What are the cheapest airlines flying from Ottawa to London round-trip?

Our cheapest airline available from Ottawa to London is Virgin Atlantic. Our recent data shows that you can find tickets from as low as C$ 855 on this airline. Additional options worth looking into are Air France and KLM, starting at C$ 872 and C$ 918 round-trip. You may be able to fly from Ottawa to London for 23% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ottawa to London one-way?

To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 450. Porter Airlines flights start at C$ 634 while deals on Air Transat start at C$ 675 one-way.

What are the most popular routes from Ottawa to London?

Most travellers choose Ottawa - London Heathrow, Ottawa - London Gatwick or Ottawa - London City when deciding on the best route from Ottawa to London.

What are the cheapest flights from Ottawa to London?

The cheapest flight price from Ottawa to London is C$ 951. On average you can expect to pay C$ 1,151. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 903.

What are the most popular airlines that fly from Ottawa to London?

Before booking your flight from Ottawa to London check out the most popular airlines for this route: Air Canada, Air France or Lufthansa.

What is the cheapest day to fly round-trip from Ottawa to London?

Saturday flights are found to be more expensive to fly from Ottawa to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

How far in advance should I book a flight from Ottawa to London?

To save up to 23% on this flight, we recommend booking at least 36 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ottawa to London from C$ 1,010 1-2 weeks out and tickets from C$ 1,217 for flights departing within the next 72 hours.

What is the cheapest month to fly from Ottawa to London?

February can be a great time to fly to London from Ottawa with a flight ticket averaging about C$ 1,119. Cheapflights users have found deals in the month of February for as cheap as C$ 817. The most expensive prices can be found in the month of December.

What airport do you fly from for flights from Ottawa to London?

Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London. You should not have trouble finding flights to London from Ottawa; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Ottawa airport to London. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

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

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

How can I find direct flights from Ottawa to London?

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

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

Yes. Cheapflights offers flight deals from Ottawa 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$ 450+ Flights from Ottawa to London

The best prices from Ottawa to London are usually found in February or January, booked 86 days in advance, depart on a Friday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from	C$ 855
One-way from	C$ 450
Popular in	December
Cheapest in	February
Average price	C$ 970
Good round-trip deal	C$ 1,007 or less
Good one-way deal	C$ 1,101 or less

Virgin Atlantic
24/2-3/3
2 total stops
31h 10m total
Ottawa to London

Search Deals

WestJet
25/3
2 total stops
35h 15m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (C$ 33 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 28 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 Ottawa to London (LON).

Search Deals

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

Search Deals

Find flight deals from Ottawa to London

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Thu 20/36:20 p.m.YOW - LHR

1 stop15h 25mAir France

Mon 24/37:35 p.m.LHR - YOW

1 stop24h 35mAir France

Deal found 20/2C$ 871

Sat 5/45:55 a.m.YOW - LGW

1 stop23h 50mMultiple Airlines

Wed 9/412:40 p.m.LGW - YOW

1 stop16h 29mMultiple Airlines

Deal found 20/2C$ 891

Sun 16/36:20 p.m.YOW - LHR

2 stops12h 25mMultiple Airlines

Mon 24/37:35 p.m.LHR - YOW

1 stop24h 35mMultiple Airlines

Deal found 20/2C$ 902

Sun 6/410:30 a.m.YOW - LGW

1 stop19h 15mPorter Airlines

Sun 13/412:40 p.m.LGW - YOW

1 stop17h 00mPorter Airlines

Deal found 20/2C$ 925

Sun 6/45:35 p.m.YOW - LHR

1 stop22h 25mAir Canada

Sun 13/49:30 a.m.LHR - YOW

1 stop10h 37mAir Canada

Deal found 20/2C$ 977

Sun 16/37:30 p.m.YOW - LHR

1 stop11h 35mUnited Airlines

Sat 22/38:00 a.m.LHR - YOW

1 stop12h 16mUnited Airlines

Deal found 20/2C$ 989

Fri 14/38:40 a.m.YOW - STN

2 stops21h 20mMultiple Airlines

Fri 28/311:00 a.m.STN - YOW

2 stops26h 44mMultiple Airlines

Deal found 20/2C$ 990

Mon 7/410:30 a.m.YOW - LGW

1 stop19h 15mAir Transat

Mon 21/412:40 p.m.LGW - YOW

1 stop24h 40mAir Transat

Deal found 19/2C$ 1,001

Sat 4/109:00 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Sat 18/1012:40 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Deal found 19/2C$ 1,018

Sun 6/45:55 a.m.YOW - LTN

2 stops32h 30mMultiple Airlines

Sun 13/42:10 p.m.LTN - YOW

2 stops38h 59mMultiple Airlines

Deal found 20/2C$ 1,058

Sat 22/36:15 a.m.YOW - LHR

1 stop26h 35mWestJet

Mon 24/32:50 p.m.LHR - YOW

2 stops33h 57mWestJet

Deal found 20/2C$ 1,139

Tue 1/42:10 p.m.YOW - LGW

2 stops22h 40mSWISS

Tue 8/46:35 p.m.LGW - YOW

2 stops29h 44mSWISS

Deal found 19/2C$ 1,165

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 February 2025.

