Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Ottawa from £225

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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
22 Apr — 29 Apr1
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 Monday or Thursday and return on a Tuesday

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 17 April 2025.

Round-trip from

£312

One-way from

£225

Popular in

August

Cheapest in

January

Average price

£534

Good round-trip deal

£446 or less
Air Canada
  • Air Canada
  • 12/5-22/5
  • 3 total stops
  • 43h 45m total
  • London to Ottawa
Search Deals
7/5
  • 7/5
  • 3 total stops
  • 47h 20m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£79 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Ottawa.
Search Deals

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 17 April 2025.

Mon 12/509:30LHR - YOW
2 stops15h 45mAir Canada
Thu 22/512:00YOW - LHR
1 stop28h 00mAir Canada
Deal found 16/4£312
Fri 2/506:50LHR - YOW
2 stops32h 08mUnited Airlines
Sun 4/505:15YOW - LHR
2 stops20h 40mUnited Airlines
Deal found 16/4£330
Sun 15/609:40LGW - YOW
1 stop19h 42mMultiple Airlines
Tue 17/605:55YOW - LGW
2 stops22h 55mMultiple Airlines
Deal found 17/4£410
Mon 12/519:45LHR - YOW
1 stop24h 20mAir France
Mon 26/517:15YOW - LHR
1 stop18h 20mAir France
Deal found 16/4£410
Thu 24/419:30LHR - YOW
2 stops31h 04mAustrian Airlines
Mon 5/519:55YOW - LHR
1 stop29h 40mAustrian Airlines
Deal found 16/4£458
Mon 12/509:30LHR - YOW
1 stop17h 37mLufthansa
Thu 22/518:55YOW - LHR
Nonstop6h 35mLufthansa
Deal found 16/4£464
Sat 3/512:40LGW - YOW
1 stop16h 41mAir Transat
Mon 12/514:20YOW - LGW
1 stop15h 25mAir Transat
Deal found 16/4£471
Wed 3/907:00LHR - YOW
2 stops18h 14mSWISS
Mon 15/918:40YOW - LHR
2 stops21h 50mSWISS
Deal found 16/4£475
Wed 14/507:00LHR - YOW
3 stops22h 22mMultiple Airlines
Wed 21/505:55YOW - LHR
2 stops34h 50mMultiple Airlines
Deal found 16/4£486
Thu 8/509:25LCY - YOW
2 stops19h 57mMultiple Airlines
Mon 19/506:05YOW - LCY
2 stops25h 25mMultiple Airlines
Deal found 16/4£496
Wed 3/918:35LGW - YOW
2 stops33h 29mSWISS
Tue 16/913:55YOW - LGW
2 stops22h 55mSWISS
Deal found 17/4£502
Thu 12/607:35STN - YOW
3 stops36h 29mMultiple Airlines
Mon 16/609:00YOW - STN
2 stops24h 00mMultiple Airlines
Deal found 16/4£513

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 17 April 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 3/9

09:30-20:17

2 stops15h 47m

Ottawa

Wed 17/9

21:00-08:35

Nonstop6h 35m

£313

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 2/5

06:50-09:58

2 stops32h 08m

Ottawa

Sun 4/5

05:15-06:55

2 stops20h 40m

£330

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 15/6

09:40-00:22

1 stop19h 42m

Ottawa

Tue 17/6

05:55-09:50

2 stops22h 55m

£410

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

19:45-15:05

1 stop24h 20m

Ottawa

Mon 26/5

17:15-16:35

1 stop18h 20m

£410

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 2/5

06:00-17:04

2 stops40h 04m

Ottawa

Sun 11/5

15:55-16:25

2 stops19h 30m

£458

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

09:30-22:07

1 stop17h 37m

Ottawa

Thu 22/5

18:55-06:30

Nonstop6h 35m

£464

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 3/5

12:40-00:21

1 stop16h 41m

Ottawa

Mon 12/5

14:20-10:45

1 stop15h 25m

£471

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 14/5

07:00-00:22

3 stops22h 22m

Ottawa

Wed 21/5

05:55-21:45

2 stops34h 50m

£486

LondonOttawa

LCY - YOW

LCYYOW

London City

Thu 8/5

09:25-00:22

2 stops19h 57m

Ottawa

Mon 19/5

06:05-12:30

2 stops25h 25m

£496

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 3/9

18:35-23:04

2 stops33h 29m

Ottawa

Tue 16/9

13:55-17:50

2 stops22h 55m

£502

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 35 results
1
2
3
4

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 11 April 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 17 April 2025.

It’s typically best to fly out from London to Ottawa in the evening. Doing so could potentially save you 21% 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 Tuesday at midday when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ottawa by month

Plan your trip to Ottawa by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ottawa ranges from 50.0 - 93.0 inches per month. June is typically the wettest month, when rainfall can reach 93.0 mm. February is typically the driest time to visit Ottawa when rainfall is around 50.0 mm.

Temperature in Ottawa by month

Plan your trip to Ottawa by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ottawa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).

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 April 2025.
Read reviews from past customers who have flown Delta, KLM and Air Transat from London to Ottawa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Delta
8.0
Very Good
7,916 reviews
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
KLM
7.8
Good
1,327 reviews
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Air Transat
7.8
Good
385 reviews
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
LOT
7.6
Good
1,065 reviews
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Air France
7.5
Good
1,435 reviews
Delta
8.0
Very Good
7,916 reviews
Check prices

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

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?

    Air Canada, at £312, was found to be the cheapest airline from London to Ottawa.Alternate airlines flying return to your destination include United Airlines and Air France. Users have found that Air Canada is 44% 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 £348. Users have also found prices from £424 and £424 on Air Transat 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 Air Canada (100%), Aegean Airlines (100%) or Austrian Airlines (100%) 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 £528, our data indicates the cheapest price to be £345. The most popular route (London Heathrow - Ottawa), is priced around £329.

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

    London to Ottawa flights have a stopover in Toronto most of the time. Toronto is followed by Paris 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 Toronto?

    Most Toronto visitors opt to spend their time experiencing Union Station, CN Tower, and Yonge-Dundas Square. Union Station, CN Tower and Yonge-Dundas Square are located about 12.1 mi, 11.9 mi, and 12.0 mi, respectively from Toronto Pearson Intl if you are interested in checking them out. Those landing in Toronto looking to spend some time exploring during their stopover can hire a car for about £32 per day.

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

    The majority of Paris visitors spend their time at Eiffel Tower, Moulin Rouge, and Champs-Elysées. Eiffel Tower, Moulin Rouge, and Champs-Elysées can be visited by travelling about 15.8 mi, 13.3 mi, and 14.7 mi respectively from Paris Charles de Gaulle. Those looking to explore during their stopover in Paris can hire a car from Paris Charles de Gaulle for about £37 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatineau
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 17 April 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 17 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£308Average£446FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£343Average£592FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air FranceCheapest£372Average£499FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapest£382Average£450FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£385Average£518FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air TransatCheapest£418Average£519FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£452Average£568FlexibilityNo 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.
Site
©2025 Cheapflights