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Cheap flights from London to Ottawa from £205

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
20 Apr — 27 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 90 days in advance, depart on a Friday or Thursday and return on a Monday

Cheap flight deals from London to Ottawa

Enter your travel dates to find the best prices.

Cheapest flights from London to Ottawa
Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 March 2026.

Sun 31/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Thu 4/607:00
YOW
-
LGW
1 stop19h 55m
Air Transat
Deal found 20/3£371
Mon 1/609:40
LGW
-
YOW
1 stop15h 20m
Air Transat
Fri 5/619:40
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 20/3£374
Fri 29/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 7/614:15
YOW
-
LGW
1 stop14h 35m
Air Transat
Deal found 20/3£375
Sun 31/512:40
LGW
-
YOW
1 stop12h 20m
Air Transat
Sun 7/618:35
YOW
-
LGW
1 stop11h 10m
Air Transat
Deal found 18/3£377
Sun 31/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 31/519:40
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 18/3£378
Fri 15/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 24/519:40
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 21/3£379
Sun 31/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Mon 1/608:40
YOW
-
LGW
1 stop21h 05m
Air Transat
Deal found 21/3£380
Sun 31/509:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Tue 9/619:40
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 20/3£382
Fri 15/520:05
LHR
-
YOW
2 stops26h 06m
Multiple Airlines
Thu 21/518:55
YOW
-
LHR
Nonstop6h 35m
Multiple Airlines
Deal found 18/3£408
Sat 13/612:40
LHR
-
YOW
1 stop11h 13m
Air Canada
Tue 23/614:35
YOW
-
LHR
1 stop10h 55m
Air Canada
Deal found 21/3£412
Fri 15/512:40
LHR
-
YOW
1 stop11h 13m
Air Canada
Thu 21/518:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 18/3£413
Sat 20/612:40
LHR
-
YOW
1 stop11h 13m
Air Canada
Thu 25/618:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 20/3£414

Find flight deals from London to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Ottawa (YOW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 March 2026.

Round-trip from

£371

One-way from

£205

Popular in

August

Cheapest in

June

Average price

£576

Good round-trip deal

£383 or less

Good one-way deal

£584 or less
Air Transat
  • Air Transat
  • 22/5-1/6
  • 1 total stop
  • 18h 55m total
  • London to Ottawa
Search Deals
19/4
  • 19/4
  • 2 total stops
  • 43h 49m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£29 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Ottawa.
Search Deals
Price to beat on a one-way flight from London (LON) to Ottawa.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Ottawa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 March 2026.
Use the filters below to find and compare flights from London to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 26/5

12:40-20:00

1 stop12h 20m

Ottawa

Sat 6/6

08:40-07:55

1 stop18h 15m

£394

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 5/6

09:40-12:40

Nonstop8h 00m

Ottawa

Thu 18/6

16:00-07:55

1 stop10h 55m

£408

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 28/5

12:40-20:00

1 stop12h 20m

Ottawa

Mon 8/6

18:35-10:45

1 stop11h 10m

£438

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 30/5

07:30-21:35

2 stops19h 05m

Ottawa

Fri 5/6

10:44-07:15

2 stops15h 31m

£457

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/6

06:55-10:03

2 stops32h 08m

Ottawa

Thu 18/6

06:05-21:35

1 stop10h 30m

£457

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/6

07:25-23:54

2 stops21h 29m

Ottawa

Sat 27/6

10:44-07:15

2 stops15h 31m

£458

LondonOttawa

STN - YOW

STNYOW

London Stansted

Fri 15/5

22:00-00:20

3 stops31h 20m

Ottawa

Sun 24/5

06:55-21:55

2 stops34h 00m

£459

LondonOttawa

STN - YOW

STNYOW

London Stansted

Thu 21/5

06:30-00:20

3 stops22h 50m

Ottawa

Fri 22/5

18:25-23:20

3 stops23h 55m

£468

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 25/4

12:40-00:41

1 stop17h 01m

Ottawa

Wed 7/10

07:00-10:45

1 stop22h 45m

£477

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 25/4

12:40-00:41

1 stop17h 01m

Ottawa

Thu 8/10

16:00-07:55

1 stop10h 55m

£477

Flights are sorted by cheapest return flights first.

Deals found on 17/3

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from London to Ottawa

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

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

Use this chart to determine the optimal time to book a return flight from London to Ottawa. Price data was last updated on 13 March 2026.

