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Cheap flights from London to Ottawa from £205

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 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or February, booked 88 days in advance, depart on a Thursday or Monday and return on a Wednesday

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 11 July 2025.

Round-trip from

£454

One-way from

£205

Popular in

August

Cheapest in

January

Average price

£664

Good round-trip deal

£532 or less

Good one-way deal

£629 or less
4/9-8/9
  • 4/9-8/9
  • 3 total stops
  • 38h 47m total
  • London to Ottawa
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9/12
  • 9/12
  • 3 total stops
  • 38h 44m total
  • London to Ottawa
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Highest demand for flights based on searches. 15% potential increase in price (£73 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
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Average for round-trip flights in July 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

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 11 July 2025.

Thu 4/911:35LGW - YOW
2 stops17h 47mMultiple Airlines
Mon 8/905:55YOW - LGW
1 stop21h 00mMultiple Airlines
Deal found 9/7£454
Tue 9/1210:00LHR - YOW
2 stops19h 10mKLM
Wed 17/1217:20YOW - LHR
2 stops12h 25mKLM
Deal found 10/7£456
Mon 11/812:40LHR - YOW
1 stop15h 28mAir Canada
Mon 18/818:55YOW - LHR
Nonstop6h 35mAir Canada
Deal found 9/7£470
Wed 17/906:00LHR - YOW
2 stops23h 22mMultiple Airlines
Wed 24/905:55YOW - LHR
2 stops23h 25mMultiple Airlines
Deal found 10/7£489
Tue 15/707:45LHR - YOW
2 stops19h 20mUnited Airlines
Tue 22/709:50YOW - LHR
1 stop16h 05mUnited Airlines
Deal found 10/7£528
Tue 14/1006:50LHR - YOW
2 stops12h 01mBrussels Airlines
Thu 23/1018:40YOW - LHR
1 stop9h 55mBrussels Airlines
Deal found 9/7£534
Tue 30/922:35STN - YOW
2 stops30h 47mMultiple Airlines
Tue 7/1017:55YOW - STN
2 stops15h 25mMultiple Airlines
Deal found 10/7£538
Thu 17/706:15LHR - YOW
1 stop13h 50mAir France
Thu 24/717:15YOW - LHR
1 stop9h 45mAir France
Deal found 10/7£559
Tue 14/1008:45LCY - YOW
2 stops18h 19mMultiple Airlines
Thu 23/1011:55YOW - LCY
2 stops15h 25mMultiple Airlines
Deal found 9/7£567
Tue 9/1209:15LCY - YOW
2 stops15h 03mSWISS
Wed 17/1214:50YOW - LCY
2 stops12h 45mSWISS
Deal found 10/7£604
Tue 9/1211:40LGW - YOW
1 stop25h 37mAir Transat
Wed 17/1217:10YOW - LGW
1 stop11h 35mAir Transat
Deal found 10/7£607
Tue 30/909:20LCY - YOW
2 stops20h 02mKLM
Tue 7/1005:55YOW - LCY
2 stops20h 20mKLM
Deal found 10/7£731

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 11 July 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

LGW - YOW

LGWYOW

London Gatwick

Thu 4/9

11:35-00:22

2 stops17h 47m

Ottawa

Mon 8/9

05:55-07:55

1 stop21h 00m

£454

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 9/12

10:00-00:10

2 stops19h 10m

Ottawa

Wed 17/12

17:20-10:45

2 stops12h 25m

£456

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 11/8

12:40-23:08

1 stop15h 28m

Ottawa

Mon 18/8

18:55-06:30

Nonstop6h 35m

£470

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 17/9

06:00-00:22

2 stops23h 22m

Ottawa

Wed 24/9

05:55-10:20

2 stops23h 25m

£489

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 14/10

06:50-13:51

2 stops12h 01m

Ottawa

Thu 23/10

18:40-09:35

1 stop9h 55m

£534

LondonOttawa

STN - YOW

STNYOW

London Stansted

Tue 30/9

22:35-00:22

2 stops30h 47m

Ottawa

Tue 7/10

17:55-14:20

2 stops15h 25m

£538

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 8/12

07:40-23:08

2 stops20h 28m

Ottawa

Tue 23/12

16:00-07:10

1 stop10h 10m

£539

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 8/8

06:40-16:43

2 stops15h 03m

Ottawa

Wed 13/8

14:45-09:20

2 stops13h 35m

£557

LondonOttawa

LCY - YOW

LCYYOW

London City

Tue 14/10

08:45-22:04

2 stops18h 19m

Ottawa

Thu 23/10

11:55-08:20

2 stops15h 25m

£567

LondonOttawa

LCY - YOW

LCYYOW

London City

Tue 9/12

09:15-19:18

2 stops15h 03m

Ottawa

Wed 17/12

14:50-08:35

2 stops12h 45m

£604

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Showing 1-10 of 29 results
1
2
3

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 27 June 2025.

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 88 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, January is the cheapest month in which you can book a flight from London to Ottawa (average of £588). Flying from London to Ottawa in December is currently the most expensive (average of £875). 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 11 July 2025.

It’s typically best to fly out from London to Ottawa in the evening. Doing so could potentially save you 18% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from London to Ottawa?

Use this chart to determine the cheapest time to fly return from London to Ottawa. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Ottawa flight should consider departing on Monday evenings when fares are most often at their lowest. Wednesday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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

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 11 July 2025.
Check out reviews from past customers who have flown with KLM, Air Transat, andSWISS 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.
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,372 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Air Transat
7.8
Good
412 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
SWISS
7.5
Good
1,655 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
United Airlines
7.4
Good
8,848 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Brussels Airlines
7.3
Good
349 reviews
KLM
7.8
Good
1,372 reviews
Check prices

Crew

8.4

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Overall

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 4 flights from London to Ottawa per day from 7 different airlines.

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

    KLM, at £456, was found to be the cheapest airline from London to Ottawa.Alternate airlines flying return to your destination include Air Canada and Brussels Airlines. Users have found that KLM is 16% 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 £337. Users have also found prices from £425 and £441 on Air Transat and Aer Lingus, 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 Air Canada (94%), Aegean Airlines (94%) or Austrian Airlines (94%) 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 £655, our data indicates the cheapest price to be £478. The most popular route (London Heathrow - Ottawa), is priced around £378.

  • 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 Toronto 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, Moulin Rouge, and Champs-Elysées. Eiffel Tower, Moulin Rouge and Champs-Elysées are located about 15.8 mi, 13.3 mi, and 14.7 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 £42 per day.

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

    The majority of Toronto visitors spend their time at Union Station, CN Tower, and TIFF Bell Lightbox. Union Station, CN Tower, and TIFF Bell Lightbox can be visited by travelling about 12.1 mi, 11.9 mi, and 11.6 mi respectively from Toronto Pearson Intl. Those looking to explore during their stopover in Toronto can hire a car from Toronto Pearson Intl for about £38 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 Montreal.

  • 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, January is the cheapest month in which you can book a flight from London to Ottawa (average of £588). Flying from London to Ottawa in December is currently the most expensive (average of £875). 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

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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 11 July 2025.
Air Canada flights from London to Ottawa
Air Transat flights from London to Ottawa
Lufthansa 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£301Average£430FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£332Average£348FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£353Average£467FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapest£361Average£496FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£373Average£444FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapest£407Average£472FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£445Average£556FlexibilityNo 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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