Cheap flights from London to Ottawa from C$ 436

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 15/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

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Find the cheapest flights from London to Ottawa

Cheap round-trip flights

 Logo
5:50 p.m. - 12:22 a.m.LHR-YOW
11h 32m1 stop
 Logo
5:15 p.m. - 9:25 p.m.YOW-LHR
23h 10m1 stop
C$ 808
Find Deal
Thu, 9 Oct - Mon, 20 Oct
 Logo
9:30 a.m. - 12:22 a.m.LHR-YOW
19h 52m2 stops
 Logo
5:40 a.m. - 11:20 a.m.YOW-LHR
24h 40m1 stop
C$ 825
Find Deal
Wed, 15 Oct - Thu, 6 Nov
KLM Logo
5:50 p.m. - 12:22 a.m.LHR-YOW
11h 32m1 stop
KLM Logo
5:20 p.m. - 10:45 a.m.YOW-LHR
12h 25m2 stops
C$ 835KLM
Find Deal
Wed, 15 Oct - Thu, 6 Nov
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$ 836WestJet
Find Deal
Sat, 11 Oct - Sat, 18 Oct
Air Canada Logo
9:00 a.m. - 10:18 p.m.LHR-YOW
18h 18m2 stops
Air Canada Logo
12:05 p.m. - 7:10 a.m.YOW-LHR
15h 05m2 stops
C$ 857Air Canada
Find Deal
Thu, 5 Mar - Sun, 8 Mar
Air Canada Logo
6:50 a.m. - 1:51 p.m.LHR-YOW
12h 01m2 stops
Air Canada Logo
9:55 p.m. - 9:00 p.m.YOW-LHR
18h 05m2 stops
C$ 868Air Canada
Find Deal
Thu, 9 Oct - Sun, 12 Oct
KLM Logo
6:30 a.m. - 4:10 p.m.LHR-YOW
13h 40m2 stops
KLM Logo
5:20 p.m. - 10:45 a.m.YOW-LHR
12h 25m2 stops
C$ 871KLM
Find Deal
Wed, 29 Oct - Wed, 5 Nov
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$ 893WestJet
Find Deal
Wed, 1 Oct - Mon, 6 Oct
Air Transat Logo
11:40 a.m. - 12:41 a.m.LGW-YOW
17h 01m1 stop
Air Transat Logo
6:55 p.m. - 9:45 a.m.YOW-LGW
9h 50m1 stop
C$ 958Air Transat
Find Deal
Thu, 30 Oct - Thu, 6 Nov
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$ 959Air Transat
Find Deal
Wed, 1 Oct - Mon, 6 Oct

Lufthansa flights from London to Ottawa

Our best Lufthansa deals on London to Ottawa flight tickets
Lufthansa
22 Oct
LHR12:40 p.m.London Heathrow
7h 20m
YOW3:00 p.m.Ottawa
25 Oct
YOW7:50 p.m.Ottawa
44h 45m
2 stops
LHR9:35 p.m.London Heathrow
Lufthansa
11 Oct
LHR12:40 p.m.London Heathrow
7h 20m
YOW3:00 p.m.Ottawa
18 Oct
YOW5:55 p.m.Ottawa
31h 40m
1 stop
LHR6:35 a.m.London Heathrow
Lufthansa
9 Oct
LHR2:05 p.m.London Heathrow
7h 20m
YOW4:25 p.m.Ottawa
20 Oct
YOW6:55 p.m.Ottawa
6h 35m
LHR6:30 a.m.London Heathrow

Air Canada flights from London to Ottawa

Our best Air Canada deals on London to Ottawa flight tickets
Air Canada
5 Mar
LHR9:00 a.m.London Heathrow
18h 18m
2 stops
YOW10:18 p.m.Ottawa
8 Mar
YOW12:05 p.m.Ottawa
15h 05m
2 stops
LHR7:10 a.m.London Heathrow
Air Canada
9 Oct
LHR6:50 a.m.London Heathrow
12h 01m
2 stops
YOW1:51 p.m.Ottawa
12 Oct
YOW9:55 p.m.Ottawa
18h 05m
2 stops
LHR9:00 p.m.London Heathrow
Air Canada
30 Sep
LHR6:50 a.m.London Heathrow
12h 01m
2 stops
YOW1:51 p.m.Ottawa
27 Nov
YOW10:20 a.m.Ottawa
15h 50m
2 stops
LHR7:10 a.m.London Heathrow

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 15 September 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

LHR - YOW

LHRYOW

London Heathrow

Thu 9/10

5:50 p.m.-12:22 a.m.

1 stop11h 32m

Ottawa

Mon 20/10

5:15 p.m.-9:25 p.m.

1 stop23h 10m

C$ 808

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 15/10

9:30 a.m.-12:22 a.m.

2 stops19h 52m

Ottawa

Thu 6/11

5:40 a.m.-11:20 a.m.

1 stop24h 40m

C$ 825

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 15/10

5:50 p.m.-12:22 a.m.

1 stop11h 32m

Ottawa

Thu 6/11

5:20 p.m.-10:45 a.m.

2 stops12h 25m

C$ 835

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 11/10

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

2 stops18h 37m

Ottawa

Sat 18/10

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

2 stops22h 30m

C$ 836

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 5/3

9:00 a.m.-10:18 p.m.

2 stops18h 18m

Ottawa

Sun 8/3

12:05 p.m.-7:10 a.m.

2 stops15h 05m

C$ 857

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 9/10

6:50 a.m.-1:51 p.m.

2 stops12h 01m

Ottawa

Sun 12/10

9:55 p.m.-9:00 p.m.

2 stops18h 05m

C$ 868

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 29/10

6:30 a.m.-4:10 p.m.

2 stops13h 40m

Ottawa

Wed 5/11

5:20 p.m.-10:45 a.m.

2 stops12h 25m

C$ 871

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 1/10

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

2 stops18h 37m

Ottawa

Mon 6/10

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

2 stops22h 30m

C$ 893

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 30/10

11:40 a.m.-12:41 a.m.

1 stop17h 01m

Ottawa

Thu 6/11

6:55 p.m.-9:45 a.m.

1 stop9h 50m

C$ 958

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 1/10

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

1 stop13h 20m

Ottawa

Mon 6/10

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

1 stop12h 40m

C$ 959

Flights are sorted by cheapest round-trip flights 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 typical price of a round-trip flight between London and Ottawa?

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$ 871. 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$ 884.

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$ 1,018. Flights from London to Ottawa on a Saturday will generally be more expensive and average around C$ 1,317. 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$ 1,018. At noon is when there is more demand to fly to Ottawa, so prices are often more expensive at around C$ 1,120 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$ 1,028 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$ 720 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 48% 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 September 2025, prices for London to Ottawa flights are approximately 15% cheaper 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$ 1,008

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$ 1,008. The best round-trip flight deal from London to Ottawa found on momondo in the last 72 hours is C$ 1,007.
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)
  • 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$ 737Free CancellationRating
7.4
1,469 reviews
Search Air France flights
Air CanadaPriceFrom C$ 812Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
LufthansaPriceFrom C$ 856Free CancellationRating
6.8
7,407 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 4 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$ 757. 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$ 698, however, with flight time and availability significantly affecting the price. Lufthansa (6.8/10 from 7,407 user reviews) flies into Ottawa from London 4 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
Prescott
Petawawa
Winchester

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

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1 adult
Wed 15/10
Wed 22/10

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