Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Ottawa from C$ 435

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
14 Oct — 21 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or February, booked 90 days in advance, depart on a Wednesday or Thursday and return on a Friday

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 14 September 2025.

Round-trip from

C$ 825

One-way from

C$ 435

Popular in

August

Cheapest in

January

Average price

C$ 1,001

Good round-trip deal

C$ 923 or less

Good one-way deal

C$ 1,058 or less
15/10-6/11
  • 15/10-6/11
  • 3 total stops
  • 44h 32m total
  • London to Ottawa
Search Deals
15/12
  • 15/12
  • 2 total stops
  • 45h 27m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 223 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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

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 14 September 2025.

Wed 15/109:30 a.m.LHR - YOW
2 stops19h 52mMultiple Airlines
Thu 6/115:40 a.m.YOW - LHR
1 stop24h 40mMultiple Airlines
Deal found 13/9C$ 825
Wed 24/95:50 p.m.LHR - YOW
1 stop11h 32mKLM
Sat 4/105:55 a.m.YOW - LHR
2 stops19h 30mKLM
Deal found 12/9C$ 833
Sat 11/1010:45 a.m.LGW - YOW
2 stops18h 37mWestJet
Sat 18/105:55 a.m.YOW - LGW
2 stops22h 30mWestJet
Deal found 13/9C$ 836
Thu 16/105:50 p.m.LHR - YOW
1 stop11h 32mMultiple Airlines
Thu 30/106:20 p.m.YOW - LHR
1 stop9h 40mMultiple Airlines
Deal found 13/9C$ 836
Tue 14/105:50 p.m.LHR - YOW
1 stop11h 32mMultiple Airlines
Thu 23/105:15 p.m.YOW - LHR
1 stop9h 45mMultiple Airlines
Deal found 12/9C$ 839
Tue 28/107:20 p.m.LHR - YOW
1 stop24h 50mMultiple Airlines
Tue 4/115:30 p.m.YOW - LHR
2 stops12h 15mMultiple Airlines
Deal found 12/9C$ 846
Sat 11/1012:40 p.m.LGW - YOW
1 stop16h 42mMultiple Airlines
Sat 18/105:55 a.m.YOW - LGW
1 stop23h 50mMultiple Airlines
Deal found 13/9C$ 848
Fri 10/109:30 a.m.LHR - YOW
2 stops19h 52mMultiple Airlines
Fri 17/105:55 a.m.YOW - LHR
2 stops19h 35mMultiple Airlines
Deal found 12/9C$ 855
Wed 24/912:40 p.m.LHR - YOW
Nonstop7h 20mLufthansa
Sat 4/105:55 p.m.YOW - LHR
2 stops46h 05mLufthansa
Deal found 12/9C$ 864
Fri 19/95:50 p.m.LHR - YOW
1 stop11h 32mKLM
Fri 26/95:55 a.m.YOW - LHR
2 stops19h 30mKLM
Deal found 12/9C$ 868
Thu 9/106:50 a.m.LHR - YOW
2 stops12h 01mAir Canada
Sun 12/107:50 p.m.YOW - LHR
2 stops20h 10mAir Canada
Deal found 12/9C$ 869
Fri 10/1010:45 a.m.LGW - YOW
2 stops19h 49mMultiple Airlines
Fri 17/102:20 p.m.YOW - LGW
2 stops23h 35mMultiple Airlines
Deal found 12/9C$ 875

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 14 September 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

Thu 23/10

5:50 p.m.-12:22 a.m.

1 stop11h 32m

Ottawa

Thu 30/10

6:20 p.m.-1:45 p.m.

1 stop15h 25m

C$ 836

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 29/10

6:30 a.m.-4:10 p.m.

2 stops13h 40m

Ottawa

Wed 5/11

5:20 p.m.-10:45 a.m.

2 stops12h 25m

C$ 871

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 13/1

11:40 a.m.-12:42 a.m.

1 stop18h 02m

Ottawa

Tue 20/1

5:40 a.m.-9:45 a.m.

1 stop23h 05m

C$ 875

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 2/1

2:30 p.m.-12:10 a.m.

1 stop14h 40m

Ottawa

Sun 11/1

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

1 stop11h 55m

C$ 876

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 10/10

10:45 a.m.-2:46 p.m.

1 stop33h 01m

Ottawa

Wed 22/10

5:55 a.m.-9:25 a.m.

