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Cheap flights from London to Ottawa from C$ 403

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 69 days in advance, depart on a Monday or Sunday and return on a Tuesday

Cheap flight deals from London to Ottawa

Enter your travel dates to find the best prices.

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 4 August 2026.

Sun 13/912:40 p.m.
LGW
-
YOW
1 stop12h 20m
Air Transat
Fri 18/97:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 1/8C$ 811
Sat 12/99:40 a.m.
LGW
-
YOW
1 stop19h 45m
Air Transat
Sat 26/97:00 a.m.
YOW
-
LGW
1 stop22h 45m
Air Transat
Deal found 1/8C$ 814
Tue 15/92:05 p.m.
LHR
-
YOW
1 stop13h 05m
Multiple Airlines
Tue 22/92:45 p.m.
YOW
-
LHR
2 stops20h 50m
Multiple Airlines
Deal found 31/7C$ 814
Thu 1/106:50 a.m.
LHR
-
YOW
2 stops17h 05m
United Airlines
Tue 13/107:30 p.m.
YOW
-
LHR
2 stops14h 10m
United Airlines
Deal found 3/8C$ 816
Wed 9/99:40 a.m.
LGW
-
YOW
1 stop15h 20m
Air Transat
Sun 20/97:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 1/8C$ 818
Fri 11/99:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Tue 15/97:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 31/7C$ 820
Fri 4/99:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Thu 10/94:00 p.m.
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 1/8C$ 821
Wed 16/912:40 p.m.
LHR
-
YOW
2 stops13h 04m
Air Canada
Wed 23/92:45 p.m.
YOW
-
LHR
1 stop10h 45m
Air Canada
Deal found 2/8C$ 821
Tue 8/99:40 a.m.
LGW
-
YOW
Nonstop8h 00m
Air Transat
Tue 15/97:40 p.m.
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 1/8C$ 823
Thu 10/95:55 p.m.
LHR
-
YOW
2 stops30h 04m
United Airlines
Thu 17/95:57 p.m.
YOW
-
LHR
2 stops17h 28m
United Airlines
Deal found 1/8C$ 824
Mon 14/126:30 a.m.
LHR
-
YOW
2 stops13h 30m
Multiple Airlines
Tue 29/125:10 p.m.
YOW
-
LHR
1 stop9h 45m
Multiple Airlines
Deal found 3/8C$ 825
Sun 4/1011:35 a.m.
LGW
-
YOW
1 stop11h 00m
Air Transat
Tue 13/104:00 p.m.
YOW
-
LGW
1 stop13h 45m
Air Transat
Deal found 30/7C$ 828

Find 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 4 August 2026.

Round-trip from

C$ 811

One-way from

C$ 403

Popular in

December

Cheapest in

June

Average price

C$ 1,061

Good round-trip deal

C$ 772 or less

Good one-way deal

C$ 471 or less
Air Transat
  • Air Transat
  • 13/9-18/9
  • 1 total stop
  • 19h 35m total
  • London to Ottawa
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 31h 50m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Ottawa.
Search Deals
Price to beat on a one-way flight from London (LON) to Ottawa.
Search Deals

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 4 August 2026.
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

Cheapest round-trip

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 12/9

9:40 a.m.-12:25 a.m.

1 stop19h 45m

Ottawa

Sat 26/9

7:00 a.m.-10:45 a.m.

1 stop22h 45m

C$ 814
Quickest round-trip

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 11/9

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

Nonstop8h 00m

Ottawa

Sun 20/9

7:40 p.m.-7:55 a.m.

Nonstop7h 15m

C$ 900

LondonOttawa

STN - YOW

STNYOW

London Stansted

Fri 28/8

10:50 p.m.-5:35 p.m.

2 stops23h 45m

Ottawa

Fri 4/9

6:55 a.m.-11:20 p.m.

2 stops35h 25m

C$ 976

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 11/9

5:50 p.m.-12:20 a.m.

1 stop11h 30m

Ottawa

Sun 20/9

6:25 p.m.-1:50 p.m.

2 stops14h 25m

C$ 990

LondonOttawa

STN - YOW

STNYOW

London Stansted

Wed 16/9

9:30 p.m.-8:00 p.m.

3 stops27h 30m

Ottawa

Wed 30/9

6:55 a.m.-10:50 p.m.

2 stops34h 55m

C$ 990

LondonOttawa

STN - YOW

STNYOW

London Stansted

Sun 13/9

6:35 a.m.-8:00 p.m.

2 stops18h 25m

Ottawa

Sun 20/9

8:55 p.m.-10:20 p.m.

