthansa

Sat 31/55:40 p.m.LHR - YYZ

1 stop30h 39mLufthansa

Deal found 17/4C$ 742

Sun 25/512:59 p.m.YYZ - LGW

1 stop13h 51mAmerican Airlines

Mon 16/63:05 p.m.LGW - YYZ

1 stop11h 25mAmerican Airlines

Deal found 16/4C$ 758

Fri 9/56:20 p.m.YYZ - LGW

1 stop10h 05mWestJet

Sun 11/510:45 a.m.LGW - YYZ

1 stop11h 06mWestJet

Deal found 17/4C$ 779

Wed 23/48:55 p.m.YYZ - LHR

1 stop29h 00mUnited Airlines

Wed 30/48:00 a.m.LHR - YYZ

2 stops14h 09mUnited Airlines

Deal found 16/4C$ 815

Tue 20/53:00 p.m.YYZ - LHR

2 stops17h 40mSWISS

Thu 5/66:00 a.m.LHR - YYZ

1 stop15h 25mSWISS

Deal found 17/4C$ 817

Direct flights from Ontario to London
Explore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2025.

Thu 8/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Wed 14/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 17/4C$ 666

Mon 22/910:45 p.m.YYZ - LGW

Nonstop7h 00mPorter Airlines

Mon 6/1012:40 p.m.LGW - YYZ

Nonstop8h 00mPorter Airlines

Deal found 17/4C$ 671

Sat 17/510:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Sat 31/511:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 16/4C$ 674

Mon 22/96:25 p.m.YYZ - LHR

Nonstop7h 10mLufthansa

Mon 6/108:30 a.m.LHR - YYZ

Nonstop7h 55mLufthansa

Deal found 17/4C$ 696

Thu 1/56:20 p.m.YYZ - LHR

Nonstop7h 15mAir Canada

Tue 6/55:40 p.m.LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 17/4C$ 715

Thu 5/66:05 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Wed 11/61:20 p.m.LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 17/4C$ 717

Sat 3/56:20 p.m.YYZ - LHR

Nonstop7h 15mMultiple Airlines

Wed 7/58:30 a.m.LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 17/4C$ 738

Fri 6/610:00 p.m.YUL - LHR

Nonstop6h 40mBritish Airways

Mon 16/66:05 p.m.LHR - YUL

Nonstop7h 10mBritish Airways

Deal found 15/4C$ 738

Tue 10/610:05 p.m.YUL - LGW

Nonstop6h 45mPorter Airlines

Tue 17/611:35 a.m.LGW - YUL

Nonstop7h 40mPorter Airlines

Deal found 17/4C$ 739

Sun 11/510:25 p.m.YUL - LHR

Nonstop6h 35mAir Canada

Fri 16/59:30 a.m.LHR - YUL

Nonstop7h 10mAir Canada

Deal found 17/4C$ 758

Thu 22/510:25 p.m.YUL - LHR

Nonstop6h 35mLufthansa

Wed 28/59:30 a.m.LHR - YUL

Nonstop7h 10mLufthansa

Deal found 16/4C$ 765

Sat 31/56:25 p.m.YYZ - LHR

Nonstop7h 10mAmerican Airlines

Fri 13/65:15 p.m.LHR - YYZ

Nonstop7h 55mAmerican Airlines

Deal found 16/4C$ 770

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 17 April 2025 and is based on user searches.

Wed 23/48:55 p.m.YYZ - LHR

1 stop29h 00mUnited Airlines

Wed 30/48:00 a.m.LHR - YYZ

2 stops14h 09mUnited Airlines

Deal found 16/4C$ 815

Thu 24/48:15 a.m.YYZ - LHR

1 stop17h 40mAir Canada

Tue 6/55:40 p.m.LHR - YYZ

Nonstop7h 50mAir Canada

Deal found 17/4C$ 788

Fri 25/410:00 p.m.YYZ - LHR

Nonstop7h 15mBritish Airways

Thu 8/55:20 p.m.LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 17/4C$ 775

