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Cheap flights from London to Ottawa from C$ 400

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 17/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
30 Mar — 6 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 Tuesday and return on a Saturday

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 25 March 2025.

Round-trip from

C$ 802

One-way from

C$ 400

Popular in

August

Cheapest in

January

Average price

C$ 953

Good round-trip deal

C$ 873 or less

Good one-way deal

C$ 930 or less
United Airlines
  • United Airlines
  • 8/7-16/7
  • 4 total stops
  • 49h 00m total
  • London to Ottawa
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17/6
  • 17/6
  • 2 total stops
  • 38h 25m total
  • London to Ottawa
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Highest demand for flights based on searches. 15% potential increase in price (C$ 282 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 46 potential savings vs. average RT price).
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Average for round-trip flights in March 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 25 March 2025.

Wed 26/38:00 a.m.LHR - YOW
2 stops19h 54mUnited Airlines
Thu 3/49:50 a.m.YOW - LHR
2 stops15h 55mUnited Airlines
Deal found 24/3C$ 772
Sat 26/43:50 p.m.LHR - YOW
1 stop14h 44mAir Canada
Sat 3/59:00 p.m.YOW - LHR
Nonstop6h 35mAir Canada
Deal found 24/3C$ 815
Wed 7/511:35 a.m.LGW - YOW
2 stops17h 47mMultiple Airlines
Wed 14/55:55 a.m.YOW - LGW
1 stop23h 50mMultiple Airlines
Deal found 23/3C$ 822
Thu 12/612:40 p.m.LGW - YOW
1 stop16h 41mAir Transat
Sat 14/67:00 a.m.YOW - LGW
1 stop19h 55mAir Transat
Deal found 24/3C$ 844
Thu 8/56:00 a.m.LHR - YOW
2 stops23h 19mAustrian Airlines
Thu 15/57:55 p.m.YOW - LHR
1 stop10h 55mAustrian Airlines
Deal found 23/3C$ 847
Wed 26/32:45 p.m.LHR - YOW
1 stop29h 25mAir France
Tue 1/45:15 p.m.YOW - LHR
1 stop12h 15mAir France
Deal found 24/3C$ 848
Wed 7/56:00 a.m.LHR - YOW
2 stops20h 09mMultiple Airlines
Wed 14/59:00 p.m.YOW - LHR
Nonstop6h 35mMultiple Airlines
Deal found 24/3C$ 870
Mon 12/52:05 p.m.LHR - YOW
Nonstop7h 30mLufthansa
Wed 21/58:55 p.m.YOW - LHR
1 stop8h 05mLufthansa
Deal found 24/3C$ 875
Wed 7/58:45 a.m.LCY - YOW
2 stops20h 34mLufthansa
Wed 14/51:55 p.m.YOW - LCY
2 stops13h 15mLufthansa
Deal found 23/3C$ 880
Wed 26/32:45 p.m.LHR - YOW
1 stop29h 25mVirgin Atlantic
Sun 6/45:15 p.m.YOW - LHR
1 stop9h 45mVirgin Atlantic
Deal found 24/3C$ 882
Mon 12/58:45 a.m.LCY - YOW
2 stops20h 37mMultiple Airlines
Thu 22/55:55 a.m.YOW - LCY
2 stops21h 25mMultiple Airlines
Deal found 23/3C$ 910
Thu 8/56:40 p.m.LGW - YOW
2 stops51h 24mSWISS
Thu 22/51:55 p.m.YOW - LGW
2 stops22h 55mSWISS
Deal found 24/3C$ 935

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 25 March 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

Tue 8/7

11:05 a.m.-1:10 p.m.

2 stops31h 05m

Ottawa

Wed 16/7

10:25 a.m.-9:20 a.m.

2 stops17h 55m

C$ 802

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 26/4

3:50 p.m.-1:34 a.m.

1 stop14h 44m

Ottawa

Sat 3/5

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

Nonstop6h 35m

C$ 815

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 7/5

11:35 a.m.-12:22 a.m.

2 stops17h 47m

Ottawa

Wed 14/5

5:55 a.m.-10:45 a.m.

1 stop23h 50m

C$ 822

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 12/6

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

1 stop16h 41m

Ottawa

Sat 14/6

7:00 a.m.-7:55 a.m.

1 stop19h 55m

C$ 844

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 8/5

6:00 a.m.-12:19 a.m.

2 stops23h 19m

Ottawa

Thu 15/5

7:55 p.m.-11:50 a.m.

1 stop10h 55m

C$ 847

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 7/5

6:00 a.m.-9:09 p.m.

2 stops20h 09m

Ottawa

Wed 14/5

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

Nonstop6h 35m

C$ 870

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

2:05 p.m.-4:35 p.m.

Nonstop7h 30m

Ottawa

Wed 21/5

8:55 p.m.-10:00 a.m.

1 stop8h 05m

C$ 875

LondonOttawa

LCY - YOW

LCYYOW

London City

Wed 7/5

8:45 a.m.-12:19 a.m.

2 stops20h 34m

Ottawa

Wed 14/5

1:55 p.m.-8:10 a.m.

2 stops13h 15m

C$ 880

LondonOttawa

LCY - YOW

LCYYOW

London City

Mon 12/5

8:45 a.m.-12:22 a.m.

2 stops20h 37m

Ottawa

Thu 22/5

5:55 a.m.-8:20 a.m.

2 stops21h 25m

C$ 910

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 8/5

6:40 p.m.-5:04 p.m.

2 stops51h 24m

Ottawa

Thu 22/5

1:55 p.m.-5:50 p.m.

2 stops22h 55m

C$ 935

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/3

Showing 1-10 of 39 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 21 March 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 88 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 25 March 2025.

A simple way to save on the total cost of your ticket is to fly from London to Ottawa at noon. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight in the morning.

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 mm 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 25 March 2025.
Peruse reviews from past customers who have flown with KLM, Air Transat and LOT 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.
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,318 reviews
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air Transat
7.8
Good
381 reviews
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
LOT
7.6
Good
1,061 reviews
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.5
Good
769 reviews
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,569 reviews
KLM
7.8
Good
1,318 reviews
Check prices

Boarding

7.8

Comfort

7.7

Entertainment

7.1

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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. 2 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 0 inbound flights from London per day.

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

    Our cheapest airline available from London to Ottawa is United Airlines. Our recent data shows that you can find tickets from as low as C$ 802 on this airline. Additional options worth looking into are Air Canada and Air Transat, starting at C$ 815 and C$ 844 round-trip. These flights start at 25% lower than the current average price 3 months from now.

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

    C$ 554 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Transat and Lufthansa, with prices starting from C$ 797 and C$ 888, 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 cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 853. On average you can expect to pay C$ 1,767. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 596.

  • 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 London?

Book flights to London if you plan to visit one of these locations
Gatineau
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Smiths Falls
Prescott
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Wakefield
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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.
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Top 2 airlines flying from London to Ottawa

Discover the top 2 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 826AverageC$ 1,001FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 927AverageC$ 1,130FlexibilityNo cancel feeOn-time67%
Search Air Canada 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.

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