Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Ottawa from £264

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
17 Jan — 24 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 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 18 December 2025.

Mon 29/1209:00LHR - YOW
1 stop13h 43mAir Canada
Wed 7/116:40YOW - LHR
1 stop22h 55mAir Canada
Deal found 17/12£541
Mon 29/1209:00LHR - YOW
2 stops31h 20mAir Canada
Mon 5/119:55YOW - LHR
1 stop30h 15mAir Canada
Deal found 17/12£547
Wed 17/1216:20LHR - YOW
1 stop12h 34mAir Canada
Mon 22/1219:27YOW - LHR
1 stop30h 13mAir Canada
Deal found 16/12£559
Sun 28/1207:40LHR - YOW
2 stops22h 58mAir Canada
Wed 7/116:40YOW - LHR
1 stop22h 55mAir Canada
Deal found 17/12£568
Wed 17/1216:20LHR - YOW
2 stops26h 12mUnited Airlines
Mon 22/1219:27YOW - LHR
1 stop30h 13mUnited Airlines
Deal found 16/12£579
Tue 30/1213:25LHR - YOW
1 stop13h 55mAir Canada
Wed 7/116:40YOW - LHR
1 stop22h 55mAir Canada
Deal found 17/12£583
Sun 28/1207:40LHR - YOW
2 stops22h 58mAir Canada
Mon 5/117:59YOW - LHR
1 stop21h 36mAir Canada
Deal found 17/12£585
Tue 30/1209:15LCY - YOW
2 stops13h 25mSWISS
Tue 6/110:45YOW - LCY
2 stops17h 00mSWISS
Deal found 17/12£787
Fri 26/1218:55STN - YOW
2 stops26h 56mMultiple Airlines
Fri 2/106:45YOW - STN
2 stops24h 35mMultiple Airlines
Deal found 16/12£837
Mon 29/1207:10STN - YOW
3 stops46h 32mMultiple Airlines
Mon 5/115:55YOW - STN
3 stops17h 25mMultiple Airlines
Deal found 17/12£847
Mon 29/1209:15LCY - YOW
2 stops15h 03mSWISS
Tue 6/110:45YOW - LCY
2 stops17h 00mSWISS
Deal found 17/12£870
Wed 31/1209:20LCY - YOW
2 stops13h 20mSWISS
Tue 6/110:45YOW - LCY
2 stops17h 00mSWISS
Deal found 17/12£888

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 18 December 2025.

Round-trip from

£483

One-way from

£264

Popular in

August

Cheapest in

January

Average price

£632

Good round-trip deal

£503 or less

Good one-way deal

£520 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 (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 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 18 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

Wed 25/2

13:25-17:16

2 stops32h 51m

Ottawa

Sun 1/3

21:55-09:20

Nonstop6h 25m

£483

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 1/2

11:40-00:43

1 stop18h 03m

Ottawa

Sun 8/2

06:45-09:45

1 stop22h 00m

£493

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 25/2

12:00-14:30

Nonstop7h 30m

Ottawa

Wed 4/3

10:30-07:10

2 stops15h 40m

£497

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 24/1

14:00-23:58

1 stop14h 58m

Ottawa

Mon 2/2

09:30-10:00

1 stop19h 30m

£497

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 23/1

13:25-01:38

2 stops17h 13m

Ottawa

Sun 25/1

21:55-09:20

Nonstop6h 25m

£502

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/1

14:30-00:42

1 stop15h 12m

Ottawa

Fri 16/1

17:35-18:20

1 stop19h 45m

£502

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 29/4

12:40-01:34

2 stops17h 54m

Ottawa

Wed 6/5

21:00-08:35

Nonstop6h 35m

£513

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sun 1/2

12:00-14:30

Nonstop7h 30m

Ottawa

Sun 8/2

21:55-09:20

Nonstop6h 25m

£521

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 29/4

06:30-21:14

2 stops19h 44m

Ottawa

Wed 6/5

12:00-10:40

2 stops17h 40m

£529

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 24/1

11:55-00:42

2 stops17h 47m

Ottawa

Sun 25/1

10:00-10:55

2 stops19h 55m

£529

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 60 results
1
2
3
...
6

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 12 December 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 £259). Flying from London to Ottawa in December is currently the most expensive (average of £378). 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 18 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.

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 43% 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 £451.

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 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 have 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 18 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
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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
483 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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
1,507 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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
10,534 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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
7,635 reviews
Air Transat
7.8
Good
483 reviews
Check prices

Food

6.8

Entertainment

7.1

Comfort

7.3

Crew

8.4

Overall

7.8

Boarding

7.9

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 is 1 flight from London to Ottawa per day from 7 different airlines.

  • How long is the flight from London to Ottawa?

    Air Transat, Air Canada, and SWISS can get you from London to Ottawa in just under 7h 30m. Your travel time can differ by up to 10h 33m. 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 £305, 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 £278. Users have also found prices from £292 and £520 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 (95%) or TAP AIR PORTUGAL (92%) 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 £2,458, our data indicates the cheapest price to be £418. The most popular route (London Heathrow - Ottawa), is priced around £363.

  • 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 £33 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 £259). Flying from London to Ottawa in December is currently the most expensive (average of £378). 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
Brockville
Smiths Falls

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 18 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 18 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£305Average£427FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£337Average£354FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£353Average£418FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£364Average£502FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£374Average£443FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapest£410Average£477FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£453Average£539FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.