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Cheap flights from London to Ottawa from C$ 480

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

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

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 30 October 2025.

Round-trip from

C$ 785

One-way from

C$ 480

Popular in

August

Cheapest in

January

Average price

C$ 1,012

Good round-trip deal

C$ 891 or less

Good one-way deal

C$ 1,027 or less
29/1-2/2
  • 29/1-2/2
  • 2 total stops
  • 34h 28m total
  • London to Ottawa
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16/1
  • 16/1
  • 1 total stop
  • 14h 58m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 202 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 49 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from London (LON) to Ottawa.
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Price to beat on a one-way flight from London (LON) to Ottawa.
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Find 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 30 October 2025.

Thu 27/116:20 a.m.LHR - YOW
1 stop13h 50mAir France
Thu 4/125:20 p.m.YOW - LHR
1 stop9h 35mAir France
Deal found 30/10C$ 848
Thu 27/116:50 a.m.LHR - YOW
2 stops12h 17mAir Canada
Thu 4/1210:30 a.m.YOW - LHR
2 stops15h 40mAir Canada
Deal found 30/10C$ 852
Wed 12/111:25 p.m.LHR - YOW
2 stops32h 51mAir Canada
Thu 20/118:00 p.m.YOW - LHR
2 stops19h 35mAir Canada
Deal found 29/10C$ 857
Wed 26/117:25 p.m.LHR - YOW
2 stops26h 53mAustrian Airlines
Wed 3/127:25 p.m.YOW - LHR
1 stop10h 55mAustrian Airlines
Deal found 29/10C$ 864
Sun 7/129:00 a.m.LHR - YOW
1 stop10h 21mAir Canada
Mon 15/1210:20 a.m.YOW - LHR
2 stops15h 50mAir Canada
Deal found 30/10C$ 869
Fri 28/119:00 a.m.LHR - YOW
2 stops15h 18mAir Canada
Fri 5/1210:20 a.m.YOW - LHR
2 stops15h 50mAir Canada
Deal found 29/10C$ 870
Tue 23/127:20 p.m.LHR - YOW
1 stop24h 50mAir France
Sun 11/15:45 p.m.YOW - LHR
1 stop11h 45mAir France
Deal found 29/10C$ 871
Fri 28/111:25 p.m.LHR - YOW
2 stops32h 51mMultiple Airlines
Fri 5/129:55 p.m.YOW - LHR
Nonstop6h 25mMultiple Airlines
Deal found 29/10C$ 873
Wed 26/119:00 a.m.LHR - YOW
2 stops15h 18mMultiple Airlines
Wed 3/1210:30 a.m.YOW - LHR
2 stops15h 40mMultiple Airlines
Deal found 29/10C$ 885
Wed 5/111:25 p.m.LHR - YOW
2 stops30h 58mMultiple Airlines
Wed 19/119:55 p.m.YOW - LHR
Nonstop6h 25mMultiple Airlines
Deal found 29/10C$ 890
Thu 27/1111:40 a.m.LGW - YOW
1 stop11h 44mAir Transat
Thu 4/126:45 a.m.YOW - LGW
1 stop22h 00mAir Transat
Deal found 30/10C$ 891
Wed 26/1111:40 a.m.LGW - YOW
1 stop25h 44mAir Transat
Wed 3/123:00 p.m.YOW - LGW
1 stop13h 45mAir Transat
Deal found 29/10C$ 895

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 30 October 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

Thu 5/3

6:20 a.m.-3:10 p.m.

1 stop13h 50m

Ottawa

Tue 10/3

6:20 p.m.-8:00 a.m.

1 stop9h 40m

C$ 860

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 10/12

9:00 a.m.-3:10 p.m.

1 stop11h 10m

Ottawa

Wed 24/12

5:20 p.m.-10:30 a.m.

1 stop12h 10m

C$ 881

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 12/11

5:35 p.m.-3:10 p.m.

1 stop26h 35m

Ottawa

Thu 20/11

5:20 p.m.-8:00 a.m.

1 stop9h 40m

C$ 898

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 10/12

2:45 p.m.-12:42 a.m.

2 stops14h 57m

Ottawa

Wed 24/12

5:20 p.m.-8:00 a.m.

1 stop9h 40m

C$ 901

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 25/12

11:40 a.m.-6:25 p.m.

1 stop11h 45m

Ottawa

Sat 17/1

8:30 a.m.-9:45 a.m.