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, September is the cheapest month in which you can book a flight from London to Ottawa (average of £286). Flying from London to Ottawa in December is currently the most expensive (average of £387). 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 LON to YOW?

Find hourly flight availability from London to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 March 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Ottawa as you normally would.

What’s the top stopover airport for flights from London to Ottawa?

Share of one-stop return flights from London to Ottawa chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Paris (CDG) – chosen by Cheapflights users on 41% of one-stop itineraries from London to Ottawa on Cheapflights.

What’s the cheapest stopover airport for flights from London to Ottawa?

Average return fare for one-stop flights from London to Ottawa, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Paris (CDG) is the most affordable one-stop option, with an average return flight price of £464.

What’s the fastest stopover option from London to Ottawa?

Shortest average travel time for one-stop one-way flights from London to Ottawa, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 9h 59m.

Which airport typically offers the quickest stopover for flights from London to Ottawa?

Average stopover duration for one-stop one-way flights from London to Ottawa, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Washington, D.C. (IAD) offer the fastest connection on this route, with an average stopover time of 1h 13m.

How often are flights from London to Ottawa delayed?

About 9% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 236 minutes.

What is the most punctual flight time for London to Ottawa flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Monday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Ottawa flights?

Over the past year, Air Canada have had the lowest number of delays on this route, with just 9% of flights being delayed.

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated 21 March 2026.
Check out reviews from past customers who have flown with Air Transat,Virgin Atlantic, andAir France from London to Ottawa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Air Transat
7.7
Good
521 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Virgin Atlantic
7.5
Good
682 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Air France
7.4
Good
1,547 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Air Canada
7.1
Good
10,828 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Lufthansa
6.8
Okay
7,860 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Boarding

7.9

Comfort

7.3

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.

Related info for your journey

Find useful and relevant information for your journey from London to Ottawa. 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 into for flights to Ottawa from London?

    If you book a flight to Ottawa from London, you will be flying to Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There are 2 flights from London to Ottawa per day from 6 different airlines.

  • How long is the flight from London to Ottawa?

    Air Transat, United Airlines, and Virgin Atlantic can get you from London to Ottawa in just under 11h 05m. Your travel time can differ by up to 8h. Airlines will cover a distance of 3320 mi. This flight may include one or multiple stops.

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

    Air Canada, at £306, was found to be the cheapest airline from London to Ottawa.Alternate airlines flying return to your destination include United Airlines and Air France. Users have found that Air Canada is 44% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Virgin Atlantic. According to our data, you can fly for as low as £293. Users have also found prices from £517 and £574 on Lufthansa and Air Canada, respectively.

  • What are the most popular routes from London to Ottawa?

    When deciding which route to take from London to Ottawa consider London Heathrow - Ottawa, London Gatwick - Ottawa or London Stansted - Ottawa as they are the most popular.

  • What are the most reliable airlines from London to Ottawa?

    Consider Air Canada (89%), Austrian Airlines (89%) or SriLankan Airlines (89%) when booking your flight. These represent the most reliable airlines when flying from London to Ottawa.

  • What are the cheapest flights from London to Ottawa?

    Looking for the cheapest flight from London to Ottawa? While on average our users pay £583, our data indicates the cheapest price to be £339. The most popular route (London Heathrow - Ottawa), is priced around £408.

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

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

  • How can I find direct flights from London to Ottawa?

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

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

    Yes. Cheapflights offers flight deals from London to Ottawa 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 London to Ottawa?

    Currently, September is the cheapest month in which you can book a flight from London to Ottawa (average of £286). Flying from London to Ottawa in December is currently the most expensive (average of £387). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Brockville
Smiths Falls

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Fly from London to Ottawa on these airlines

Choose from the following airlines for your flight from London to Ottawa. Flights are based on user searches made on Cheapflights and were last updated on 21 March 2026.
Air Canada flights from London to Ottawa
Air Transat flights from London to Ottawa
Lufthansa flights from London to Ottawa

Top 6 airlines flying from London to Ottawa

Discover the top 6 airlines that operate flights from London to Ottawa. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£306Average£429FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£338Average£355FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air FranceCheapest£370Average£534FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£372Average£454FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapest£428Average£478FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£461Average£539FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find London to Ottawa flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to Ottawa from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Ottawa flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from London to Ottawa on Cheapflights with our Price Alert feature and get notified when better prices are available.

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