How long is the flight from Ottawa to London?

A quick flight from Ottawa to London can take about 10h 50m. Virgin Atlantic provides one of the quickest options available for as low as £511. The distance between Ottawa and London is about 3340 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 £491. Air Canada is priced at 10% lower than the current average price of a flight leaving 3 months from now.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 United Airlines (51%), Air Canada (50%) and Aegean Airlines (50%).

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 2 outbound flights to London per day from 1 airline. Ottawa is conveniently located just 6.6 mi from Ottawa’s city center.

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.

£229+ Cheap Flights from Ottawa to London

Cheapflights Tip: The best prices from Ottawa to London are usually found in September or February, booked 74 days in advance, depart on a Friday or Sunday and return on a Friday

Cheap flight deals from Ottawa to London

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 5 October 2026.

Mon 12/1010:00 -

1 stop20h 50m

Wed 14/1011:05 -

2 stops31h 53m

Deal found 4/10£458

Wed 14/1021:00 -

Nonstop6h 35m

Wed 21/1008:40 -

2 stops17h 10m

Deal found 1/10£464

Mon 5/1018:55 -

Nonstop6h 35m

Wed 14/1014:10 -

Nonstop7h 55m

Deal found 2/10£466

Mon 12/1014:00 -

2 stops15h 00m

Wed 21/1008:40 -

2 stops17h 10m

Deal found 1/10£467

Sun 11/1014:35 -

1 stop10h 55m

Wed 14/1014:05 -

1 stop13h 05m

Deal found 4/10£470

Thu 15/1018:55 -

Nonstop6h 35m

Wed 21/1012:40 -

1 stop11h 10m

Deal found 4/10£470

Mon 12/1014:00 -

1 stop13h 35m

Wed 21/1012:40 -

1 stop11h 10m

Deal found 1/10£471

Mon 12/1009:55 -

2 stops19h 05m

Mon 19/1009:30 -

Nonstop7h 55m

Deal found 4/10£472

Mon 5/1018:55 -

Nonstop6h 35m

Wed 14/1009:30 -

1 stop16h 20m

Deal found 30/9£473

Sun 15/1117:10 -

1 stop17h 35m

Sun 22/1110:00 -

1 stop10h 00m

Deal found 1/10£484

Wed 18/1117:10 -

1 stop10h 50m

Wed 25/1110:00 -

1 stop10h 00m

Deal found 3/10£495

Fri 30/1018:25 -

1 stop17h 20m

Fri 6/1110:00 -

1 stop10h 00m

Deal found 1/10£495

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Fri 13/1117:10 -

1 stop17h 35m

Sun 22/1110:00 -

1 stop10h 00m

Deal found 2/10£495

Fri 6/1117:10 -

1 stop10h 50m

Sun 6/1210:00 -

1 stop10h 00m

Deal found 3/10£511

Fri 16/1006:05 -

2 stops19h 50m

Fri 23/1008:00 -

1 stop35h 09m

Deal found 2/10£516

Thu 25/317:40 -

1 stop12h 05m

Mon 29/312:40 -

1 stop14h 35m

Deal found 4/10£720

Thu 19/1117:45 -

1 stop11h 00m

Thu 26/1111:40 -

1 stop15h 22m

Deal found 5/10£732

Thu 25/314:00 -

2 stops15h 50m

Mon 29/316:25 -

2 stops29h 51m

Deal found 4/10£781

Tue 27/1017:40 -

1 stop12h 05m

Tue 3/1111:40 -

1 stop11h 18m

Deal found 1/10£794

Wed 18/1117:10 -

1 stop17h 35m

Wed 25/1110:00 -

1 stop10h 00m

Deal found 4/10£495

Wed 18/1117:10 -

1 stop12h 20m

Wed 25/1106:20 -

1 stop13h 40m

Deal found 4/10£495

Wed 18/1117:10 -

2 stops12h 35m

Wed 25/1106:30 -

2 stops13h 30m

Deal found 4/10£556

Thu 22/1010:35 -

2 stops15h 40m

Mon 26/1016:20 -

2 stops24h 51m

Deal found 2/10£563

Wed 11/1117:10 -

1 stop17h 35m

Tue 17/1116:45 -

1 stop27h 15m

Deal found 1/10£506

Fri 6/1117:10 -

2 stops13h 55m

Sun 6/1206:30 -

2 stops13h 30m

Deal found 1/10£558

Sat 14/1115:10 -

1 stop25h 10m

Mon 23/1118:00 -

1 stop24h 11m

Deal found 2/10£563

Wed 11/1117:10 -

1 stop9h 45m

Tue 17/1117:35 -

1 stop26h 25m

Deal found 1/10£507

Wed 21/1017:10 -

2 stops15h 40m

Tue 10/1110:00 -

2 stops18h 40m

Deal found 5/10£559

Fri 23/1006:00 -

1 stop19h 55m

Fri 30/1016:20 -

1 stop26h 47m

Deal found 2/10£563

Thu 22/1010:35 -

2 stops14h 20m

Fri 30/1012:05 -

2 stops29h 06m

Deal found 2/10£563

Wed 21/1018:01 -

1 stop10h 19m

Mon 2/1118:00 -

2 stops25h 29m

Deal found 30/9£564

Sat 24/1018:01 -

1 stop11h 09m

Sun 1/1113:35 -

1 stop29h 34m

Deal found 1/10£564

Fri 23/1017:10 -

1 stop11h 15m

Sun 1/1110:00 -

1 stop10h 05m

Deal found 30/9£797

Find flight deals from Ottawa to London

Round-trip from	£469
One-way from	£229
Popular in	December
Cheapest in	September
Average price	£539

Air Canada
16/10-23/10
2 total stops
42h 59m total
Ottawa to London

Search Deals

WestJet
26/11-31/12
1 total stop
15h 35m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£10 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Thu 26/11

16:15-12:50

1 stop15h 35m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£236

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Thu 26/11

07:00-12:50

2 stops24h 50m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£239

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Sat 21/11

07:00-12:50

2 stops24h 50m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£261

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sat 21/11

18:55-07:30

2 stops55h 35m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£280

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Fri 16/10

06:50-08:15

3 stops44h 25m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£280

Fastest return journey

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sat 24/10

