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Cheap flights from London to Ottawa from C$ 399

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Ottawa departing on 18/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London to Ottawa (LON-YOW)

Cheap round-trip flights

WestJet Logo
10:45 a.m. - 12:22 a.m.LGW-YOW
18h 37m2 stops
WestJet Logo
5:55 a.m. - 9:25 a.m.YOW-LGW
22h 30m2 stops
C$ 881WestJet
Find Deal
Mon, 6 Oct - Fri, 10 Oct
WestJet Logo
10:45 a.m. - 12:22 a.m.LGW-YOW
18h 37m2 stops
WestJet Logo
5:55 a.m. - 9:25 a.m.YOW-LGW
22h 30m2 stops
C$ 882WestJet
Find Deal
Tue, 16 Sep - Tue, 30 Sep
Logo
11:35 a.m. - 12:22 a.m.LGW-YOW
17h 47m2 stops
Logo
5:55 a.m. - 10:45 a.m.YOW-LGW
23h 50m1 stop
C$ 884
Find Deal
Thu, 25 Sep - Thu, 2 Oct
WestJet Logo
10:45 a.m. - 12:22 a.m.LGW-YOW
18h 37m2 stops
WestJet Logo
5:55 a.m. - 9:25 a.m.YOW-LGW
22h 30m2 stops
C$ 885WestJet
Find Deal
Mon, 6 Oct - Fri, 10 Oct
Air France Logo
6:15 a.m. - 3:05 p.m.LHR-YOW
13h 50m1 stop
Air France Logo
5:15 p.m. - 1:45 p.m.YOW-LHR
15h 30m1 stop
C$ 896Air France
Find Deal
Thu, 16 Oct - Thu, 23 Oct
Logo
12:40 p.m. - 12:22 a.m.LGW-YOW
16h 42m1 stop
Logo
5:55 a.m. - 9:50 a.m.YOW-LGW
46h 55m2 stops
C$ 896
Find Deal
Mon, 6 Oct - Fri, 10 Oct
Air Canada Logo
4:00 p.m. - 9:11 a.m.LHR-YOW
22h 11m1 stop
Air Canada Logo
9:00 p.m. - 8:35 a.m.YOW-LHR
6h 35mdirect
C$ 899Air Canada
Find Deal
Sat, 27 Sep - Sat, 4 Oct
Air Canada Logo
2:05 p.m. - 4:25 p.m.LHR-YOW
7h 20mdirect
Air Canada Logo
6:10 p.m. - 9:00 p.m.YOW-LHR
21h 50m1 stop
C$ 903Air Canada
Find Deal
Thu, 9 Oct - Sat, 11 Oct
Air Transat Logo
12:40 p.m. - 9:00 p.m.LGW-YOW
13h 20m1 stop
Air Transat Logo
5:05 p.m. - 10:45 a.m.YOW-LGW
12h 40m1 stop
C$ 904Air Transat
Find Deal
Fri, 12 Sep - Sun, 14 Sep
Air Transat Logo
12:40 p.m. - 8:05 a.m.LGW-YOW
24h 25m1 stop
Air Transat Logo
10:45 a.m. - 10:45 a.m.YOW-LGW
19h 00m1 stop
C$ 907Air Transat
Find Deal
Fri, 10 Oct - Mon, 20 Oct

WestJet flights from London to Ottawa

Our best WestJet deals on London to Ottawa flight tickets
WestJet
6 Oct
LGW10:45 a.m.London Gatwick
18h 37m
2 stops
YOW12:22 a.m.Ottawa
10 Oct
YOW5:55 a.m.Ottawa
22h 30m
2 stops
LGW9:25 a.m.London Gatwick
C$ 881
Find similar
WestJet
16 Sep
LGW10:45 a.m.London Gatwick
18h 37m
2 stops
YOW12:22 a.m.Ottawa
30 Sep
YOW5:55 a.m.Ottawa
22h 30m
2 stops
LGW9:25 a.m.London Gatwick
C$ 882
Find similar
WestJet
6 Oct
LGW10:45 a.m.London Gatwick
18h 37m
2 stops
YOW12:22 a.m.Ottawa
10 Oct
YOW5:55 a.m.Ottawa
22h 30m
2 stops
LGW9:25 a.m.London Gatwick
C$ 885
Find similar

Air Canada flights from London to Ottawa

Our best Air Canada deals on London to Ottawa flight tickets
Air Canada
27 Sep
LHR4:00 p.m.London Heathrow
22h 11m
1 stop
YOW9:11 a.m.Ottawa
4 Oct
YOW9:00 p.m.Ottawa
6h 35m
LHR8:35 a.m.London Heathrow
C$ 899
Find similar
Air Canada
9 Oct
LHR2:05 p.m.London Heathrow
7h 20m
YOW4:25 p.m.Ottawa
11 Oct
YOW6:10 p.m.Ottawa
21h 50m
1 stop
LHR9:00 p.m.London Heathrow
C$ 903
Find similar
Air Canada
11 Oct
LHR3:50 p.m.London Heathrow
14h 44m
1 stop
YOW1:34 a.m.Ottawa
18 Oct
YOW9:00 p.m.Ottawa
6h 35m
LHR8:35 a.m.London Heathrow
C$ 904
Find similar

momondo 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, momondo users made 96,600 searches. Data last updated 31 August 2025.
Use the filters below to find and compare flights from London to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 6/10

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

2 stops18h 37m

Ottawa

Fri 10/10

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

2 stops22h 30m

C$ 881

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 16/9

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

2 stops18h 37m

Ottawa

Tue 30/9

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

2 stops22h 30m

C$ 882

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 25/9

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

2 stops17h 47m

Ottawa

Thu 2/10

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

1 stop23h 50m

C$ 884

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 6/10

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

2 stops18h 37m

Ottawa

Fri 10/10

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

2 stops22h 30m

C$ 885

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 16/10

6:15 a.m.-3:05 p.m.

