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

For one-way options, check prices for Air Transat. According to our data, you can fly for as low as C$ 349. Users have also found prices from C$ 349 and C$ 426 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$ 1,959 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 582 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 361.

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

Consider Singapore Airlines (67%), American Airlines (65%) or Aer Lingus (65%) 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 23% 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$ 913, or C$ 1,150 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$ 882. Cheapflights users have found deals in the month of February for as cheap as C$ 539. 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$ 349+ Flights from Ontario to London

Cheap flight deals from Ontario to London

Round-trip from	C$ 652
One-way from	C$ 349
Popular in	December
Cheapest in	February
Average price	C$ 730
Good round-trip deal	C$ 675 or less
Good one-way deal	C$ 457 or less

Porter Airlines
12/4-18/4
Nonstop
15h 30m total
Ontario to London

Search Deals

Air Transat
1/5
1 total stop
14h 05m total
Ontario to London

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (C$ 23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 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 22 February 2025.

Sat 12/410:35 p.m.YYZ - LGW

Nonstop7h 10mPorter Airlines

Fri 18/412:40 p.m.LGW - YYZ

Nonstop8h 20mPorter Airlines

Deal found 21/2C$ 652

Sun 23/36:35 p.m.YYZ - LHR

1 stop14h 05mTAP AIR PORTUGAL

Sun 30/36:00 a.m.LHR - YYZ

1 stop12h 55mTAP AIR PORTUGAL

Deal found 21/2C$ 653

Sun 23/310:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Thu 27/311:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 21/2C$ 653

Sun 16/39:10 p.m.YYZ - LHR

Nonstop7h 20mAir Canada

Mon 24/36:00 a.m.LHR - YYZ

1 stop13h 35mAir Canada

Deal found 21/2C$ 657

Thu 17/44:20 p.m.YTZ - LHR

1 stop9h 10mAir Canada

Wed 23/46:50 a.m.LHR - YTZ

2 stops13h 00mAir Canada

Deal found 21/2C$ 667

Thu 22/52:45 p.m.YTZ - LGW

1 stop14h 05mPorter Airlines

Tue 3/611:35 a.m.LGW - YTZ

1 stop13h 25mPorter Airlines

Deal found 21/2C$ 676

Wed 7/510:10 p.m.YYZ - STN

1 stop17h 45mMultiple Airlines

Tue 13/58:15 a.m.STN - YYZ

1 stop10h 55mMultiple Airlines

Deal found 21/2C$ 704

Fri 16/58:55 p.m.YTZ - LGW

1 stop31h 55mAir Transat

Sun 25/511:35 a.m.LGW - YTZ

1 stop11h 35mAir Transat

Deal found 22/2C$ 708

Wed 7/510:10 p.m.YYZ - LTN

1 stop12h 15mMultiple Airlines

Tue 13/59:50 p.m.LTN - YYZ

1 stop21h 20mMultiple Airlines

Deal found 21/2C$ 718

Thu 20/37:10 p.m.YYZ - LHR

Nonstop7h 20mLufthansa

Tue 25/31:30 p.m.LHR - YYZ

1 stop11h 25mLufthansa

Deal found 21/2C$ 727

Sun 6/410:35 p.m.YYZ - LGW

Nonstop7h 10mMultiple Airlines

Sun 13/49:50 a.m.LGW - YYZ

1 stop33h 25mMultiple Airlines

Deal found 21/2C$ 732

Fri 21/33:25 p.m.YTZ - LHR

2 stops14h 40mMultiple Airlines

Fri 28/37:40 a.m.LHR - YTZ

2 stops18h 10mMultiple Airlines

Deal found 21/2C$ 742

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 22 February 2025.

Sat 12/410:35 p.m.YYZ - LGW

Nonstop7h 10mPorter Airlines

Fri 18/412:40 p.m.LGW - YYZ

Nonstop8h 20mPorter Airlines

Deal found 21/2C$ 652

Sun 23/36:35 p.m.YYZ - LHR

1 stop14h 05mTAP AIR PORTUGAL

Sun 30/36:00 a.m.LHR - YYZ

1 stop12h 55mTAP AIR PORTUGAL

Deal found 21/2C$ 653

Sun 23/310:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Thu 27/311:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 21/2C$ 653