Mon 24/25:20 p.m.YOW - LHR

1 stop20h 00mVirgin Atlantic

Mon 3/39:00 a.m.LHR - YOW

1 stop11h 10mVirgin Atlantic

Deal found 19/2C$ 855

Sun 16/36:20 p.m.YOW - LHR

1 stop20h 00mAir France

Mon 24/37:35 p.m.LHR - YOW

1 stop24h 35mAir France

Deal found 20/2C$ 872

Mon 24/25:20 p.m.YOW - LHR

2 stops12h 25mMultiple Airlines

Mon 3/39:00 a.m.LHR - YOW

1 stop11h 10mMultiple Airlines

Deal found 19/2C$ 886

Mon 24/25:20 p.m.YOW - LHR

2 stops12h 25mKLM

Mon 3/36:30 a.m.LHR - YOW

2 stops13h 40mKLM

Deal found 19/2C$ 918

Sun 6/410:30 a.m.YOW - LGW

1 stop19h 15mPorter Airlines

Sun 13/412:40 p.m.LGW - YOW

1 stop17h 00mPorter Airlines

Deal found 20/2C$ 925

Sat 5/45:25 p.m.YOW - LGW

1 stop12h 20mAir Transat

Sat 12/412:40 p.m.LGW - YOW

1 stop16h 57mAir Transat

Deal found 19/2C$ 973

Wed 19/33:11 p.m.YOW - LHR

1 stop11h 09mUnited Airlines

Wed 26/37:10 a.m.LHR - YOW

2 stops20h 44mUnited Airlines

Deal found 19/2C$ 973

Sun 6/45:35 p.m.YOW - LHR

1 stop22h 25mAir Canada

Sun 13/49:30 a.m.LHR - YOW

1 stop10h 37mAir Canada

Deal found 20/2C$ 977

Thu 1/56:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Thu 8/52:05 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Deal found 19/2C$ 1,018

Tue 1/42:10 p.m.YOW - LGW

2 stops22h 40mSWISS

Tue 8/46:35 p.m.LGW - YOW

2 stops29h 44mSWISS

Deal found 19/2C$ 1,165

Thu 13/34:00 p.m.YOW - LHR

1 stop12h 30mAustrian Airlines

Sat 22/37:25 p.m.LHR - YOW

2 stops27h 57mAustrian Airlines

Deal found 19/2C$ 1,173

Mon 5/55:55 a.m.YOW - LGW

2 stops22h 30mWestJet

Mon 26/510:45 a.m.LGW - YOW

2 stops18h 37mWestJet

Deal found 20/2C$ 1,210

Direct flights from Ottawa to London
Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 February 2025.

Thu 1/56:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Thu 8/52:05 p.m.LHR - YOW

Nonstop7h 20mLufthansa

Deal found 19/2C$ 1,018

Mon 5/56:55 p.m.YOW - LHR

Nonstop6h 35mMultiple Airlines

Mon 26/52:05 p.m.LHR - YOW

Nonstop7h 20mMultiple Airlines

Deal found 20/2C$ 6,906

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 20 February 2025 and is based on user searches.

