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Cheap flights from London to Ottawa from C$ 364

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
16 Apr — 23 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 Sunday or Saturday and return on a Tuesday

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 17 March 2026.

Tue 16/69:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Fri 26/67:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 12/3C$ 657
Tue 2/69:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Fri 12/67:15 p.m.
YOW
-
LGW
1 stop10h 30m
Air Transat
Deal found 12/3C$ 668
Fri 5/69:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Tue 9/67:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 16/3C$ 675
Fri 22/59:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Mon 1/64:00 p.m.
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 16/3C$ 678
Fri 19/69:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Fri 3/72:15 p.m.
YOW
-
LGW
1 stop14h 35m
Air Transat
Deal found 14/3C$ 682
Mon 1/612:40 p.m.
LGW
-
YOW
1 stop16h 45m
Air Transat
Mon 8/64:00 p.m.
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 16/3C$ 683
Fri 18/99:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Mon 28/97:00 a.m.
YOW
-
LGW
1 stop22h 45m
Air Transat
Deal found 15/3C$ 686
Mon 14/99:40 a.m.
LGW
-
YOW
1 stop19h 45m
Air Transat
Sat 26/98:40 a.m.
YOW
-
LGW
1 stop18h 15m
Air Transat
Deal found 15/3C$ 687
Thu 4/68:05 p.m.
LHR
-
YOW
2 stops26h 06m
Multiple Airlines
Tue 9/63:00 p.m.
YOW
-
LHR
1 stop10h 30m
Multiple Airlines
Deal found 16/3C$ 752
Wed 17/62:10 p.m.
LHR
-
YOW
Nonstop7h 55m
Air Canada
Wed 24/69:00 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 16/3C$ 754
Fri 15/512:40 p.m.
LHR
-
YOW
1 stop11h 13m
Air Canada
Thu 28/56:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 16/3C$ 756
Fri 22/512:40 p.m.
LHR
-
YOW
1 stop11h 13m
Air Canada
Mon 1/67:30 p.m.
YOW
-
LHR
1 stop9h 30m
Air Canada
Deal found 16/3C$ 757

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 17 March 2026.

Round-trip from

C$ 657

One-way from

C$ 364

Popular in

August

Cheapest in

June

Average price

C$ 1,053

Good round-trip deal

C$ 726 or less

Good one-way deal

C$ 1,292 or less
Air Transat
  • Air Transat
  • 16/6-26/6
  • Nonstop
  • 15h 15m total
  • London to Ottawa
Search Deals
26/4
  • 26/4
  • 3 total stops
  • 41h 55m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT 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

 
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 17 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 round-trip

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 4/6

6:55 a.m.-6:48 p.m.

2 stops16h 53m

Ottawa

Thu 11/6

5:20 p.m.-9:35 p.m.

2 stops23h 15m

C$ 832

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/6

6:50 a.m.-4:38 p.m.

2 stops14h 48m

Ottawa

Tue 9/6

10:44 a.m.-5:55 a.m.

2 stops14h 11m

C$ 832

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 15/5

7:30 a.m.-9:35 p.m.

2 stops19h 05m

Ottawa

Sat 30/5

3:10 p.m.-7:15 a.m.

1 stop11h 05m

C$ 835

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 16/5

6:50 a.m.-6:55 p.m.

2 stops17h 05m

Ottawa

Wed 27/5

10:44 a.m.-6:45 a.m.

1 stop15h 01m

C$ 837

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 2/7

12:40 p.m.-12:25 a.m.

1 stop16h 45m

Ottawa

Wed 22/7

8:40 a.m.-7:55 a.m.

1 stop18h 15m

C$ 976

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 26/6

6:50 a.m.-6:48 p.m.

2 stops16h 58m

Ottawa

Wed 1/7

3:10 p.m.-10:40 a.m.

2 stops14h 30m

C$ 994

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 15/6

7:30 a.m.-10:03 a.m.

2 stops31h 33m

Ottawa

Sun 21/6

5:20 p.m.-9:35 p.m.

2 stops23h 15m

C$ 1,030

LondonOttawa

STN - YOW

STNYOW

London Stansted

Thu 4/6

6:30 a.m.-12:20 a.m.

3 stops22h 50m

Ottawa

Thu 11/6

6:25 p.m.-5:10 p.m.

2 stops17h 45m

C$ 1,056
Quickest round-trip

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 9/8

9:40 a.m.-12:40 p.m.

Nonstop8h 00m

Ottawa

Sun 23/8

7:40 p.m.-7:55 a.m.

Nonstop7h 15m

C$ 1,056

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 16/4

6:30 a.m.-2:55 p.m.

2 stops13h 25m

Ottawa

Sun 19/4

5:20 p.m.-7:55 a.m.

1 stop9h 35m

C$ 1,058

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 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 13 March 2026.

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, September is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 522). Flying from London to Ottawa in December is currently the most expensive (average of C$ 706). 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 17 March 2026.

When flying from London to Ottawa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 40% 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$ 843.

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.

How often are flights from London to Ottawa delayed?

About 10% 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 Friday 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 has had the lowest number of delays on this route, with just 10% 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 17 March 2026.
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
7.7
Good
521 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.7

Entertainment

7.0

Food

6.8

Boarding

7.9

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

Comfort

7.3

Crew

8.5

Overall

7.7

Entertainment

7.0

Food

6.8

Boarding

7.9

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
10,811 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.7

Entertainment

7.0

Food

6.8

Boarding

7.9

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
7,858 reviews
Air Transat
7.7
Good
521 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.7

Entertainment

7.0

Food

6.8

Boarding

7.9

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?

    Ottawa (YOW), located 10.6 km from the city centre, is the airport you fly into when you book flights from London to Ottawa. 3 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 2 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 15h 21m. United Airlines provides one of the quickest options available for as low as C$ 1,119. Airlines will cover a distance of 5374 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 Lufthansa. Our recent data shows that you can find tickets from as low as C$ 726 on this airline. Additional options worth looking into are Air France and Air Canada, starting at C$ 788 and C$ 789 round-trip. These flights start at 28% lower than the current average price 3 months from now.

  • 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?

    Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (89%), Austrian Airlines (89%), SriLankan Airlines( 89%).

  • What are the cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 726. On average you can expect to pay C$ 894. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 752.

  • 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, September is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 522). Flying from London to Ottawa in December is currently the most expensive (average of C$ 706). 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
Perth
Wakefield
Pembroke
Smiths Falls

Browse thousands of different options on Cheapflights for your next trip

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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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Gatwick to Pearson Intl flights
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Birmingham to Pierre Elliott Trudeau Intl flights
Heathrow to Ottawa flights
Southend to Pierre Elliott Trudeau Intl flights
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Manchester to Pierre Elliott Trudeau Intl flights
Edinburgh to Pierre Elliott Trudeau Intl flights
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Southampton to Pierre Elliott Trudeau Intl flights
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Heathrow to Hamilton flights
Liverpool to Pierre Elliott Trudeau Intl flights
Gatwick to Hamilton flights
Leeds to Pierre Elliott Trudeau Intl flights
Darlington to Pierre Elliott Trudeau Intl flights
East Midlands to Pierre Elliott Trudeau Intl flights
Norwich to Pierre Elliott Trudeau Intl flights
Darlington to Pearson Intl flights

Top 3 airlines flying from London to Ottawa

Discover the top 3 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 17 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapestC$ 726AverageC$ 941FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapestC$ 788AverageC$ 1,325FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 789AverageC$ 993FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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