Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ottawa to London from £209

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LON
9 Mar — 16 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to London are usually found in February or January, booked 54 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Ottawa to London

Enter your travel dates to find the best prices.

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 February 2026.

Sat 28/218:50
YOW
-
LGW
1 stop9h 55m
Air Transat
Sat 7/311:40
LGW
-
YOW
1 stop24h 43m
Air Transat
Deal found 6/2£401
Sat 7/306:45
YOW
-
LGW
1 stop22h 00m
Air Transat
Sat 14/311:40
LGW
-
YOW
1 stop11h 48m
Air Transat
Deal found 5/2£402
Sun 1/310:00
YOW
-
LGW
1 stop18h 45m
Air Transat
Sat 7/311:40
LGW
-
YOW
1 stop24h 43m
Air Transat
Deal found 7/2£406
Mon 23/218:50
YOW
-
LGW
1 stop9h 55m
Porter Airlines
Tue 3/311:40
LGW
-
YOW
1 stop11h 43m
Porter Airlines
Deal found 4/2£408
Sat 28/218:50
YOW
-
LGW
1 stop9h 55m
Air Transat
Sun 8/311:40
LGW
-
YOW
1 stop24h 43m
Air Transat
Deal found 4/2£412
Fri 27/215:05
YOW
-
LGW
1 stop13h 40m
Air Transat
Fri 6/311:40
LGW
-
YOW
1 stop25h 43m
Air Transat
Deal found 6/2£414
Mon 6/405:40
YOW
-
LGW
2 stops33h 25m
Multiple Airlines
Mon 20/408:40
LGW
-
YOW
2 stops20h 59m
Multiple Airlines
Deal found 4/2£416
Fri 29/519:40
YOW
-
LGW
Nonstop7h 15m
Air Transat
Sun 14/609:40
LGW
-
YOW
Nonstop8h 00m
Air Transat
Deal found 6/2£417
Sun 22/210:00
YOW
-
LGW
1 stop18h 45m
Air Transat
Mon 2/311:40
LGW
-
YOW
1 stop11h 43m
Air Transat
Deal found 3/2£420
Mon 1/607:00
YOW
-
LGW
1 stop19h 55m
Air Transat
Mon 8/612:40
LGW
-
YOW
1 stop12h 20m
Air Transat
Deal found 3/2£422
Mon 17/805:55
YOW
-
LHR
2 stops27h 25m
Multiple Airlines
Wed 19/806:15
LHR
-
YOW
2 stops16h 20m
Multiple Airlines
Deal found 7/2£441
Wed 2/905:55
YOW
-
LHR
2 stops28h 20m
Multiple Airlines
Wed 16/906:15
LHR
-
YOW
2 stops16h 20m
Multiple Airlines
Deal found 6/2£443

Find flight deals from Ottawa to London

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to London (LON). 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 7 February 2026.

Round-trip from

£401

One-way from

£209

Popular in

December

Cheapest in

February

Average price

£482
Air Transat
  • Air Transat
  • 28/2-6/3
  • 2 total stops
  • 35h 38m total
  • Ottawa to London
Search Deals
5/5
  • 5/5
  • 3 total stops
  • 34h 25m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£5 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ottawa to London 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 858,174 searches. Data last updated 7 February 2026.
Use the filters below to find and compare flights from Ottawa to London that are best for you.

