Cheap flights from London to Ottawa from £207

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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
3 Sep — 10 Sep1
1 adult

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or February, booked 90 days in advance, depart on a Monday or Friday and return on a Monday

Cheap 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 29 August 2025.

Round-trip from

£471

One-way from

£207

Popular in

August

Cheapest in

January

Average price

£739

Good round-trip deal

£535 or less

Good one-way deal

£610 or less
Virgin Atlantic
  • Virgin Atlantic
  • 8/9-16/9
  • 2 total stops
  • 29h 52m total
  • London to Ottawa
22/9
  • 22/9
  • 3 total stops
  • 22h 57m total
  • London to Ottawa
Highest demand for flights based on searches. 13% potential increase in price (£63 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Average for round-trip flights in August 2025
Price to beat on a round-trip flight from London (LON) to Ottawa.
Price to beat on a one-way flight from London (LON) to Ottawa.

Find flight deals from London to Ottawa

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 29 August 2025.

Mon 8/917:50LHR - YOW
1 stop11h 32mMultiple Airlines
Tue 16/917:15YOW - LHR
1 stop18h 20mMultiple Airlines
Deal found 27/8£471
Thu 4/910:45LGW - YOW
2 stops18h 37mWestJet
Thu 11/905:55YOW - LGW
2 stops22h 30mWestJet
Deal found 28/8£472
Sun 5/1010:45LGW - YOW
2 stops18h 37mWestJet
Thu 9/1005:55YOW - LGW
2 stops22h 30mWestJet
Deal found 28/8£473
Sun 5/1010:45LGW - YOW
2 stops18h 37mWestJet
Mon 20/1005:55YOW - LGW
2 stops22h 30mWestJet
Deal found 28/8£480
Wed 15/1010:45LGW - YOW
2 stops18h 37mWestJet
Mon 20/1005:55YOW - LGW
2 stops22h 30mWestJet
Deal found 27/8£480
Thu 18/917:40LHR - YOW
1 stop11h 42mMultiple Airlines
Thu 25/905:55YOW - LHR
1 stop24h 55mMultiple Airlines
Deal found 27/8£480
Sat 11/1014:55LGW - YOW
3 stops38h 27mMultiple Airlines
Fri 17/1010:50YOW - LGW
1 stop14h 30mMultiple Airlines
Deal found 27/8£482
Sat 11/1010:45LGW - YOW
2 stops18h 37mWestJet
Sat 18/1005:55YOW - LGW
2 stops22h 30mWestJet
Deal found 27/8£483
Sat 11/1019:40LGW - YOW
3 stops33h 42mMultiple Airlines
Sat 18/1011:50YOW - LGW
1 stop13h 30mMultiple Airlines
Deal found 27/8£484
Sat 27/912:40LHR - YOW
Nonstop7h 20mAir Canada
Sat 27/918:10YOW - LHR
1 stop21h 50mAir Canada
Deal found 27/8£484
Tue 7/1010:45LGW - YOW
2 stops18h 37mWestJet
Mon 20/1005:55YOW - LGW
2 stops22h 30mWestJet
Deal found 28/8£485
Thu 18/910:45LGW - YOW
2 stops18h 37mWestJet
Mon 22/905:55YOW - LGW
2 stops22h 30mWestJet
Deal found 26/8£486

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 29 August 2025.
Use the filters below to find and compare flights from London to Ottawa that are best for you.

Fly from

London

Fly to

Ottawa

Route

Depart

Return

Price

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 8/9

17:50-00:22

1 stop11h 32m

Ottawa

Tue 16/9

17:15-16:35

1 stop18h 20m

£471

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 5/10

10:45-00:22

2 stops18h 37m

Ottawa

Thu 9/10

05:55-09:25

2 stops22h 30m

£473

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 5/10

10:45-00:22

2 stops18h 37m

Ottawa

Mon 20/10

05:55-09:25

2 stops22h 30m

£480

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 18/9

17:40-00:22

1 stop11h 42m

Ottawa

Thu 25/9

05:55-11:50

1 stop24h 55m

£480

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 15/10

10:45-00:22

2 stops18h 37m

Ottawa

Mon 20/10

05:55-09:25

2 stops22h 30m

£480

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 11/10

14:55-00:22

3 stops38h 27m

Ottawa

Fri 17/10

10:50-06:20

1 stop14h 30m

£482

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 11/10

10:45-00:22

2 stops18h 37m

Ottawa

Sat 18/10

05:55-09:25

2 stops22h 30m

£483

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 27/9

12:40-15:00

Nonstop7h 20m

Ottawa

Sat 27/9

18:10-21:00

1 stop21h 50m

£484

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 17/10

17:50-00:22

1 stop11h 32m

Ottawa

Wed 22/10

05:55-06:25

2 stops19h 30m

£484

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 11/10

19:40-00:22

3 stops33h 42m

Ottawa

Sat 18/10

11:50-06:20

1 stop13h 30m

£484

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 60 results
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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

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 22 August 2025.

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, January is the cheapest month in which you can book a flight from London to Ottawa (average of £588). Flying from London to Ottawa in December is currently the most expensive (average of £875). 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 29 August 2025.

It’s typically best to fly out from London to Ottawa in the evening. Doing so could potentially save you 20% on the flight price compared to flying in the morning, which is usually more expensive.

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.

Toronto (YYZ) – chosen by Cheapflights users on 42% 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 £396.

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 Halifax (YHZ) have the shortest average one-way travel time for one-stop routes: 10h 09m.

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.

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 29 August 2025.
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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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.

Crew

8.5

Boarding

7.9

Entertainment

7.0

Comfort

7.3

Overall

7.7

Food

6.7

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 4 flights from London to Ottawa per day from 7 different airlines.

  • How long is the flight from London to Ottawa?

    WestJet, Air Canada, and KLM can get you from London to Ottawa in just under 7h 20m. Your travel time can differ by up to 11h 17m. 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 £302, was found to be the cheapest airline from London to Ottawa.Alternate airlines flying return to your destination include United Airlines and KLM. Users have found that Air Canada is 44% cheaper than the other options available to this destination.

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

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

    Consider Air Canada (88%), Aegean Airlines (88%) or Austrian Airlines (88%) 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 £2,524, our data indicates the cheapest price to be £425. The most popular route (London Heathrow - Ottawa), is priced around £379.

  • Where are the most common stopover locations when flying from London to Ottawa?

  • What are some popular things to do or see while on a stopover in Paris?

    Most Paris visitors opt to spend their time experiencing Eiffel Tower, Moulin Rouge, and Champs-Elysées. Eiffel Tower, Moulin Rouge and Champs-Elysées are located about 15.8 mi, 13.3 mi, and 14.7 mi, respectively from Paris Charles de Gaulle if you are interested in checking them out. Those landing in Paris looking to spend some time exploring during their stopover can hire a car for about £36 per day.

  • Where are the least popular stopover locations for London to Ottawa flights?

  • 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, January is the cheapest month in which you can book a flight from London to Ottawa (average of £588). Flying from London to Ottawa in December is currently the most expensive (average of £875). 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
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 29 August 2025.

Top 7 airlines flying from London to Ottawa

Discover the top 7 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 29 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£302Average£431FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£336Average£350FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£349Average£498FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£360Average£464FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£367Average£444FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapest£421Average£478FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£452Average£550FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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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