Tue 25/24:00 p.m.YOW - LHR

1 stop11h 30mAir Canada

Tue 4/39:00 a.m.LHR - YOW

1 stop12h 56mAir Canada

Deal found 20/2C$ 1,024

Tue 25/25:10 p.m.YOW - LGW

1 stop11h 35mMultiple Airlines

Tue 4/38:15 a.m.LGW - YOW

2 stops21h 29mMultiple Airlines

Deal found 20/2C$ 1,318

Thu 27/22:50 p.m.YOW - LGW

1 stop13h 55mPorter Airlines

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

1 stop17h 57mPorter Airlines

Deal found 19/2C$ 1,021

Thu 27/22:10 p.m.YOW - LHR

2 stops26h 30mAustrian Airlines

Thu 6/32:50 p.m.LHR - YOW

2 stops32h 22mAustrian Airlines

Deal found 19/2C$ 1,251

Thu 27/24:00 p.m.YOW - LCY

2 stops15h 50mSWISS

Thu 6/39:25 a.m.LCY - YOW

2 stops14h 33mSWISS

Deal found 19/2C$ 2,538

Sat 1/31:00 p.m.YOW - LHR

2 stops14h 05mSWISS

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

2 stops15h 03mSWISS

Deal found 19/2C$ 2,200

Sun 2/35:50 p.m.YOW - LHR

1 stop10h 20mUnited Airlines

Mon 10/38:00 a.m.LHR - YOW

1 stop12h 16mUnited Airlines

Deal found 19/2C$ 989

Sun 2/32:50 p.m.YOW - LGW

1 stop13h 55mAir Transat

Mon 10/311:40 a.m.LGW - YOW

1 stop31h 30mAir Transat

Deal found 19/2C$ 1,016

Sun 2/36:20 p.m.YOW - LHR

2 stops55h 50mMultiple Airlines

Sun 9/36:00 p.m.LHR - YOW

1 stop31h 37mMultiple Airlines

Deal found 19/2C$ 1,192

Sun 2/35:55 a.m.YOW - LHR

2 stops43h 55mDelta

Mon 10/33:50 p.m.LHR - YOW

2 stops36h 19mDelta

Deal found 19/2C$ 1,382

Sun 2/37:00 a.m.YOW - STN

2 stops22h 00mMultiple Airlines

Fri 7/311:00 a.m.STN - YOW

2 stops18h 37mMultiple Airlines

Deal found 19/2C$ 1,466

Sun 2/35:20 p.m.YOW - LHR

2 stops12h 25mKLM

Sun 9/38:25 p.m.LHR - YOW

2 stops23h 45mKLM

Deal found 19/2C$ 1,669

One-way flights from Ottawa to London
Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 20 February 2025.

Tue 25/39:35 p.m.YOW - LHR

2 stops35h 15mWestJet

Deal found 19/2C$ 450

Sun 6/49:25 a.m.YOW - LGW

1 stop19h 35mMultiple Airlines

Deal found 20/2C$ 466

Tue 25/36:55 p.m.YOW - LHR

1 stop37h 55mMultiple Airlines

Deal found 19/2C$ 483

Fri 21/35:55 a.m.YOW - STN

3 stops26h 35mMultiple Airlines

Deal found 20/2C$ 497

Tue 25/38:40 a.m.YOW - LTN

3 stops33h 50mMultiple Airlines

Deal found 19/2C$ 501

Tue 25/25:10 p.m.YOW - LGW

1 stop11h 35mPorter Airlines

Deal found 19/2C$ 634

Sat 22/35:25 p.m.YOW - LCY

2 stops45h 05mMultiple Airlines

Deal found 20/2C$ 636

Wed 16/42:50 p.m.YOW - LGW

1 stop14h 55mAir Transat

Deal found 19/2C$ 675

Mon 28/46:55 p.m.YOW - LHR

Nonstop6h 35mAir Canada

Deal found 20/2C$ 984

Mon 7/46:55 p.m.YOW - LHR

Nonstop6h 35mLufthansa

Deal found 19/2C$ 1,008

Wed 14/51:55 p.m.YOW - LCY

2 stops13h 35mAer Lingus

Deal found 19/2C$ 1,142

Wed 16/44:45 p.m.YOW - LGW

2 stops18h 30mTurkish Airlines

Deal found 19/2C$ 1,185

Find flights from Ottawa to London within your budget

Fly from

Fly to

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 20/3

6:20 p.m.-1:45 p.m.

1 stop15h 25m

London Heathrow

Mon 24/3

7:35 p.m.-4:10 p.m.

1 stop24h 35m

C$ 871

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Sun 23/3

8:35 a.m.-10:00 a.m.

2 stops21h 25m

London Stansted

Sun 30/3

11:40 a.m.-12:37 a.m.

2 stops17h 57m

C$ 882

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sat 5/4

5:55 a.m.-10:45 a.m.

1 stop23h 50m

London Gatwick

Wed 9/4

12:40 p.m.-12:09 a.m.

1 stop16h 29m

C$ 891

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 16/3

6:20 p.m.-10:45 a.m.

2 stops12h 25m

London Heathrow

Mon 24/3

7:35 p.m.-4:10 p.m.

1 stop24h 35m

C$ 902

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 6/4

10:30 a.m.-10:45 a.m.

1 stop19h 15m

London Gatwick

Sun 13/4

12:40 p.m.-12:40 a.m.

1 stop17h 00m

C$ 925

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 6/4

5:35 p.m.-9:00 p.m.

1 stop22h 25m

London Heathrow

Sun 13/4

9:30 a.m.-3:07 p.m.

1 stop10h 37m

C$ 977

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 16/3

7:30 p.m.-11:05 a.m.

1 stop11h 35m

London Heathrow

Sat 22/3

8:00 a.m.-4:16 p.m.

1 stop12h 16m

C$ 989

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 7/4

10:30 a.m.-10:45 a.m.

1 stop19h 15m

London Gatwick

Mon 21/4

12:40 p.m.-8:20 a.m.

1 stop24h 40m

C$ 1,001

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 16/4

9:00 p.m.-8:35 a.m.