1 stop13h 50m

Ottawa

Thu 23/10

5:15 p.m.-1:45 p.m.

1 stop15h 30m

C$ 896

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 6/10

12:40 p.m.-12:22 a.m.

1 stop16h 42m

Ottawa

Fri 10/10

5:55 a.m.-9:50 a.m.

2 stops46h 55m

C$ 896

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 27/9

4:00 p.m.-9:11 a.m.

1 stop22h 11m

Ottawa

Sat 4/10

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

Nonstop6h 35m

C$ 899

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 9/10

2:05 p.m.-4:25 p.m.

Nonstop7h 20m

Ottawa

Sat 11/10

6:10 p.m.-9:00 p.m.

1 stop21h 50m

C$ 903

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 12/9

12:40 p.m.-9:00 p.m.

1 stop13h 20m

Ottawa

Sun 14/9

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

1 stop12h 40m

C$ 904

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 10/10

12:40 p.m.-8:05 a.m.

1 stop24h 25m

Ottawa

Mon 20/10

10:45 a.m.-10:45 a.m.

1 stop19h 00m

C$ 907

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Ottawa from

How to get the cheapest flight ticket from London to Ottawa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ottawa?

The month of January is, on average, the cheapest month to fly to Ottawa from London, with most prices found around C$ 863. If you aren’t able to travel to Ottawa during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of C$ 875.

What is the cheapest day to depart on your flight to Ottawa?

Our data shows that Wednesday is the least expensive day to fly to Ottawa. Tickets to fly out on this day can be as low as C$ 1,017. Flights from London to Ottawa on a Saturday will generally be more expensive and average around C$ 1,308. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ottawa?

Our most recent data shows that the best time of day to fly to Ottawa is in the morning. Flights from London to Ottawa during this time can be as low as C$ 1,011. At noon is when there is more demand to fly to Ottawa, so prices are often more expensive at around C$ 1,122 per ticket.

What is the cheapest London to Ottawa flight route?

Fly from London Heathrow to Ottawa for the best London - Ottawa flight prices

How far in advance should I book a flight to Ottawa?

You are more likely to see cheaper flights to Ottawa from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around C$ 1,029 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from London for as low as C$ 746 on momondo.

What cabin class options are available on London to Ottawa flights?

There are 3 cabin classes available to choose from on London to Ottawa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Ottawa flights?

You could potentially save up to 29% on your flight if you consider stops on a London to Ottawa flight.

How have London to Ottawa flight prices changed over time?

As of August 2025, prices for London to Ottawa flights are approximately 3% more expensive when compared to flights at the same time last year.

When to book flights from London to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ottawa according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London to Ottawa (LON to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ottawa

Best price found

C$ 1,050

Fastest flight time

7h 20m

Direct flights

Tue, Thu, Fri and Sun

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from London in the past 72 hours is C$ 1,050. The best round-trip flight deal from London to Ottawa found on momondo in the last 72 hours is C$ 1,011.
The fastest flight from London to Ottawa takes 7h 20m
Direct flights go from London to Ottawa on Tuesday, Thursday, Friday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Ottawa: Ottawa (YOW)
Search flight deals

  • How far is London to Ottawa by plane?

    London and Ottawa are 5358.1 km apart from one another. Typically, this will take 7h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from London to Ottawa Airport?

    Prices for flights from London to Ottawa Airport refresh daily.

  • How many operators does momondo search for flights from London to Ottawa Airport?

  • How old do you have to be to fly from London to Ottawa Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The travel and health documents required for your trip to Ottawa Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ottawa Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London to Ottawa?

  • What is the most popular airline from London to Ottawa?

Best airlines flying from London to Ottawa

Compare and see reviews for airlines that fly from London to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Air FrancePriceFrom C$ 791Free CancellationRating
7.4
1,472 reviews
Search Air France flights
Air CanadaPriceFrom C$ 806Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
LufthansaPriceFrom C$ 849Free CancellationRating
6.8
7,374 reviews
Search Lufthansa flights

  • Air Canada Flights From London to Ottawa

    Air Canada is one of the most popular airlines flying from London to Ottawa, operating 2 flights/week on average for this route. A good Air Canada flight deal for London to Ottawa starts from C$ 586 round-trip, up to an average price of C$ 758. Our users have rated Air Canada at 7.1/10.

  • Lufthansa Flights From London to Ottawa

    C$ 618 is the best Lufthansa flight deal from London to Ottawa found on momondo over the last 72 hours. The average Lufthansa ticket price found was closer to C$ 727, however, with flight time and availability significantly affecting the price. Lufthansa (6.8/10 from 7,374 user reviews) flies into Ottawa from London 2 times in an average week so prices can vary.

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Pembroke
Brockville
Smiths Falls
Perth
Wakefield
Calabogie
Petawawa
Winchester
Prescott

Why use momondo?

Why should I use momondo to find a flight deal from London to Ottawa?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Ottawa . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Ottawa with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ottawa from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Ottawa?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ottawa from London.

I’m not ready to book a flight from London to Ottawa right now. Can momondo alert me if prices change?

Price alerts on flights to Ottawa from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ottawa trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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