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Cheap flights from London to Ottawa from £237

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
3 Jan — 10 Jan1
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 Friday or Monday and return on a Monday

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 4 December 2025.

Tue 9/1207:40LHR - YOW
2 stops15h 58mMultiple Airlines
Tue 17/314:05YOW - LHR
2 stops37h 05mMultiple Airlines
Deal found 2/12£479
Thu 25/1211:40LGW - YOW
1 stop11h 45mAir Transat
Sat 10/118:55YOW - LGW
1 stop9h 50mAir Transat
Deal found 3/12£488
Mon 8/1209:00LHR - YOW
1 stop10h 21mAir Canada
Mon 23/210:30YOW - LHR
2 stops15h 40mAir Canada
Deal found 3/12£490
Tue 9/1209:00LHR - YOW
2 stops19h 08mAir Canada
Thu 26/212:15YOW - LHR
1 stop27h 20mAir Canada
Deal found 2/12£494
Tue 9/1213:25LHR - YOW
2 stops25h 21mMultiple Airlines
Thu 26/214:05YOW - LHR
1 stop13h 25mMultiple Airlines
Deal found 3/12£494
Thu 25/1211:40LGW - YOW
1 stop11h 45mAir Transat
Tue 13/118:55YOW - LGW
1 stop9h 50mAir Transat
Deal found 3/12£507
Fri 26/1212:00LHR - YOW
Nonstop7h 30mAir Canada
Wed 7/116:40YOW - LHR
1 stop22h 55mAir Canada
Deal found 3/12£507
Sun 14/1209:00LHR - YOW
2 stops21h 38mAir Canada
Wed 14/121:55YOW - LHR
Nonstop6h 25mAir Canada
Deal found 3/12£517
Thu 25/1206:50LHR - YOW
2 stops15h 00mAir Canada
Wed 7/116:40YOW - LHR
1 stop22h 55mAir Canada
Deal found 2/12£518
Wed 24/1212:00LHR - YOW
Nonstop7h 30mLufthansa
Fri 9/116:00YOW - LHR
1 stop10h 10mLufthansa
Deal found 3/12£518
Thu 4/1211:40LGW - YOW
1 stop18h 01mAir Transat
Thu 11/1215:00YOW - LGW
1 stop13h 45mAir Transat
Deal found 1/12£521
Thu 25/1211:40LGW - YOW
1 stop11h 45mAir Transat
Sun 11/118:55YOW - LGW
1 stop9h 50mAir Transat
Deal found 3/12£529

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 4 December 2025.

Round-trip from

£478

One-way from

£237

Popular in

August

Cheapest in

January

Average price

£636

Good round-trip deal

£519 or less

Good one-way deal

£523 or less
Air Canada
  • Air Canada
  • 25/2-4/3
  • Nonstop
  • 13h 55m total
  • London to Ottawa
Search Deals
2/2
  • 2/2
  • 2 total stops
  • 38h 08m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return 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
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 4 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

LCY - YOW

LCYYOW

London City

Wed 14/1

09:20-19:18

2 stops14h 58m

Ottawa

Wed 21/1

16:15-12:55

2 stops15h 40m

£479

LondonOttawa

STN - YOW

STNYOW

London Stansted

Fri 13/3

21:45-00:39

2 stops30h 54m

Ottawa

Fri 20/3

05:40-20:05

2 stops34h 25m

£484

LondonOttawa

LCY - YOW

LCYYOW

London City

Wed 4/2

09:50-17:18

2 stops36h 28m

Ottawa

Sun 8/2

18:05-17:40

2 stops18h 35m

£487

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 30/1

11:40-18:28

1 stop11h 48m

Ottawa

Thu 5/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 4/2

11:40-18:28

1 stop11h 48m

Ottawa

Fri 6/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 29/1

11:40-18:28

1 stop11h 48m

Ottawa

Fri 6/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 30/1

11:40-18:28

1 stop11h 48m

Ottawa

Fri 6/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 29/1

11:40-18:28

1 stop11h 48m

Ottawa

Tue 3/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 1/2

11:40-18:28

1 stop11h 48m

Ottawa

Mon 9/2

18:55-09:45

1 stop9h 50m

£488

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 27/4

12:40-00:41

1 stop17h 01m

Ottawa

Sun 10/5

14:20-10:45

1 stop15h 25m

£491

Flights are sorted by cheapest return flights first.

Deals found on 3/12

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 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 28 November 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, May is the cheapest month in which you can book a flight from London to Ottawa (average of £261). Flying from London to Ottawa in December is currently the most expensive (average of £394). 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 4 December 2025.

It’s typically best to fly out from London to Ottawa in the evening. Doing so could potentially save you 30% on the flight price compared to flying at midday, which is usually more expensive.

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

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 44% 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.

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £517.

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 58m.

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.

How often are flights from London to Ottawa delayed?

About 9% 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?

Thursday 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 have had the lowest number of delays on this route, with just 9% 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 4 December 2025.
Check out reviews from past customers who have flown with Air Transat, Virgin Atlantic, andAir France 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
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
480 reviews
Air Transat
7.8
Good
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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.
Virgin Atlantic
7.5
Good
675 reviews
Air Transat
7.8
Good
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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 France
7.4
Good
1,500 reviews
Air Transat
7.8
Good
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
10,497 reviews
Air Transat
7.8
Good
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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
7,607 reviews
Air Transat
7.8
Good
480 reviews
Check prices

Boarding

7.9

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Sept 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?

    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 7 different airlines.

  • How long is the flight from London to Ottawa?

    SWISS, Lufthansa, and Air Transat can get you from London to Ottawa in just under 11h 48m. Your travel time can differ by up to 24h 40m. Airlines will cover a distance of 3340 mi. This flight may include one or multiple stops.

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

    Air Canada, at £307, 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 43% 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 WestJet. According to our data, you can fly for as low as £280. Users have also found prices from £294 and £523 on Virgin Atlantic and Lufthansa, 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?

    Consider Aegean Airlines (100%), United Airlines (97%) or Air Canada (96%) 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 £2,502, our data indicates the cheapest price to be £451. The most popular route (London Heathrow - Ottawa), is priced around £391.

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

    London to Ottawa flights have a stopover in Paris most of the time. Paris is followed by Montreal in terms of the most popular stopover location on flights 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, Champs-Elysées, and Louvre Museum. Eiffel Tower, Champs-Elysées and Louvre Museum are located about 15.8 mi, 14.7 mi, and 14.3 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 £31 per day.

  • What are some popular points of interest to see during a stopover in Montreal?

    The majority of Montreal visitors spend their time at Notre-Dame Basilica, Chapelle Notre-Dame-de-Bon-Secours, and Place des Arts. Notre-Dame Basilica, Chapelle Notre-Dame-de-Bon-Secours, and Place des Arts can be visited by travelling about 9.9 mi, 10.2 mi, and 9.5 mi respectively from Montreal Pierre Elliott Trudeau Intl. Those looking to explore during their stopover in Montreal can hire a car from Montreal Pierre Elliott Trudeau Intl for about £30 per day.

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

    The least popular stopover on flights from London to Ottawa is Toronto.

  • 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, May is the cheapest month in which you can book a flight from London to Ottawa (average of £261). Flying from London to Ottawa in December is currently the most expensive (average of £394). 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 4 December 2025.
Air Canada flights from London to Ottawa
Lufthansa flights from London to Ottawa
Air Transat flights from London to Ottawa

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 4 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£307Average£431FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£339Average£356FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£355Average£448FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£365Average£490FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£373Average£445FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapest£412Average£485FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£457Average£545FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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