Sun 16/39:10 p.m.YYZ - LHR

Nonstop7h 20mAir Canada

Mon 24/36:00 a.m.LHR - YYZ

1 stop13h 35mAir Canada

Deal found 21/2C$ 657

Wed 7/510:10 p.m.YYZ - STN

1 stop17h 45mMultiple Airlines

Tue 13/58:15 a.m.STN - YYZ

1 stop10h 55mMultiple Airlines

Deal found 21/2C$ 704

Thu 20/37:10 p.m.YYZ - LHR

Nonstop7h 20mLufthansa

Tue 25/31:30 p.m.LHR - YYZ

1 stop11h 25mLufthansa

Deal found 21/2C$ 727

Mon 28/45:35 p.m.YYZ - LGW

1 stop10h 50mWestJet

Wed 4/610:45 a.m.LGW - YYZ

1 stop11h 25mWestJet

Deal found 22/2C$ 772

Tue 1/48:20 p.m.YYZ - LGW

1 stop16h 30mSWISS

Wed 30/46:35 p.m.LGW - YYZ

1 stop23h 15mSWISS

Deal found 22/2C$ 782

Sun 6/48:50 p.m.YYZ - LGW

1 stop9h 55mIcelandair

Sun 13/43:40 p.m.LGW - YYZ

1 stop32h 30mIcelandair

Deal found 20/2C$ 786

Wed 23/412:25 p.m.YYZ - LHR

1 stop13h 30mUnited Airlines

Tue 6/57:25 a.m.LHR - YYZ

2 stops19h 58mUnited Airlines

Deal found 21/2C$ 794

Sun 23/37:05 p.m.YYZ - LHR

1 stop15h 00mAustrian Airlines

Tue 1/47:30 p.m.LHR - YYZ

1 stop23h 20mAustrian Airlines

Deal found 22/2C$ 801

Sat 12/46:25 p.m.YYZ - LHR

Nonstop7h 10mBritish Airways

Thu 17/41:20 p.m.LHR - YYZ

Nonstop7h 40mBritish Airways

Deal found 22/2C$ 802

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 22 February 2025.

Sat 12/410:35 p.m.YYZ - LGW

Nonstop7h 10mPorter Airlines

Fri 18/412:40 p.m.LGW - YYZ

Nonstop8h 20mPorter Airlines

Deal found 21/2C$ 652

Sun 23/310:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Thu 27/311:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 21/2C$ 653

Sun 16/39:10 p.m.YYZ - LHR

Nonstop7h 20mAir Canada

Mon 24/36:00 p.m.LHR - YYZ

Nonstop8h 00mAir Canada

Deal found 21/2C$ 700

Wed 12/37:10 p.m.YYZ - LHR

Nonstop7h 20mLufthansa

Wed 26/36:00 p.m.LHR - YYZ

Nonstop8h 00mLufthansa

Deal found 21/2C$ 730

Fri 28/37:10 p.m.YYZ - LHR

Nonstop7h 20mMultiple Airlines

Sun 6/45:40 p.m.LHR - YYZ

Nonstop7h 50mMultiple Airlines

Deal found 21/2C$ 768

Thu 10/410:05 p.m.YYZ - LHR

Nonstop7h 15mBritish Airways

Sat 19/45:15 p.m.LHR - YYZ

Nonstop7h 55mBritish Airways

Deal found 21/2C$ 799

Thu 1/510:05 p.m.YUL - LGW

Nonstop6h 45mPorter Airlines

Wed 7/511:35 a.m.LGW - YUL

Nonstop7h 40mPorter Airlines

Deal found 21/2C$ 816

Wed 16/410:30 p.m.YYZ - LHR

Nonstop7h 10mVirgin Atlantic

Sun 20/45:50 p.m.LHR - YYZ

Nonstop7h 50mVirgin Atlantic

Deal found 21/2C$ 826

Thu 10/410:30 p.m.YYZ - LHR

Nonstop7h 10mDelta

Tue 15/45:50 p.m.LHR - YYZ

Nonstop7h 50mDelta

Deal found 21/2C$ 830

Sat 3/510:25 p.m.YUL - LHR

Nonstop6h 35mLufthansa

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

Nonstop7h 10mLufthansa

Deal found 20/2C$ 835

Mon 9/610:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Fri 20/611:35 a.m.LGW - YUL

Nonstop7h 40mAir Transat

Deal found 21/2C$ 884

Sun 9/38:15 p.m.YUL - LHR

Nonstop6h 55mAir Canada

Tue 18/33:00 p.m.LHR - YUL

Nonstop7h 40mAir Canada

Deal found 22/2C$ 900

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 22 February 2025 and is based on user searches.

