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Cheap flights from London to Ottawa from C$ 486

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
15 Jan — 22 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or March, booked 90 days in advance, depart on a Thursday or Tuesday 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 16 December 2025.

Fri 26/129:00 a.m.LHR - YOW
2 stops13h 40mMultiple Airlines
Sun 11/19:55 p.m.YOW - LHR
Nonstop6h 25mMultiple Airlines
Deal found 14/12C$ 896
Thu 25/1211:40 a.m.LGW - YOW
1 stop18h 01mAir Transat
Tue 13/16:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Deal found 14/12C$ 901
Thu 25/1211:40 a.m.LGW - YOW
1 stop11h 45mAir Transat
Mon 12/16:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Deal found 14/12C$ 903
Fri 26/129:00 a.m.LHR - YOW
2 stops13h 40mSWISS
Sun 11/16:20 p.m.YOW - LHR
2 stops14h 20mSWISS
Deal found 14/12C$ 925
Thu 25/1211:40 a.m.LGW - YOW
1 stop11h 45mAir Transat
Sat 10/16:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Deal found 14/12C$ 940
Mon 15/121:25 p.m.LHR - YOW
2 stops24h 58mAir Canada
Wed 14/19:55 p.m.YOW - LHR
Nonstop6h 25mAir Canada
Deal found 15/12C$ 962
Mon 15/121:25 p.m.LHR - YOW
2 stops24h 58mAir Canada
Tue 13/12:50 p.m.YOW - LHR
1 stop11h 20mAir Canada
Deal found 15/12C$ 966
Wed 24/121:00 p.m.LHR - YOW
1 stop15h 08mLufthansa
Sun 11/19:55 p.m.YOW - LHR
Nonstop6h 25mLufthansa
Deal found 14/12C$ 967
Wed 24/127:30 p.m.LHR - YOW
2 stops26h 20mMultiple Airlines
Wed 7/112:00 p.m.YOW - LHR
1 stop15h 30mMultiple Airlines
Deal found 14/12C$ 969
Wed 17/127:40 a.m.LHR - YOW
1 stop14h 32mAir Canada
Sun 11/19:55 p.m.YOW - LHR
Nonstop6h 25mAir Canada
Deal found 15/12C$ 987
Fri 26/1211:40 a.m.LGW - YOW
1 stop11h 45mAir Transat
Tue 13/16:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Deal found 14/12C$ 1,027
Wed 24/121:30 p.m.LCY - YOW
2 stops33h 10mSWISS
Sun 28/126:20 p.m.YOW - LCY
2 stops33h 20mSWISS
Deal found 14/12C$ 1,033

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 16 December 2025.

Round-trip from

C$ 889

One-way from

C$ 486

Popular in

August

Cheapest in

January

Average price

C$ 1,163

Good round-trip deal

C$ 878 or less
Lufthansa
  • Lufthansa
  • 25/2-1/3
  • 2 total stops
  • 39h 16m total
  • London to Ottawa
Search Deals
4/2
  • 4/2
  • 2 total stops
  • 35h 27m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (C$ 188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip 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 16 December 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

Fri 9/1

9:00 a.m.-2:21 p.m.

1 stop10h 21m

Ottawa

Sun 18/1

12:00 p.m.-8:35 p.m.

2 stops27h 35m

C$ 921

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/1

2:30 p.m.-12:42 a.m.

1 stop15h 12m

Ottawa

Sun 18/1

5:35 p.m.-10:30 a.m.

1 stop11h 55m

C$ 923

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 29/1

6:30 a.m.-3:10 p.m.

2 stops13h 40m

Ottawa

Thu 5/2

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

1 stop9h 35m

C$ 929

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 9/1

11:40 a.m.-12:43 a.m.

1 stop18h 03m

Ottawa

Sat 17/1

6:55 p.m.-9:45 a.m.

1 stop9h 50m

C$ 940

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 10/1

11:40 a.m.-8:25 a.m.

1 stop25h 45m

Ottawa

Tue 20/1

6:55 p.m.-9:45 a.m.

1 stop9h 50m

C$ 940

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 15/1

2:50 p.m.-2:22 p.m.

1 stop28h 32m

Ottawa

Thu 22/1

6:00 a.m.-12:50 p.m.

1 stop25h 50m

C$ 945

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 22/5

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

Nonstop8h 00m

Ottawa

Sun 31/5

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

Nonstop7h 15m

C$ 947

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 20/5

12:40 p.m.-8:01 p.m.

1 stop12h 21m

Ottawa

Sun 31/5

5:05 p.m.-10:45 a.m.

1 stop12h 40m

C$ 952

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 24/5

12:40 p.m.-8:01 p.m.

1 stop12h 21m

Ottawa

Mon 25/5

5:05 p.m.-10:45 a.m.

1 stop12h 40m

C$ 952

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 21/5

12:40 p.m.-8:01 p.m.

1 stop12h 21m

Ottawa

Sat 30/5

5:05 p.m.-7:55 a.m.

1 stop9h 50m

C$ 952

Flights are sorted by cheapest round-trip flights first.

Deals found on 16/12

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 12 December 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$ 478). Flying from London to Ottawa in December is currently the most expensive (average of C$ 696). 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 16 December 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.

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 48% 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$ 829.

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 8% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 231 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?

Friday 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 has had the lowest number of delays on this route, with just 8% 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 16 December 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
483 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

6.8

Boarding

7.9

Overall

7.8

Comfort

7.3

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
483 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

6.8

Boarding

7.9

Overall

7.8

Comfort

7.3

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
10,527 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

6.8

Boarding

7.9

Overall

7.8

Comfort

7.3

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
7,631 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

6.8

Boarding

7.9

Overall

7.8

Comfort

7.3

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. 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 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 10h 21m. Air Canada provides one of the quickest options available for as low as C$ 921. 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 Air France. Our recent data shows that you can find tickets from as low as C$ 792 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at C$ 798 and C$ 851 round-trip. These flights start at 20% 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 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: Aegean Airlines (100%), United Airlines (95%), TAP AIR PORTUGAL( 92%).

  • What are the cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 759. On average you can expect to pay C$ 982. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 676.

  • 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$ 478). Flying from London to Ottawa in December is currently the most expensive (average of C$ 696). 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
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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Heathrow to London flights
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Manchester to Hamilton flights
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East Midlands to Pierre Elliott Trudeau Intl flights
Darlington to Pierre Elliott Trudeau 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 16 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 792AverageC$ 1,073FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 798AverageC$ 1,014FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 851AverageC$ 1,001FlexibilityNo 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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