2 stops22h 30m

C$ 880

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 10/10

10:45 a.m.-12:22 a.m.

2 stops18h 37m

Ottawa

Fri 17/10

5:55 a.m.-9:25 a.m.

2 stops22h 30m

C$ 883

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 24/9

12:40 p.m.-12:21 a.m.

1 stop16h 41m

Ottawa

Sat 4/10

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

1 stop12h 40m

C$ 902

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 9/10

9:30 a.m.-8:17 p.m.

2 stops15h 47m

Ottawa

Sun 12/10

3:55 p.m.-9:35 a.m.

2 stops12h 40m

C$ 908

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 28/10

8:25 p.m.-4:10 p.m.

2 stops23h 45m

Ottawa

Tue 4/11

5:30 p.m.-10:45 a.m.

2 stops12h 15m

C$ 912

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 6/10

12:40 p.m.-1:34 a.m.

2 stops17h 54m

Ottawa

Wed 22/10

9:00 p.m.-8:35 a.m.

Nonstop6h 35m

C$ 929

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

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 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 September 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, October is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 224). Flying from London to Ottawa in December is currently the most expensive (average of C$ 326). 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 14 September 2025.

A simple way to save on the total cost of your ticket is to fly from London to Ottawa in the morning. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from London to Ottawa?

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.

Toronto (YYZ) – chosen by Cheapflights users on 47% 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.

Paris (CDG) is the most affordable 1-stop option, with an average round-trip price of C$ 844.

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 21m.

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 14 September 2025.
Check out reviews from past customers who have flown with Air Transat and Air Canada 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
7.7
Good
438 reviews
Check prices

Entertainment

7.0

Boarding

7.9

Food

6.7

Comfort

7.3

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Transat
7.7
Good
438 reviews
Air Transat
7.7
Good
438 reviews
Check prices

Entertainment

7.0

Boarding

7.9

Food

6.7

Comfort

7.3

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Canada
7.1
Good
10,000 reviews
Air Transat
7.7
Good
438 reviews
Check prices

Entertainment

7.0

Boarding

7.9

Food

6.7

Comfort

7.3

Crew

8.4

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.

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 2 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 13h 40m. KLM provides one of the quickest options available for as low as C$ 871. 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$ 737 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at C$ 803 and C$ 856 round-trip. These flights start at 27% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from London to Ottawa one-way?

    C$ 509 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Virgin Atlantic and Air France, with prices starting from C$ 518 and C$ 552, 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?

    Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (77%), Aegean Airlines (77%), Austrian Airlines( 77%).

  • What are the cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 701. On average you can expect to pay C$ 1,065. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 684.

  • 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, October is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 224). Flying from London to Ottawa in December is currently the most expensive (average of C$ 326). 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
Prescott
Pembroke
Wakefield

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.

Alternative routes for London to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Pearson Intl flights
Heathrow to Pearson Intl flights
London City to Pearson Intl flights
Stansted to Pearson Intl flights
Luton to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Edinburgh to Pearson Intl flights
Heathrow to Ottawa flights
Luton to Pierre Elliott Trudeau Intl flights
Gatwick to Ottawa flights
Stansted to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
Birmingham to Pearson Intl flights
Southend to Pierre Elliott Trudeau Intl flights
Leeds to Pearson Intl flights
Manchester to Pierre Elliott Trudeau Intl flights
Newcastle upon Tyne to Pearson Intl flights
Heathrow to Hamilton flights
Edinburgh to Pierre Elliott Trudeau Intl flights
Bristol to Pearson Intl flights
Southampton to Pearson Intl flights
Stansted to Ottawa flights
Heathrow to Windsor flights
Heathrow to London flights
Manchester to Ottawa flights
Liverpool to Pierre Elliott Trudeau Intl flights
Birmingham to Pierre Elliott Trudeau Intl flights
Gatwick to Region of Waterloo Intl flights
Heathrow to Thunder Bay flights
Birmingham to Ottawa flights
Southampton to Pierre Elliott Trudeau Intl flights
Newcastle upon Tyne to Pierre Elliott Trudeau Intl flights
Newcastle upon Tyne to Ottawa flights
Manchester to Thunder Bay flights
Bristol to Pierre Elliott Trudeau Intl flights
Darlington to Pearson 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 14 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 737AverageC$ 967FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 812AverageC$ 1,048FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 856AverageC$ 966FlexibilityNo 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.

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.