Fri 25/43:00 p.m.YYZ - LHR

1 stop10h 45mMultiple Airlines

Sat 10/58:05 p.m.LHR - YYZ

1 stop25h 20mMultiple Airlines

Deal found 17/4C$ 810

Fri 25/47:15 p.m.YYZ - LHR

1 stop12h 15mFinnair

Wed 30/411:00 a.m.LHR - YYZ

1 stop12h 30mFinnair

Deal found 17/4C$ 819

Sat 26/46:25 p.m.YYZ - LHR

Nonstop7h 10mAmerican Airlines

Fri 2/55:15 p.m.LHR - YYZ

Nonstop7h 55mAmerican Airlines

Deal found 17/4C$ 771

Wed 30/44:20 p.m.YTZ - LHR

1 stop11h 15mAir Canada

Thu 8/59:30 a.m.LHR - YTZ

1 stop10h 20mAir Canada

Deal found 16/4C$ 711

Wed 30/49:30 p.m.YTZ - LGW

1 stop31h 20mAir Transat

Wed 14/511:35 a.m.LGW - YTZ

1 stop25h 50mAir Transat

Deal found 16/4C$ 715

Wed 30/49:30 p.m.YTZ - LGW

1 stop31h 20mPorter Airlines

Wed 18/611:35 a.m.LGW - YTZ

1 stop13h 25mPorter Airlines

Deal found 16/4C$ 722

Wed 30/47:15 a.m.YYZ - LGW

1 stop19h 55mAmerican Airlines

Sun 4/52:45 p.m.LGW - YYZ

1 stop24h 30mAmerican Airlines

Deal found 16/4C$ 765

Thu 1/510:45 p.m.YYZ - LGW

Nonstop7h 00mAir Transat

Sun 11/512:40 p.m.LGW - YYZ

Nonstop8h 00mAir Transat

Deal found 16/4C$ 704

Thu 1/54:25 p.m.YYZ - LGW

1 stop12h 25mPorter Airlines

Sun 18/511:35 a.m.LGW - YYZ

1 stop12h 33mPorter Airlines

Deal found 17/4C$ 735

One-way flights from Ontario to London
Search for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 17 April 2025.

Mon 26/510:15 p.m.YYZ - LTN

2 stops18h 10mMultiple Airlines

Deal found 17/4C$ 336

Fri 9/56:20 p.m.YYZ - LGW

1 stop10h 05mWestJet

Deal found 16/4C$ 337

Tue 20/510:15 p.m.YYZ - STN

2 stops18h 00mMultiple Airlines

Deal found 17/4C$ 337

Wed 18/612:55 p.m.YYZ - LGW

1 stop15h 30mMultiple Airlines

Deal found 17/4C$ 338

Wed 28/510:15 p.m.YYZ - LHR

1 stop19h 15mMultiple Airlines

Deal found 17/4C$ 344

Thu 8/512:35 p.m.YTZ - LGW

3 stops15h 50mMultiple Airlines

Deal found 17/4C$ 352

Mon 26/510:15 p.m.YYZ - LCY

1 stop16h 35mMultiple Airlines

Deal found 17/4C$ 367

Mon 26/57:00 a.m.YTZ - LGW

1 stop21h 50mPorter Airlines

Deal found 17/4C$ 388

Mon 26/510:45 p.m.YYZ - LGW

Nonstop7h 00mPorter Airlines

Deal found 17/4C$ 413

Sun 6/76:45 a.m.YUL - LGW

1 stop22h 25mMultiple Airlines

Deal found 16/4C$ 430

Tue 27/58:50 a.m.YTZ - LHR

3 stops31h 50mMultiple Airlines

Deal found 16/4C$ 435

Mon 9/65:50 p.m.YYZ - LHR

1 stop18h 55mTAP AIR PORTUGAL

Deal found 17/4C$ 435

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 9/5

12:25 p.m.-6:30 a.m.

1 stop13h 05m

London Heathrow

Wed 14/5

8:40 a.m.-5:50 p.m.

2 stops14h 10m

C$ 664

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 8/5

10:45 p.m.-10:45 a.m.

Nonstop7h 00m

London Gatwick

Wed 14/5

12:40 p.m.-3:40 p.m.

Nonstop8h 00m

C$ 664

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Fri 23/5

10:10 p.m.-2:20 p.m.

1 stop11h 10m

London Stansted

Fri 20/6

10:50 p.m.-8:01 p.m.

2 stops26h 11m

C$ 664

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 1/6

11:00 p.m.-11:55 a.m.

1 stop31h 55m

London Heathrow

Sun 15/6

9:25 p.m.-9:55 p.m.

1 stop29h 30m

C$ 667

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 20/5

6:55 p.m.-9:50 a.m.

1 stop9h 55m

London Gatwick

Wed 28/5

11:35 a.m.-6:10 p.m.

1 stop11h 35m

C$ 668

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 1/5

6:20 p.m.-6:35 a.m.

Nonstop7h 15m

London Heathrow

Tue 6/5

8:45 a.m.-4:25 p.m.