2 stops20h 25m

C$ 1,009

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 20/8

5:00 p.m.-3:00 p.m.

1 stop27h 00m

Ottawa

Mon 31/8

5:10 p.m.-9:40 a.m.

1 stop11h 30m

C$ 1,103

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 17/12

1:05 p.m.-12:42 a.m.

1 stop16h 37m

Ottawa

Tue 5/1

5:40 a.m.-6:20 a.m.

2 stops43h 40m

C$ 1,119

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 28/8

7:50 p.m.-5:35 p.m.

2 stops50h 45m

Ottawa

Fri 4/9

6:55 a.m.-8:50 a.m.

2 stops44h 55m

C$ 1,145

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 29/11

11:40 a.m.-10:08 p.m.

1 stop15h 28m

Ottawa

Fri 23/4

5:40 p.m.-10:45 a.m.

1 stop12h 05m

C$ 1,147

Flights are sorted by cheapest round-trip flights first.

Deals found on 31/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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

What is the cheapest month to book a flight from London to Ottawa?

Currently, May is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 828). Flying from London to Ottawa in December is currently the most expensive (average of C$ 1,313). 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 4 August 2026.

When flying from London to Ottawa, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from London to Ottawa?

Airfare is below average for this route at the moment.
London to Ottawa flights typically cost between C$ 955 and C$ 1,241 in September.
The cheapest round-trip price found within the last 5 days was C$ 811 on Air Transat (13 Sep-18 Sep).

What’s the top layover airport for flights from London to Ottawa?

Share of one-stop round-trip flights from London to Ottawa chosen by Cheapflights users in the past 12 months, using the same layover each way.

Paris (CDG) – chosen by Cheapflights users on 45% of one-stop itineraries from London to Ottawa on Cheapflights.

What’s the cheapest layover airport for flights from London to Ottawa?

Average round-trip fare for 1-stop flights from London to Ottawa, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 844.

What’s the fastest layover option from London to Ottawa?

Shortest average travel time for 1-stop one-way flights from London to Ottawa, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Paris (CDG) have the shortest average one-way travel time for 1-stop routes: 11h 13m.

Which airport typically offers the quickest layover for flights from London to Ottawa?

Average layover duration for 1-stop one-way flights from London to Ottawa, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 25m.

How often are flights from London to Ottawa delayed?

About 11% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 202 minutes.

What is the most punctual flight time for London to Ottawa flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Ottawa flights?

Over the past year, Air Canada has had the lowest number of delays on this route, with just 11% of flights being delayed.

How far ahead should I book a flight from London to Ottawa?

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 66 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 4 August 2026.
Check out reviews from past customers who have flown with Air Transat,Air Canada, andLufthansa from London to Ottawa to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.8
Good
569 reviews
Check prices

Crew

8.5

Comfort

7.3

Food

6.8

Entertainment

7.1

Overall

7.8

Boarding

8.0

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Transat
7.8
Good
569 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Crew

8.5

Comfort

7.3

Food

6.8

Entertainment

7.1

Overall

7.8

Boarding

8.0

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Canada
7.1
Good
11,424 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Crew

8.5

Comfort

7.3

Food

6.8

Entertainment

7.1

Overall

7.8

Boarding

8.0

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Lufthansa
6.8
Okay
8,176 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Crew

8.5

Comfort

7.3

Food

6.8

Entertainment

7.1

Overall

7.8

Boarding

8.0

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.

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.

  • How long is the flight from London to Ottawa?

    A quick flight from London to Ottawa can take about 11h 30m. Air Transat provides one of the quickest options available for as low as C$ 990. Airlines will cover a distance of 5343 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Our cheapest airline available from London to Ottawa is Air Transat. Our recent data shows that you can find tickets from as low as C$ 710 on this airline. An additional option worth looking into is Air Canada, starting at C$ 809. These flights start at 30% lower than the current average price 3 months from now.

  • 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 most reliable airlines from London to Ottawa?

    Before booking your flight to Ottawa from London, check out the most reliable airlines to get you to your destination on time: Air Canada (86%), Austrian Airlines (86%), SriLankan Airlines( 86%).

  • What are the cheapest flights from London to Ottawa?

    The cheapest flight price from London to Ottawa is C$ 690. On average you can expect to pay C$ 1,068. The most popular route, (London Heathrow - Ottawa), can usually be booked for C$ 738.

  • 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, May is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 828). Flying from London to Ottawa in December is currently the most expensive (average of C$ 1,313). 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 Ottawa?

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

Browse thousands of different options on Cheapflights for your next trip

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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 4 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 710AverageC$ 939FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 809AverageC$ 1,021FlexibilityNo 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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