Wed 26/26:10 p.m.YYZ - LHR

Nonstop7h 20mMultiple Airlines

Mon 3/35:30 p.m.LHR - YYZ

1 stop31h 25mMultiple Airlines

Deal found 22/2C$ 752

Thu 27/29:35 p.m.YYZ - LGW

Nonstop7h 10mPorter Airlines

Thu 6/311:40 a.m.LGW - YYZ

Nonstop8h 20mPorter Airlines

Deal found 21/2C$ 663

Thu 27/29:35 p.m.YYZ - LGW

Nonstop7h 10mAir Transat

Thu 6/311:40 a.m.LGW - YYZ

Nonstop8h 20mAir Transat

Deal found 22/2C$ 664

Thu 27/26:10 p.m.YYZ - LHR

Nonstop7h 20mMultiple Airlines

Thu 6/36:00 p.m.LHR - YYZ

Nonstop8h 00mMultiple Airlines

Deal found 22/2C$ 738

Thu 27/26:00 p.m.YYZ - LHR

1 stop10h 00mVirgin Atlantic

Wed 5/39:00 a.m.LHR - YYZ

1 stop17h 25mVirgin Atlantic

Deal found 22/2C$ 813

Sat 1/38:10 a.m.YYZ - LHR

1 stop17h 30mUnited Airlines

Sat 8/33:10 p.m.LHR - YYZ

1 stop12h 08mUnited Airlines

Deal found 21/2C$ 811

Sun 2/38:10 p.m.YYZ - LHR

Nonstop7h 20mLufthansa

Tue 11/31:30 p.m.LHR - YYZ

1 stop11h 25mLufthansa

Deal found 21/2C$ 727

Sun 2/36:35 p.m.YYZ - LHR

1 stop10h 55mDelta

Sun 9/36:30 a.m.LHR - YYZ

1 stop14h 10mDelta

Deal found 21/2C$ 832

Sun 2/38:30 p.m.YYZ - LCY

1 stop11h 20mMultiple Airlines

Wed 12/310:00 a.m.LCY - YYZ

1 stop14h 55mMultiple Airlines

Deal found 22/2C$ 859

Sun 2/311:50 a.m.YYZ - LGW

2 stops16h 10mAmerican Airlines

Mon 10/312:30 p.m.LGW - YYZ

2 stops26h 36mAmerican Airlines

Deal found 21/2C$ 863

Mon 3/36:15 p.m.YYZ - LHR

1 stop10h 30mAir Canada

Sat 8/38:55 a.m.LHR - YYZ

1 stop12h 25mAir Canada

Deal found 21/2C$ 724

Mon 3/37:45 p.m.YYZ - STN

1 stop22h 50mMultiple Airlines

Tue 27/510:35 p.m.STN - YYZ

1 stop20h 35mMultiple Airlines

Deal found 22/2C$ 826

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 22 February 2025.

Thu 1/52:45 p.m.YTZ - LGW

1 stop14h 05mAir Transat

Deal found 20/2C$ 349

Sat 15/310:35 p.m.YYZ - LGW

Nonstop7h 10mPorter Airlines

Deal found 21/2C$ 349

Fri 21/36:15 p.m.YYZ - STN

1 stop19h 40mMultiple Airlines

Deal found 21/2C$ 352

Tue 25/39:10 p.m.YYZ - LHR

1 stop35h 40mMultiple Airlines

Deal found 22/2C$ 365

Sat 5/48:15 p.m.YYZ - LGW

1 stop32h 45mMultiple Airlines

Deal found 21/2C$ 365

Thu 3/411:55 a.m.YTZ - LGW

1 stop13h 25mMultiple Airlines

Deal found 21/2C$ 396

Tue 13/510:00 a.m.YUL - LGW

1 stop19h 45mPorter Airlines

Deal found 21/2C$ 413

Sat 3/510:05 p.m.YUL - LGW

Nonstop6h 45mAir Transat

Deal found 21/2C$ 419

Tue 25/39:00 p.m.YYZ - LTN

1 stop12h 50mMultiple Airlines

Deal found 21/2C$ 423

Wed 23/45:40 p.m.YYZ - LHR

1 stop19h 05mTAP AIR PORTUGAL

Deal found 21/2C$ 426

Sun 30/36:45 a.m.YUL - LGW

1 stop23h 00mMultiple Airlines

Deal found 20/2C$ 426

Wed 26/310:45 p.m.YUL - LHR

1 stop14h 45mTAP AIR PORTUGAL

Deal found 22/2C$ 427

Find flights from Ontario to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 27/2

9:35 p.m.-9:45 a.m.

