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$362+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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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 Saturday 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 July 30, 2025.

Round-trip from

$635
(Virgin Atlantic)

One-way from

$362
(Mytrip)

Popular in

August

Cheapest in

January

Average price

$885

Good round-trip deal

$776 or less
From London (LON) to Ottawa
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One-way flight from London (LON) to Ottawa
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Highest demand for flights based on searches. 15% potential increase in price ($134 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT 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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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 July 30, 2025.

This Virgin Atlantic deal was found by Cheapflights users on 7/29. 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.
Fri 11/289:00 amLHR - YOW
1 stop11h 10mVirgin Atlantic
Mon 12/155:20 pmYOW - LHR
1 stop18h 15mVirgin Atlantic
Deal found 7/29$635
This Trip.com deal was found by Cheapflights users on 7/29. 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.
Fri 11/2811:40 amLGW - YOW
1 stop11h 46mAir Transat
Mon 12/153:05 pmYOW - LGW
1 stop13h 40mAir Transat
Deal found 7/29$655
This KLM deal was found by Cheapflights users on 7/29. 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.
Mon 10/277:20 pmLHR - YOW
1 stop24h 50mAir France
Fri 10/316:20 pmYOW - LHR
1 stop12h 10mAir France
Deal found 7/29$660
This KLM deal was found by Cheapflights users on 7/29. 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.
Wed 10/13:20 pmLHR - YOW
2 stops14h 02mMultiple Airlines
Tue 10/145:15 pmYOW - LHR
2 stops12h 30mMultiple Airlines
Deal found 7/29$673
This SWISS deal was found by Cheapflights users on 7/29. 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.
Sun 10/56:00 amLHR - YOW
2 stops22h 04mSWISS
Sun 10/123:55 pmYOW - LHR
2 stops22h 25mSWISS
Deal found 7/29$698
This Lufthansa deal was found by Cheapflights users on 7/29. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:30 pmLHR - YOW
2 stops14h 38mLufthansa
Wed 1/74:00 pmYOW - LHR
1 stop10h 10mLufthansa
Deal found 7/29$702
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/2011:35 amLGW - YOW
2 stops17h 47mMultiple Airlines
Mon 9/225:05 pmYOW - LGW
1 stop12h 40mMultiple Airlines
Deal found 7/29$709
This Air Canada deal was found by Cheapflights users on 7/30. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2512:40 pmLHR - YOW
1 stop24h 48mAir Canada
Wed 9/311:05 amYOW - LHR
1 stop14h 25mAir Canada
Deal found 7/30$725
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/1210:50 amLHR - YOW
2 stops16h 15mUnited Airlines
Fri 9/1910:37 amYOW - LHR
1 stop14h 43mUnited Airlines
Deal found 7/29$744
This Austrian Airlines deal was found by Cheapflights users on 7/29. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:00 amLHR - YOW
2 stops16h 04mAustrian Airlines
Wed 10/155:55 pmYOW - LHR
2 stops46h 45mAustrian Airlines
Deal found 7/29$769
This Turkish Airlines deal was found by Cheapflights users on 7/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:20 amLGW - YOW
2 stops23h 59mTurkish Airlines
Tue 11/254:10 pmYOW - LGW
2 stops25h 25mTurkish Airlines
Deal found 7/30$1,478
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/29. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3110:35 amLGW - YOW
2 stops20h 00mTAP AIR PORTUGAL
Tue 8/121:55 pmYOW - LGW
2 stops20h 40mTAP AIR PORTUGAL
Deal found 7/29$1,751

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 July 30, 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 10/23

6:15 am-3:05 pm

1 stop13h 50m

Ottawa

Tue 11/25

5:20 pm-10:30 am

1 stop12h 10m

$644

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 11/28

11:40 am-6:26 pm

1 stop11h 46m

Ottawa

Mon 12/15

3:05 pm-9:45 am

1 stop13h 40m

$655

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 10/27

7:20 pm-4:10 pm

1 stop24h 50m

Ottawa

Fri 10/31

6:20 pm-10:30 am

1 stop12h 10m

$660

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 10/1

3:20 pm-12:22 am

2 stops14h 02m

Ottawa

Tue 10/14

5:15 pm-10:45 am

2 stops12h 30m

$673

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sun 10/5

6:00 am-11:04 pm

2 stops22h 04m

Ottawa

Wed 10/15

3:55 pm-5:50 pm

2 stops20h 55m

$698

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 9/20

11:35 am-12:22 am

2 stops17h 47m

Ottawa

Mon 9/22

5:05 pm-10:45 am

1 stop12h 40m

$709

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 10/2

2:05 pm-4:25 pm

Nonstop7h 20m

Ottawa

Wed 10/15

4:05 pm-6:30 am

1 stop9h 25m

$724

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 8/25

12:40 pm-8:28 am

1 stop24h 48m

Ottawa

Wed 9/3

11:05 am-6:30 am

1 stop14h 25m

$725

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 9/12

10:50 am-10:05 pm

2 stops16h 15m

Ottawa

Fri 9/19

10:37 am-6:20 am

1 stop14h 43m

$744

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 9/29

6:00 am-5:04 pm

2 stops16h 04m

Ottawa

Wed 10/15

5:55 pm-9:40 pm

2 stops46h 45m

$769

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 22 results
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2
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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 July 25, 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 $294). Flying from London to Ottawa in September is currently the most expensive (average of $428). 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 July 30, 2025.

It’s optimal to fly from London to Ottawa in the morning. By choosing this option you can save up to 6% 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 July 30, 2025.
Read through reviews of airlines operating flights from London to Ottawa, such as Delta, KLM, and Air Transat. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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
7.7
Good
424 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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
1,465 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Boarding

8.2

Overall

8.0

Food

7.3

Comfort

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?

    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.

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

    Currently priced at $635, Virgin Atlantic will fly you from London to Ottawa and back. In addition to Virgin Atlantic, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Transat and Air France - these airlines can fly you to your destination from $655 and $660, respectively. You may be able to fly from London to Ottawa for 14% less than the average price by searching for these airlines.

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

    The cheapest airlines for a one-way flight from London to Ottawa are WestJet ($507), Air Transat ($570), and Aer Lingus ($586).

  • 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 (90%), Aegean Airlines (90%) and Austrian Airlines (90%).

  • What are the cheapest flights from London to Ottawa?

    On average you can expect to pay $1,527 for a flight from London to Ottawa. The cheapest flight overall is $727 while the most popular route, (London Heathrow - Ottawa) is currently priced at $694.

  • 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 $428). 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

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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
Edinburgh to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Manchester 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$632Average$717FlexibilityNo cancel feeOn-time67%

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