Fly from

Ottawa

Fly to

London

Route

Depart

Return

Price

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 24/2

10:00-09:45

1 stop18h 45m

London Gatwick

Wed 4/3

11:40-08:23

1 stop25h 43m

£408

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Fri 29/5

19:40-07:55

Nonstop7h 15m

London Gatwick

Sun 14/6

09:40-12:40

Nonstop8h 00m

£417

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 1/6

07:00-07:55

1 stop19h 55m

London Gatwick

Mon 8/6

12:40-20:00

1 stop12h 20m

£422

OttawaLondon

YOW - LTN

YOWLTN

Ottawa

Sat 23/5

18:25-21:55

2 stops22h 30m

London Luton

Sun 31/5

09:05-17:35

2 stops13h 30m

£445

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Fri 22/5

18:25-23:20

2 stops23h 55m

London Stansted

Fri 5/6

22:50-00:20

3 stops30h 30m

£446

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Sat 23/5

18:25-23:20

2 stops23h 55m

London Stansted

Sun 31/5

08:30-00:20

2 stops20h 50m

£448

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 3/5

18:35-10:45

1 stop11h 10m

London Gatwick

Sun 10/5

12:40-00:25

1 stop16h 45m

£453

OttawaLondon

YOW - STN

YOWSTN

Ottawa

Sun 3/5

18:35-23:25

2 stops23h 50m

London Stansted

Sun 10/5

06:35-20:00

2 stops18h 25m

£458

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 14/5

18:35-21:25

2 stops21h 50m

London Heathrow

Wed 3/6

06:15-20:00

2 stops18h 45m

£460

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Wed 6/5

07:00-10:45

1 stop22h 45m

London Gatwick

Wed 13/5

12:40-20:00

1 stop12h 20m

£468

Flights are sorted by cheapest return flights first.

Deals found on 6/2

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ottawa to London

Have a flexible travel schedule? Discover the best time to fly to London from Ottawa with our price prediction graph.
Estimated return 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 Ottawa to London

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

Use this chart to determine the optimal time to book a return flight from Ottawa to London. Price data was last updated on 30 January 2026.

The price you pay for your flight from Ottawa to London may vary depending on when you book. For the best chance of a lower fare, look to book 54 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 Ottawa to London?

Currently, March is the cheapest month in which you can book a flight from Ottawa to London (average of £147). Flying from Ottawa to London in July is currently the most expensive (average of £474). 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 YOW to LON?

Find hourly flight availability from Ottawa to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 February 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to London as you normally would.

How much does it cost for a return flight from Ottawa to London?

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

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

Toronto (YYZ) – chosen by Cheapflights users on 46% of one-stop itineraries from Ottawa to London on Cheapflights.

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

Average return fare for one-stop flights from Ottawa to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Washington, D.C. (IAD) is the most affordable one-stop option, with an average return flight price of £487.

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

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

Flights via Halifax (YHZ) have the shortest average one-way travel time for one-stop routes: 9h 00m.

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

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

Flights via Halifax (YHZ) offer the fastest connection on this route, with an average stopover time of 1h 16m.

How often are flights from Ottawa to London delayed?

About 22% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 136 minutes.

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

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

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

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

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

Over the past year, Air Canada have had the lowest number of delays on this route, with just 22% of flights being delayed.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 7 February 2026.
Check out reviews from past customers who have flown with Air Canada from Ottawa to London 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 Canada
7.1
Good
10,697 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,697 reviews
Air Canada
7.1
Good
10,697 reviews
Check prices

Crew

7.8

Overall

7.1

Comfort

7.1

Boarding

7.3

Entertainment

6.8

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to London. 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 from for flights from Ottawa to London?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London. On average, Ottawa has 3 outbound flights to London per day from 1 airline. Ottawa is conveniently located just 6.6 mi from Ottawa’s city center.

  • How long is the flight from Ottawa to London?

    A quick flight from Ottawa to London can take about 15h 40m. Air Transat provides one of the quickest options available for as low as £564. The distance between Ottawa and London is about 3339 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Ottawa to London round-trip?

    Cheapflights users have booked flights from Ottawa to London round-trip from £473. Air Canada is priced at 12% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular routes from Ottawa to London?

    While some choose either Ottawa - London Gatwick or Ottawa - London City, Ottawa - London Heathrow is the most popular route from Ottawa to London.

  • What are the most reliable airlines from Ottawa to London?

    The top 3 most reliable airlines when flying from Ottawa to London are Air Canada (33%), Aegean Airlines (33%) and Austrian Airlines (33%).

  • Can I find deals for flights from Ottawa to London that include hotel bookings?

    Yes. In addition to deals on Ottawa to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.

  • Can I find deals for business class flights from Ottawa to London?

    Yes. Cheapflights offers flight deals from Ottawa to London 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 Ottawa to London?

    Currently, March is the cheapest month in which you can book a flight from Ottawa to London (average of £147). Flying from Ottawa to London in July is currently the most expensive (average of £474). 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
Milton Keynes
Croydon
Luton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames
Romford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ottawa to London

Discover the top airline that operate flights from Ottawa to London. 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 858,174 searches. Data last updated 7 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£473Average£605FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ottawa to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ottawa today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ottawa to London?

Cheapflights helps you find that perfect flight to London from Ottawa 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 Ottawa to London with no change fees?

Yes, we can. To see specific flights from Ottawa to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to London become cheaper?

Not ready to book yet? You can track prices for flights from Ottawa to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.