1 stop20h 15m

C$ 912

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 26/12

11:40 a.m.-6:25 p.m.

1 stop11h 45m

Ottawa

Fri 16/1

6:45 a.m.-9:45 a.m.

1 stop22h 00m

C$ 912

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 13/4

2:05 p.m.-4:40 p.m.

Nonstop7h 35m

Ottawa

Sun 26/4

6:00 a.m.-6:30 a.m.

2 stops19h 30m

C$ 915

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 21/11

1:25 p.m.-1:38 a.m.

2 stops17h 13m

Ottawa

Wed 28/1

5:45 a.m.-7:10 a.m.

1 stop20h 25m

C$ 922

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 11/3

1:25 p.m.-8:18 a.m.

2 stops22h 53m

Ottawa

Sun 15/3

10:55 p.m.-9:20 a.m.

Nonstop6h 25m

C$ 924

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 11/3

11:40 a.m.-4:51 p.m.

1 stop33h 11m

Ottawa

Sun 15/3

10:00 a.m.-9:45 a.m.

1 stop19h 45m

C$ 937

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

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 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.

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 round-trip flight from London to Ottawa. Price data was last updated on 24 October 2025.

The price you pay for your flight from London to Ottawa may vary depending on when you book. For the best chance of a lower fare, look to book 90 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, May is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 485). Flying from London to Ottawa in December is currently the most expensive (average of C$ 737). 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 30 October 2025.

A simple way to save on the total cost of your ticket is to fly from London to Ottawa in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from London to Ottawa?

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

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

Paris (CDG) – chosen by Cheapflights users on 45% of one-stop itineraries from London to Ottawa on Cheapflights.

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

Average round-trip fare for 1-stop flights from London to Ottawa, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 857.

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

Shortest average travel time for 1-stop one-way flights from London to Ottawa, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 9h 14m.

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

Average layover duration for 1-stop one-way flights from London to Ottawa, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 23m.

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 30 October 2025.
Check out reviews from past customers who have flown with Air Transat,Air Canada, andLufthansa 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
469 reviews
Check prices

Comfort

7.4

Entertainment

7.1

Food

6.8

Overall

7.8

Boarding

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Transat
7.8
Good
469 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Comfort

7.4

Entertainment

7.1

Food

6.8

Overall

7.8

Boarding

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Canada
7.1
Good
10,381 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Comfort

7.4

Entertainment

7.1

Food

6.8

Overall

7.8

Boarding

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Lufthansa
6.8
Okay
7,541 reviews
Air Transat
7.8
Good
469 reviews
Check prices

Comfort

7.4

Entertainment

7.1

Food

6.8

Overall

7.8

Boarding

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.

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?

    Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly into when you book flights from London to Ottawa. 4 airlines have flights to Ottawa from London on a regular basis. Booking flights from London to Ottawa should not be difficult; the airport handles an average of 0 inbound flights from London per day.

  • How long is the flight from London to Ottawa?

    A quick flight from London to Ottawa can take about 11h 10m. Air France provides one of the quickest options available for as low as C$ 881. Airlines will cover a distance of 5343 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Our cheapest airline available from London to Ottawa is Virgin Atlantic. Our recent data shows that you can find tickets from as low as C$ 636 on this airline. Additional options worth looking into are Air France and Air Canada, starting at C$ 804 and C$ 810 round-trip. These flights start at 37% lower than the current average price 3 months from now.

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

    C$ 519 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on Air France and KLM, with prices starting from C$ 550 and C$ 635, 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 City - Ottawa as they are the most popular.

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

    Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (80%), Aegean Airlines (80%), Austrian Airlines( 80%).

  • What are the cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 891. On average you can expect to pay C$ 1,051. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 846.

  • 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 vacation 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, May is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 485). Flying from London to Ottawa in December is currently the most expensive (average of C$ 737). 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
Perth
Prescott
Pembroke
Wakefield

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Alternative routes for London to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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Stansted to Ottawa flights
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Manchester to Ottawa flights
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Top 4 airlines flying from London to Ottawa

Discover the top 4 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 629,999 searches. Data last updated 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 636AverageC$ 823FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 804AverageC$ 1,052FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 810AverageC$ 1,035FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 863AverageC$ 1,016FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

When you search for this flight from London to Ottawa, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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?

Yes! Start tracking prices for London to Ottawa 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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