Nonstop6h 35m

London Heathrow

Wed 23/4

12:40 p.m.-3:00 p.m.

Nonstop7h 20m

C$ 1,020

OttawaLondon

YOW - LTN

YOWLTN

Ottawa

Sun 6/4

5:55 a.m.-7:25 p.m.

2 stops32h 30m

London Luton

Sun 13/4

2:10 p.m.-12:09 a.m.

2 stops38h 59m

C$ 1,058

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

Showing 1-10 of 40 results

Best time to book a flight from Ottawa to London

Have a flexible travel schedule? Discover the best time to fly to London from Ottawa 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 Ottawa to London

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

How far ahead should I book a flight from Ottawa to London?

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ottawa to London?

Currently, January is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 560). Flying from Ottawa 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 YOW to LON?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 11% on flights from Ottawa to London by exploring options for tickets in the morning.

What is the cheapest day to fly from Ottawa to London?

Travelers seeking maximum savings on their Ottawa to London flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 Ottawa 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

8,220 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

8,220 reviews

Delta

8.0

Very good

8,220 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

276 reviews

Delta

8.0

Very good

8,220 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

1,333 reviews

Delta

8.0

Very good

8,220 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

380 reviews

Delta

8.0

Very good

8,220 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.

Austrian Airlines

7.6

Good

773 reviews

Delta

8.0

Very good

8,220 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 airport do you fly from for flights from Ottawa to London?
Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London. You should not have trouble finding flights to London from Ottawa; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 6 airlines have flights from the Ottawa airport to London. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.
What are the cheapest airlines flying from Ottawa to London round-trip?
Our cheapest airline available from Ottawa to London is Virgin Atlantic. Our recent data shows that you can find tickets from as low as C$ 855 on this airline. Additional options worth looking into are Air France and KLM, starting at C$ 872 and C$ 918 round-trip. You may be able to fly from Ottawa to London for 23% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Ottawa to London one-way?
To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at C$ 450. Porter Airlines flights start at C$ 634 while deals on Air Transat start at C$ 675 one-way.
What are the most popular routes from Ottawa to London?
Most travellers choose Ottawa - London Heathrow, Ottawa - London Gatwick or Ottawa - London City when deciding on the best route from Ottawa to London.
What are the cheapest flights from Ottawa to London?
The cheapest flight price from Ottawa to London is C$ 951. On average you can expect to pay C$ 1,151. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 903.
Can I find deals for flights from Ottawa to London that include hotel bookings?
Yes. In addition to deals on Ottawa to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.
Can I find deals for business class flights from Ottawa to London?
Yes. Cheapflights offers flight deals from Ottawa 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 Ottawa to London?
Currently, January is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 560). Flying from Ottawa 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 6 airlines flying from Ottawa to London

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	CheapestC$ 753	AverageC$ 846	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air France	CheapestC$ 753	AverageC$ 953	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Lufthansa	CheapestC$ 920	AverageC$ 1,155	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Porter Airlines	CheapestC$ 929	AverageC$ 1,095	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Transat	CheapestC$ 972	AverageC$ 1,139	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Air Canada	CheapestC$ 981	AverageC$ 1,149	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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

Cheapflights helps you search for flights from Ottawa 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 Ottawa to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to London for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to London from Ottawa? 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 Ottawa to London become cheaper?

Yes! Start tracking prices for Ottawa to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Ottawa to London from C$ 450

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.

The best prices from Ottawa to London are usually found in February or January, booked 86 days in advance, depart on a Friday or Saturday and return on a Monday

Cheap flight deals from Ottawa to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Ottawa to London

Cheapest flights from Ottawa to LondonExplore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.

Find flights from Ottawa to London within your budget

Best time to book a flight from Ottawa to London

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

Travel insights for flights from Ottawa to London

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

How far ahead should I book a flight from Ottawa to London?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to London. Price data was last updated on 14 February 2025.

What is the cheapest month to book a flight from Ottawa to London?

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

Find hourly flight availability from Ottawa 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 20 February 2025.

What is the cheapest day to fly from Ottawa to London?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to London. Price data was last updated on 16 December 2024.

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 Ottawa 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 Ottawa to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Ottawa to London?

What are the cheapest airlines flying from Ottawa to London round-trip?

What are the cheapest airlines to fly from Ottawa to London one-way?

What are the most popular routes from Ottawa to London?

What are the cheapest flights from Ottawa to London?

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

How can I find direct flights from Ottawa to London?

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

What is the cheapest month to book a flight from Ottawa to London?

Travelling to a place near Ottawa?

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Fly from Ottawa to London on these airlines

Choose from the following airlines for your flight from Ottawa to London. Flights are based on user searches made on Cheapflights and were last updated on 20 February 2025.

Top 6 airlines flying from Ottawa to London

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Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 February 2025.