1 stop12h 40m

C$ 668

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 2/6

11:00 p.m.-2:35 p.m.

1 stop10h 35m

London Gatwick

Thu 12/6

3:40 p.m.-9:55 p.m.

1 stop11h 15m

C$ 668

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sat 17/5

10:05 p.m.-9:50 a.m.

Nonstop6h 45m

London Gatwick

Sat 31/5

11:35 a.m.-2:15 p.m.

Nonstop7h 40m

C$ 674

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 8/7

9:15 p.m.-10:25 p.m.

1 stop20h 10m

London Luton

Thu 17/7

8:05 a.m.-2:10 p.m.

1 stop11h 05m

C$ 679

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Wed 21/5

9:00 p.m.-9:50 a.m.

1 stop31h 50m

London Gatwick

Fri 30/5

11:35 a.m.-8:00 p.m.

1 stop13h 25m

C$ 696

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/4

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London from Ontario with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London

What is the cheapest month to book a flight from Region of Ontario to London?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 874). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to LON?

When flying from Region of Ontario to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London

The most flights from CAON to LON are scheduled on a Thursday (47 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (26 on average).

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,917 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Porter Airlines

8.0

Very good

281 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,329 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air Transat

7.8

Good

385 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,269 reviews

Delta

8.0

Very good

7,917 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to London one-way?
For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 337. Users have also found prices from C$ 388 and C$ 435 on Porter Airlines and TAP AIR PORTUGAL, respectively.
What are the most popular routes from Region of Ontario to London?
The most popular flight routes from Region of Ontario to London are Toronto Pearson Intl - London Heathrow, Toronto Pearson Intl - London Gatwick and Montreal Pierre Elliott Trudeau Intl - London Heathrow.
What are the most reliable airlines from Region of Ontario to London?
Consider Ethiopian Air (88%), Egyptair (78%) or American Airlines (76%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to London.
What are the cheapest flights from Region of Ontario to London?
On average you can expect to pay C$ 1,861 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 488 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 625.
Can I find deals for flights from Ontario to London that include hotel bookings?
Yes. In addition to deals on Ontario to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.
Can I find deals for business class flights from Ontario to London?
Yes. Cheapflights offers flight deals from Ontario to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Region of Ontario to London?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 874). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Brentford

Hounslow

Sutton

Slough

Milton Keynes

Romford

Watford

Luton

Bromley

Bedford

Southall

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Ontario to London

Airline	Cheapest	Average	Flexibility	On-time
Finnair	CheapestC$ 488	AverageC$ 1,096	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
PLAY	CheapestC$ 499	AverageC$ 691	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	CheapestC$ 531	AverageC$ 647	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
WestJet Encore	CheapestC$ 553	AverageC$ 706	FlexibilityNo cancel fee	On-timeN/A	Search WestJet Encore flights
Air Transat	CheapestC$ 580	AverageC$ 973	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Icelandair	CheapestC$ 616	AverageC$ 861	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Porter Airlines	CheapestC$ 651	AverageC$ 901	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Aer Lingus	CheapestC$ 674	AverageC$ 860	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Delta	CheapestC$ 702	AverageC$ 868	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	CheapestC$ 710	AverageC$ 1,111	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to London?

Cheapflights helps you search for flights from Ontario to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Cheapflights simply makes it quick and affordable to book flights from Ontario to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to London with no change fees?

Need flexible booking options for your flight to London from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from Ontario to London from C$ 287

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 17 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ontario to London

Cheapest flights from Ontario to LondonExplore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to London that are best for you.

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London

What is the cheapest month to book a flight from Region of Ontario to London?

What is the cheapest time of day to fly from ON to LON?

Find hourly flight availability from Ontario to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 April 2025.

Weekly flight availability from Region of Ontario to London

Explore weekly flight availability from Ontario to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2025.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 17 April 2025.

See what other customers who have flown with Delta, Porter Airlines and KLM from Ontario to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Ontario to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Region of Ontario to London one-way?

What are the most popular routes from Region of Ontario to London?

What are the most reliable airlines from Region of Ontario to London?

What are the cheapest flights from Region of Ontario to London?

Can I find deals for flights from Ontario to London that include hotel bookings?

How can I find direct flights from Ontario to London?

Can I find deals for business class flights from Ontario to London?

What is the cheapest month to book a flight from Region of Ontario to London?

Travelling to a place near Ontario?

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Alternative routes for Ontario to London

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Top 10 airlines flying from Ontario to London

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Can Cheapflights find flights from Ontario to London with no change fees?

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

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Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.