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Cheap flights from London to Ottawa from £213

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
5 Sep — 12 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 54 days in advance, depart on a Friday or Sunday and return on a Friday

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 6 August 2026.

Sun 13/912:40 -
1 stop12h 20m
Fri 18/919:40 -
Nonstop7h 15m
Deal found 1/8£429
Sat 12/909:40 -
1 stop19h 45m
Sat 26/907:00 -
1 stop22h 45m
Deal found 1/8£431
Thu 1/1006:50 -
2 stops17h 05m
Tue 13/1019:30 -
2 stops14h 10m
Deal found 3/8£432
Wed 9/909:40 -
1 stop15h 20m
Sun 20/919:40 -
Nonstop7h 15m
Deal found 1/8£433
Fri 11/909:40 -
Nonstop8h 00m
Tue 15/919:40 -
Nonstop7h 15m
Deal found 1/8£434
Fri 4/909:40 -
Nonstop8h 00m
Thu 10/916:00 -
1 stop10h 55m
Deal found 1/8£434
Wed 16/912:40 -
2 stops13h 04m
Wed 23/914:45 -
1 stop10h 45m
Deal found 2/8£434
Tue 8/909:40 -
Nonstop8h 00m
Tue 15/919:40 -
Nonstop7h 15m
Deal found 1/8£435
Thu 10/917:55 -
2 stops30h 04m
Thu 17/917:57 -
2 stops17h 28m
Deal found 1/8£436
Mon 14/1206:30 -
2 stops13h 30m
Tue 29/1217:10 -
1 stop9h 45m
Deal found 3/8£437
Thu 20/809:40 -
1 stop16h 40m
Sun 20/920:55 -
1 stop30h 00m
Deal found 1/8£438
Mon 7/912:40 -
1 stop16h 45m
Fri 18/919:40 -
Nonstop7h 15m
Deal found 1/8£440

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 6 August 2026.

Round-trip from

£429

One-way from

£213

Popular in

December

Cheapest in

June

Average price

£556

Good round-trip deal

£488 or less

Good one-way deal

£353 or less
Air Transat
  • Air Transat
  • 13/9-18/9
  • 1 total stop
  • 19h 35m total
  • London to Ottawa
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 31h 50m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£26 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 August 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 6 August 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 London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sat 12/9

09:40-00:25

1 stop19h 45m

Ottawa

Sat 26/9

07:00-10:45

1 stop22h 45m

£431

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sat 5/9

12:40-08:05

1 stop24h 25m

Ottawa

Sat 12/9

07:00-10:45

1 stop22h 45m

£443

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sun 13/9

09:40-12:40

Nonstop8h 00m

Ottawa

Wed 23/9

20:55-07:55

1 stop30h 00m

£447

LondonOttawa

LHR London Heathrow - YOW Ottawa

LHRYOW

London Heathrow

Sat 19/9

08:00-17:16

1 stop14h 16m

Ottawa

Sat 26/9

19:30-10:40

1 stop10h 10m

£449
Fastest return journey

LondonOttawa

LHR London Heathrow - YOW Ottawa

LHRYOW

London Heathrow

Sat 5/9

14:10-17:05

Nonstop7h 55m

Ottawa

Sat 12/9

21:00-08:35

Nonstop6h 35m

£502

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sat 5/9

12:40-20:00

1 stop12h 20m

Ottawa

Sat 12/9

18:25-07:55

2 stops32h 30m

£506

LondonOttawa

LHR London Heathrow - YOW Ottawa

LHRYOW

London Heathrow

Tue 25/8

07:45-23:54

2 stops21h 09m

Ottawa

Fri 25/9

18:01-10:25

1 stop11h 24m

£507

LondonOttawa

LHR London Heathrow - YOW Ottawa

LHRYOW

London Heathrow

Sat 5/9

07:25-18:55

2 stops16h 30m

Ottawa

Sat 12/9

15:10-10:40

2 stops14h 30m

£518

LondonOttawa

LCY London City - YOW Ottawa

LCYYOW

London City

Tue 25/8

07:45-17:35

2 stops14h 50m

Ottawa

Fri 25/9

17:10-11:40

2 stops13h 30m

£531

LondonOttawa

LHR London Heathrow - YOW Ottawa

LHRYOW

London Heathrow

Mon 12/10

08:00-17:16

1 stop14h 16m

Ottawa

Fri 30/10

12:10-06:20

2 stops14h 10m

£573

Flights are sorted by cheapest return flights first.

Deals found on 4/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, June is the cheapest month in which you can book a flight from London to Ottawa (average of £440). Flying from London to Ottawa in December is currently the most expensive (average of £695). 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 6 August 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.

How much does it cost for a return flight from London to Ottawa?

Airfare is below average for this route at the moment.
London to Ottawa flights typically cost between £509 and £633 in September.
The cheapest return price found within the last 5 days was £429 on Air Transat (13 Sept–18 Sept).

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 61% 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 £482.

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 36m.

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 Halifax (YHZ) offer the fastest connection on this route, with an average stopover time of 1h 03m.

How often are flights from London to Ottawa delayed?

About 11% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 202 minutes.

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

Historically, flights departing in the morning 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 Tuesday 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 11% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 75 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.

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 6 August 2026.
Check out reviews from past customers who have flown with Air Transat,Air France, andVirgin Atlantic 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
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Transat
7.8
Good
572 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air France
7.5
Good
1,637 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Virgin Atlantic
7.5
Good
694 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Canada
7.1
Good
11,429 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Lufthansa
6.8
Okay
8,176 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Boarding

8.0

Overall

7.8

Crew

8.5

Entertainment

7.1

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.

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 Air Canada can get you from London to Ottawa in just under 7h 55m. Your travel time can differ by up to 11h 50m. 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 Transat, at £339, was found to be the cheapest airline from London to Ottawa.Alternate airlines flying return to your destination include Air France and Virgin Atlantic. Users have found that Air Transat is 37% 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 £290. Users have also found prices from £474 and £568 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 City - Ottawa or London Gatwick - Ottawa as they are the most popular.

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

    Consider Air Canada (86%), Austrian Airlines (86%) or SriLankan Airlines (86%) 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 £513, our data indicates the cheapest price to be £356. The most popular route (London Heathrow - Ottawa), is priced around £381.

  • 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, June is the cheapest month in which you can book a flight from London to Ottawa (average of £440). Flying from London to Ottawa in December is currently the most expensive (average of £695). 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
Gatineau
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 6 August 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 6 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£339Average£494FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air FranceCheapest£362Average£492FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£363Average£522FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£370Average£552FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£394Average£551FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£507Average£543FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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