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Ottawa

$396+ 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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$556
(KLM)

One-way from

$396
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$691

Good round-trip deal

$717 or less

Good one-way deal

$725 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 ($135 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This KLM deal was found by Cheapflights users on 6/10. 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.
jue. 7/36:15 amLHR - YOW
1 stop13h 50mMultiple Airlines
lun. 7/145:15 pmYOW - LHR
2 stops12h 30mMultiple Airlines
Deal found 6/10$556
This KLM deal was found by Cheapflights users on 6/12. 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.
mié. 7/26:30 amLHR - YOW
2 stops13h 35mKLM
lun. 7/215:15 pmYOW - LHR
2 stops12h 30mKLM
Deal found 6/12$565
This Virgin Atlantic deal was found by Cheapflights users on 6/9. 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.
lun. 9/15:50 pmLHR - YOW
1 stop11h 32mVirgin Atlantic
dom. 9/75:20 pmYOW - LHR
1 stop15h 25mVirgin Atlantic
Deal found 6/9$633
This Mytrip deal was found by Cheapflights users on 6/10. 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.
jue. 7/311:35 amLGW - YOW
2 stops17h 47mMultiple Airlines
jue. 7/105:55 amYOW - LGW
1 stop23h 50mMultiple Airlines
Deal found 6/10$649
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/310:00 amLGW - YOW
1 stop16h 11mAir Transat
lun. 7/145:05 pmYOW - LGW
1 stop9h 50mAir Transat
Deal found 6/11$661
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2712:00 pmLGW - YOW
2 stops17h 22mDelta
dom. 8/315:55 amYOW - LGW
2 stops23h 05mDelta
Deal found 6/10$674
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 8/285:50 pmLHR - YOW
1 stop11h 32mDelta
lun. 9/15:55 amYOW - LHR
2 stops21h 55mDelta
Deal found 6/10$693
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/216:30 amLHR - YOW
2 stops22h 50mLufthansa
jue. 9/46:55 pmYOW - LHR
Nonstop6h 35mLufthansa
Deal found 6/10$707
This Austrian Airlines deal was found by Cheapflights users on 6/12. 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.
mar. 6/176:00 amLHR - YOW
2 stops16h 04mAustrian Airlines
mié. 9/37:50 pmYOW - LHR
1 stop29h 45mAustrian Airlines
Deal found 6/12$710
This Air France deal was found by Cheapflights users on 6/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/36:15 amLHR - YOW
1 stop13h 50mAir France
jue. 7/105:15 pmYOW - LHR
1 stop9h 45mAir France
Deal found 6/10$724
This Air Canada deal was found by Cheapflights users on 6/9. 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.
jue. 7/1012:40 pmLHR - YOW
1 stop15h 28mAir Canada
vie. 7/186:10 pmYOW - LHR
1 stop21h 50mAir Canada
Deal found 6/9$733
This United Airlines deal was found by Cheapflights users on 6/12. 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.
mié. 10/19:30 amLHR - YOW
2 stops14h 22mUnited Airlines
mar. 10/142:45 pmYOW - LHR
2 stops14h 25mUnited Airlines
Deal found 6/12$750

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 junio 12, 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

jue. 7/3

6:15 am-3:05 pm

1 stop13h 50m

Ottawa

lun. 7/14

5:15 pm-10:45 am

2 stops12h 30m

$556

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

mié. 7/2

6:30 am-3:05 pm

2 stops13h 35m

Ottawa

lun. 7/21

5:15 pm-10:45 am

2 stops12h 30m

$565

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

lun. 9/1

5:50 pm-12:22 am

1 stop11h 32m

Ottawa

dom. 9/7

5:20 pm-1:45 pm

1 stop15h 25m

$633

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

jue. 7/3

11:35 am-12:22 am

2 stops17h 47m

Ottawa

jue. 7/10

5:55 am-10:45 am

1 stop23h 50m

$649

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

jue. 7/3

10:00 am-9:11 pm

1 stop16h 11m

Ottawa

lun. 7/14

5:05 pm-7:55 am

1 stop9h 50m

$661

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

mié. 8/27

12:00 pm-12:22 am

2 stops17h 22m

Ottawa

mar. 9/2

5:55 am-10:00 am

2 stops23h 05m

$674

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

jue. 8/28

5:50 pm-12:22 am

1 stop11h 32m

Ottawa

lun. 9/1

5:55 am-8:50 am

2 stops21h 55m

$693

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

mar. 6/24

8:30 am-12:20 am

2 stops20h 50m

Ottawa

jue. 9/4

6:55 pm-6:30 am

Nonstop6h 35m

$707

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

jue. 7/3

6:15 am-3:05 pm

1 stop13h 50m

Ottawa

jue. 7/10

5:15 pm-8:00 am

1 stop9h 45m

$724

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

jue. 7/10

12:40 pm-11:08 pm

1 stop15h 28m

Ottawa

vie. 7/18

6:10 pm-9:00 pm

1 stop21h 50m

$733

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 26 results
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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 June 9, 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 junio 12, 2025.

It’s optimal to fly from London to Ottawa at noon. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight in the afternoon.

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 2.0 - 3.7 inches per month. June is typically the wettest month, when rainfall can reach 3.7 in. February is typically the driest time to visit Ottawa when rainfall is around 2.0 in.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 F).

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 junio 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Air Transat from London to Ottawa to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
396 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
802 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

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 1 inbound flight 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 $565, KLM will fly you from London to Ottawa and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and Air Transat - these airlines can fly you to your destination from $633 and $661, respectively. You may be able to fly from London to Ottawa for 23% 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 ($550), Air Transat ($704), and Lufthansa ($762).

  • 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 (97%), Aegean Airlines (97%) and Austrian Airlines (97%).

  • What are the cheapest flights from London to Ottawa?

    On average you can expect to pay $853 for a flight from London to Ottawa. The cheapest flight overall is $484 while the most popular route, (London Heathrow - Ottawa) is currently priced at $504.

  • 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 London?

Book flights to London if you plan to visit one of these locations
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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
Heathrow to Pierre Elliott Trudeau Intl flights
Gatwick to Pearson Intl flights
Edinburgh to Pearson 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$589Average$717FlexibilityNo cancel feeOn-time67%

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