Nonstop7h 10m

London Gatwick

Mon 10/3

11:40 a.m.-4:00 p.m.

Nonstop8h 20m

C$ 650

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 23/3

6:35 p.m.-12:40 p.m.

1 stop14h 05m

London Heathrow

Sun 30/3

6:00 a.m.-1:55 p.m.

1 stop12h 55m

C$ 653

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 23/3

10:35 p.m.-9:45 a.m.

Nonstop7h 10m

London Gatwick

Thu 27/3

11:40 a.m.-4:00 p.m.

Nonstop8h 20m

C$ 653

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 16/3

9:10 p.m.-8:30 a.m.

Nonstop7h 20m

London Heathrow

Mon 24/3

6:00 a.m.-3:35 p.m.

1 stop13h 35m

C$ 657

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 17/4

4:20 p.m.-6:30 a.m.

1 stop9h 10m

London Heathrow

Wed 23/4

6:50 a.m.-2:50 p.m.

2 stops13h 00m

C$ 667

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Thu 22/5

2:45 p.m.-9:50 a.m.

1 stop14h 05m

London Gatwick

Tue 3/6

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

1 stop13h 25m

C$ 676

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 7/5

10:10 p.m.-8:55 p.m.

1 stop17h 45m

London Stansted

Tue 13/5

8:15 a.m.-2:10 p.m.

1 stop10h 55m

C$ 704

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Thu 12/6

8:50 a.m.-9:50 a.m.

1 stop20h 00m

London Gatwick

Sat 21/6

11:35 a.m.-8:25 a.m.

1 stop25h 50m

C$ 714

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 7/5

10:10 p.m.-3:25 p.m.

1 stop12h 15m

London Luton

Tue 13/5

9:50 p.m.-2:10 p.m.

1 stop21h 20m

C$ 718

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 20/3

7:10 p.m.-6:30 a.m.

Nonstop7h 20m

London Heathrow

Tue 25/3

1:30 p.m.-8:55 p.m.

1 stop11h 25m

C$ 727

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

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.

Travel insights for flights from Ontario to London

Get recent, data-driven insights about flights from Ontario to London including ideal travel times, pricing trends, and more.

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 Friday (38 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 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

8,203 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

8,203 reviews

Delta

8.0

Very good

8,203 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

7.9

Good

277 reviews

Delta

8.0

Very good

8,203 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

1,330 reviews

Delta

8.0

Very good

8,203 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

382 reviews

Delta

8.0

Very good

8,203 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

1,271 reviews

Delta

8.0

Very good

8,203 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 Air Transat. According to our data, you can fly for as low as C$ 349. Users have also found prices from C$ 349 and C$ 426 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 Singapore Airlines (67%), American Airlines (65%) or Aer Lingus (65%) 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$ 1,959 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 582 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 361.
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

Slough

Luton

Milton Keynes

Romford

Watford

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
PLAY	CheapestC$ 402	AverageC$ 675	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Finnair	CheapestC$ 521	AverageC$ 1,049	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
TAP AIR PORTUGAL	CheapestC$ 546	AverageC$ 668	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Scandinavian Airlines	CheapestC$ 611	AverageC$ 1,049	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Aer Lingus	CheapestC$ 622	AverageC$ 822	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	CheapestC$ 634	AverageC$ 911	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Porter Airlines	CheapestC$ 664	AverageC$ 926	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Transat	CheapestC$ 665	AverageC$ 988	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Air Canada	CheapestC$ 700	AverageC$ 1,095	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Delta	CheapestC$ 719	AverageC$ 889	FlexibilityNo cancel fee	On-timeN/A	Search Delta 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.

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Cheap flights from Ontario to London from C$ 349

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 1/5. 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 22 February 2025.

Round-trip from

One-way from

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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 22 February 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 22 February 2025.

Find flights from Ontario to London within your budget

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.

Travel insights for flights from Ontario to London

Get recent, data-driven insights about flights from Ontario to London including ideal travel times, pricing trends, and more.

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 22 February 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 22 February 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

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 22 February 2025.