HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ottawa

$383+ Cheap flights from London (LON) to Ottawa (YOW)

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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Ottawa with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Friday and return on a Thursday

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 September 11, 2025.

Round-trip from

$609
(KLM)

One-way from

$383
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$726

Good round-trip deal

$656 or less

Good one-way deal

$676 or less
From London (LON) to Ottawa
Search Deals
One-way flight from London (LON) to Ottawa
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($117 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 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 September 11, 2025.

This KLM deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 amLHR - YOW
2 stops13h 40mMultiple Airlines
Fri 1/165:20 pmYOW - LHR
1 stop18h 15mMultiple Airlines
Deal found 9/10$609
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:10 amLGW - YOW
2 stops23h 12mMultiple Airlines
Sun 10/52:20 pmYOW - LGW
2 stops21h 50mMultiple Airlines
Deal found 9/10$629
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:50 amLHR - YOW
2 stops12h 01mMultiple Airlines
Sun 10/127:50 pmYOW - LHR
1 stop29h 45mMultiple Airlines
Deal found 9/11$662
This Air Transat deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2011:40 amLGW - YOW
1 stop11h 46mAir Transat
Sun 11/2310:00 amYOW - LGW
1 stop18h 45mAir Transat
Deal found 9/11$663
This Trip.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/410:45 amLGW - YOW
2 stops18h 37mWestJet
Fri 10/105:55 amYOW - LGW
2 stops22h 30mWestJet
Deal found 9/10$664
This Virgin Atlantic deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:50 pmLHR - YOW
1 stop11h 32mVirgin Atlantic
Mon 10/205:15 pmYOW - LHR
1 stop18h 20mVirgin Atlantic
Deal found 9/10$689
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/127:30 amLHR - YOW
2 stops16h 22mUnited Airlines
Sun 9/145:15 amYOW - LHR
2 stops20h 05mUnited Airlines
Deal found 9/11$691
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/187:45 amLHR - YOW
2 stops13h 58mUnited Airlines
Sat 9/275:15 amYOW - LHR
2 stops20h 05mUnited Airlines
Deal found 9/11$692
This SWISS deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:00 amLHR - YOW
2 stops16h 37mSWISS
Sun 11/2310:50 amYOW - LHR
2 stops16h 15mSWISS
Deal found 9/11$697
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:10 pmLHR - YOW
2 stops27h 59mUnited Airlines
Sun 10/512:30 pmYOW - LHR
1 stop12h 25mUnited Airlines
Deal found 9/11$713
This Kiwi.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:30 amLHR - YOW
1 stop12h 49mLufthansa
Fri 10/108:55 pmYOW - LHR
1 stop28h 35mLufthansa
Deal found 9/11$717
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/209:10 amLHR - YOW
2 stops17h 08mUnited Airlines
Sun 11/232:15 pmYOW - LHR
2 stops15h 10mUnited Airlines
Deal found 9/11$721

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 2,558,603 searches. Data last updated September 11, 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 10/2

6:10 am-12:22 am

2 stops23h 12m

Ottawa

Sun 10/5

2:20 pm-5:10 pm

2 stops21h 50m

$629

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 11/20

11:40 am-6:26 pm

1 stop11h 46m

Ottawa

Sun 11/23

10:00 am-9:45 am

1 stop18h 45m

$663

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 10/4

10:45 am-12:22 am

2 stops18h 37m

Ottawa

Fri 10/10

5:55 am-9:25 am

2 stops22h 30m

$664

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 10/16

5:50 pm-12:22 am

1 stop11h 32m

Ottawa

Mon 10/20

5:15 pm-4:35 pm

1 stop18h 20m

$689

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 11/20

6:00 am-5:37 pm

2 stops16h 37m

Ottawa

Sun 11/23

10:50 am-8:05 am

2 stops16h 15m

$697

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 10/3

2:10 pm-1:09 pm

2 stops27h 59m

Ottawa

Sun 10/5

12:30 pm-5:55 am

1 stop12h 25m

$713

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 10/4

9:30 am-5:19 pm

1 stop12h 49m

Ottawa

Fri 10/10

8:55 pm-6:30 am

1 stop28h 35m

$717

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 11/20

9:10 am-9:18 pm

2 stops17h 08m

Ottawa

Sun 11/23

2:15 pm-10:25 am

2 stops15h 10m

$721

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 10/2

2:05 pm-4:25 pm

Nonstop7h 20m

Ottawa

Sun 10/5

11:05 am-6:30 am

1 stop14h 25m

$730

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 10/9

6:50 am-1:51 pm

2 stops12h 01m

Ottawa

Sun 10/12

3:55 pm-5:05 pm

2 stops20h 10m

$735

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 34 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 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 August 29, 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, January is the cheapest month in which you can book a flight from London to Ottawa (average of $294). Flying from London to Ottawa in September is currently the most expensive (average of $419). 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 September 11, 2025.

It’s optimal to fly from London to Ottawa in the morning. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight at noon.

How much does it cost to fly round-trip 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 September 11, 2025.
Read through reviews of airlines operating flights from London to Ottawa, such as Air Canada and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,000 reviews

Crew

7.8

Boarding

7.3

Entertainment

6.8

Overall

7.1

Food

6.3

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Air Canada
7.1
Good
10,000 reviews
Air Canada
7.1
Good
10,000 reviews

Crew

7.8

Boarding

7.3

Entertainment

6.8

Overall

7.1

Food

6.3

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.
Lufthansa
6.8
Okay
7,409 reviews
Air Canada
7.1
Good
10,000 reviews

Crew

7.8

Boarding

7.3

Entertainment

6.8

Overall

7.1

Food

6.3

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

janet,Sep 2025

YOW - YYZ

Really appreciated the leg room despite purchasing an economy ticket. Appreciated the extra complimentary wine. Nice touch. Was given immediate support without asking at check in, at the machine!! Ottawa's boarding was very organized with distinct rows in waiting room. Allowed for the main hall to not be blocked by people waiting to board.

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) is the airport you will fly into if you book a flight from London to Ottawa. You should not have trouble finding flights to Ottawa from London; the airport handles an average of 4 inbound flights from London per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Ottawa airport from London. It is only a 6.6 mi journey from Ottawa (YOW) to Ottawa’s city center.

  • How long is the flight from London to Ottawa?

    For as low as $689, Air Transat can have you in Ottawa from London in 11h 32m. There are 3320 mi between London and Ottawa. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from London to Ottawa round-trip?

    Currently priced at $632, Air Canada will fly you from London to Ottawa and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. You may be able to fly from London to Ottawa for 14% less than the average price by searching for this airline.

  • What are the most reliable airlines from London to Ottawa?

    The top 3 most reliable airlines when flying from London to Ottawa are Air Canada (77%), Aegean Airlines (77%) and Austrian Airlines (77%).

  • What are the cheapest flights from London to Ottawa?

    On average you can expect to pay $806 for a flight from London to Ottawa. The cheapest flight overall is $646 while the most popular route, (London Gatwick - Ottawa) is currently priced at $716.

  • 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, January is the cheapest month in which you can book a flight from London to Ottawa (average of $294). Flying from London to Ottawa in September is currently the most expensive (average of $419). 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

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Petawawa

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.
Heathrow to Pearson Intl flights
Gatwick to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Edinburgh to Pearson Intl flights

Top airline flying from London to Ottawa

Discover the top airline 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 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$632Average$726FlexibilityNo cancel feeOn-time67%

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.