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Cheap flights from London to Ottawa from C$ 431

LON — YOW
18 Oct — 25 Oct1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 54 days in advance, depart on a Sunday or Friday 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

Thu 24/93:00 p.m. -
2 stops14h 20m
Tue 29/95:25 p.m. -
1 stop12h 05m
Deal found 17/9C$ 765
Wed 21/106:15 a.m. -
1 stop13h 45m
Wed 28/106:25 p.m. -
1 stop18h 10m
Deal found 16/9C$ 767
Mon 12/105:50 p.m. -
1 stop11h 30m
Fri 30/106:25 p.m. -
2 stops13h 40m
Deal found 17/9C$ 771
Thu 1/109:30 a.m. -
Nonstop7h 55m
Wed 7/109:00 p.m. -
Nonstop6h 35m
Deal found 17/9C$ 772
Wed 7/102:10 p.m. -
Nonstop7h 55m
Wed 14/109:00 p.m. -
Nonstop6h 35m
Deal found 16/9C$ 775
Tue 6/1012:40 p.m. -
1 stop11h 10m
Wed 14/109:00 p.m. -
Nonstop6h 35m
Deal found 15/9C$ 776
Fri 2/102:05 p.m. -
1 stop11h 43m
Mon 5/106:55 p.m. -
Nonstop6h 35m
Deal found 17/9C$ 778
Thu 24/95:50 p.m. -
1 stop11h 30m
Tue 29/95:25 p.m. -
1 stop9h 30m
Deal found 17/9C$ 779
Fri 2/102:05 p.m. -
2 stops12h 47m
Tue 6/109:05 a.m. -
1 stop16h 25m
Deal found 17/9C$ 782
Thu 1/109:30 a.m. -
Nonstop7h 55m
Thu 8/107:00 a.m. -
1 stop18h 35m
Deal found 17/9C$ 783
Wed 23/124:45 p.m. -
1 stop27h 15m
Wed 6/15:10 p.m. -
1 stop10h 50m
Deal found 16/9C$ 785
Fri 2/109:40 a.m. -
Nonstop8h 00m
Wed 7/108:55 p.m. -
1 stop30h 00m
Deal found 17/9C$ 796

Find flight deals from London to Ottawa

Round-trip from

C$ 767

One-way from

C$ 431

Popular in

December

Cheapest in

June

Average price

C$ 920

Good one-way deal

C$ 393 or less
Air France
  • Air France
  • 21/10-28/10
  • 2 total stops
  • 31h 55m total
  • London to Ottawa
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Air Transat
  • Air Transat
  • 3/10-31/12
  • 1 total stop
  • 19h 45m total
  • London to Ottawa
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 97 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 30 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a one-way flight from London (LON) to Ottawa.
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Cheapflights Fare Finder

 
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
Quickest round-trip

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Fri 16/10

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

Nonstop8h 00m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 445

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Fri 25/9

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

1 stop16h 45m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 462

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sun 4/10

11:35 a.m.-5:35 p.m.

1 stop11h 00m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 505

LondonOttawa

STN London Stansted - YOW Ottawa

STNYOW

London Stansted

Mon 2/11

6:10 a.m.-12:01 a.m.

3 stops46h 51m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 512

LondonOttawa

STN London Stansted - YOW Ottawa

STNYOW

London Stansted

Thu 5/11

4:55 p.m.-12:01 a.m.

3 stops36h 06m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 520

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Mon 2/11

4:45 p.m.-12:01 a.m.

2 stops36h 16m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 536

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Tue 10/11

4:45 p.m.-12:01 a.m.

2 stops36h 16m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 550

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Wed 25/11

4:45 p.m.-12:01 a.m.

2 stops36h 16m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 557

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Wed 11/11

8:05 a.m.-12:01 a.m.

2 stops20h 56m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 562

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sun 29/11

2:05 p.m.-12:01 a.m.

2 stops38h 56m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 575

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

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

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, June is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 830). Flying from London to Ottawa in December is currently the most expensive (average of C$ 1,290). 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?

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 typical for this route at the moment.
London to Ottawa flights typically cost between C$ 718 and C$ 1,046 in October.
The cheapest round-trip price found within the last 5 days was C$ 767 on Air France (21 Oct-28 Oct).

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

Paris (CDG) – chosen by Cheapflights users on 50% of one-stop itineraries from London to Ottawa on Cheapflights.

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

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 841.

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

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?

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 Saturday 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 Transat has had the lowest number of delays on this route, with just 10% 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 74 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Ottawa

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
7.7
Good
579 reviews
Check prices

Boarding

8.0

Crew

8.5

Overall

7.7

Food

6.8

Entertainment

7.1

Comfort

7.3

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
7.7
Good
579 reviews
Air Transat
7.7
Good
579 reviews
Check prices

Boarding

8.0

Crew

8.5

Overall

7.7

Food

6.8

Entertainment

7.1

Comfort

7.3

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
11,649 reviews
Air Transat
7.7
Good
579 reviews
Check prices

Boarding

8.0

Crew

8.5

Overall

7.7

Food

6.8

Entertainment

7.1

Comfort

7.3

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
8,231 reviews
Air Transat
7.7
Good
579 reviews
Check prices

Boarding

8.0

Crew

8.5

Overall

7.7

Food

6.8

Entertainment

7.1

Comfort

7.3

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

  • 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. 3 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 2 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 8h. KLM provides one of the quickest options available for as low as C$ 837. Airlines will cover a distance of 5375 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$ 708 on this airline. Additional options worth looking into are Lufthansa and Air Canada, starting at C$ 741 and C$ 781 round-trip. 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 City - Ottawa or London Gatwick - 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: Aegean Airlines (88%), Air Canada (85%), Austrian Airlines( 85%).

  • 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, June is the cheapest month in which you can book a flight from London to Ottawa (average of C$ 830). Flying from London to Ottawa in December is currently the most expensive (average of C$ 1,290). 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

Alternative routes for London to Ottawa

Heathrow to Pearson Intl flights
Gatwick to Pearson Intl flights
Stansted to Pearson Intl flights
London City to Pearson Intl flights
Luton to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Heathrow to Ottawa flights
Edinburgh to Pearson Intl flights
Southend to Pearson Intl flights
Southend to Pierre Elliott Trudeau Intl flights
Gatwick to Ottawa flights
Birmingham to Pearson Intl flights
Manchester to Pierre Elliott Trudeau Intl flights
Southampton to Pearson Intl flights
Edinburgh to Pierre Elliott Trudeau Intl flights
Heathrow to Hamilton flights
Stansted to Ottawa flights
Newcastle upon Tyne to Pearson Intl flights
Heathrow to London flights
Southampton to Pierre Elliott Trudeau Intl flights
Heathrow to Thunder Bay flights
Leeds to Pearson Intl flights
Manchester to Ottawa flights
Gatwick to Hamilton flights
Bristol to Pearson Intl flights
Newcastle upon Tyne to Pierre Elliott Trudeau Intl flights
Heathrow to Windsor flights
Birmingham to Pierre Elliott Trudeau Intl flights
Birmingham to Ottawa flights
Norwich to Pierre Elliott Trudeau Intl flights
Leeds to Pierre Elliott Trudeau Intl flights
Liverpool to Pierre Elliott Trudeau Intl flights
Leeds to Ottawa flights

Top 3 airlines flying from London to Ottawa

AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 708AverageC$ 935FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapestC$ 741AverageC$ 954FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapestC$ 781AverageC$ 1,008FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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