18:25-10:45

1 stop11h 20m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£284

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Sun 11/10

20:55-18:55

2 stops17h 00m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£286

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Fri 23/10

06:50-10:45

1 stop22h 55m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£298

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 16/10

06:50-08:05

3 stops44h 15m

London Heathrow

Wed 31/12

00:00-18:00

Nonstop0h 00m

£313

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sat 14/11

07:00-10:15

3 stops46h 15m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£341

Flights are sorted by cheapest return flights first.

Deals found on 4/10

Showing 1-10 of 39 resultsSorted by cheapest first

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.

YOW-LON

YOW-LHR

YOW-LGW

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

YOW-LON

YOW-LHR

YOW-LGW

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

Currently, September is the cheapest month in which you can book a flight from Ottawa to London (average of £454). Flying from Ottawa to London in December is currently the most expensive (average of £723). 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?

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?

Airfare is below average for this route at the moment.

Ottawa to London flights typically cost between £475 and £625 in October.
The cheapest return price found within the last 5 days was £469 on Multiple Airlines (16 Oct–23 Oct).

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

Toronto (YYZ) – chosen by Cheapflights users on 58% of one-stop itineraries from Ottawa to London on Cheapflights.

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

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £477.

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

Flights via Paris (CDG) have the shortest average one-way travel time for one-stop routes: 9h 36m.

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

Flights via Paris (CDG) offer the fastest connection on this route, with an average stopover time of 1h 27m.

How often are flights from Ottawa to London delayed?

About 28% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 132 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?

Tuesday tends to have the lowest number of delays on this route, whereas Friday 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 Transat have had the lowest number of delays on this route, with just 20% of flights being delayed.

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

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

Reviews of airlines servicing London

Check out reviews from past customers who have flown with Air Transat and 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 Transat

7.7

Good

583 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Paul,Jul 2026

YUL - LGW

Had to bus to the plane which made priority boarding at the back of the bus

Air Transat

7.7

Good

583 reviews

Air Transat

7.7

Good

583 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Paul,Jul 2026

YUL - LGW

Had to bus to the plane which made priority boarding at the back of the bus

Air Canada

7.1

Good

11,722 reviews

Air Transat

7.7

Good

583 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Paul,Jul 2026

YUL - LGW

Had to bus to the plane which made priority boarding at the back of the bus

Related info for your journey

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 2 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 10h 50m. Virgin Atlantic provides one of the quickest options available for as low as £511. The distance between Ottawa and London is about 3340 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 £491. Air Canada is priced at 10% 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 United Airlines (51%), Air Canada (50%) and Aegean Airlines (50%).
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, September is the cheapest month in which you can book a flight from Ottawa to London (average of £454). Flying from Ottawa to London in December is currently the most expensive (average of £723). 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

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Top airline flying from Ottawa to London

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest£491	Average£652	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights

Fly with Cheapflights

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.

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Cheap flights from Ottawa to London from £229

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ottawa to London

Cheapest flights from Ottawa to LondonExplore 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 5 October 2026.

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 5 October 2026.

Best flights from Ottawa to LondonDiscover carefully curated flight deals from Ottawa to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Direct flights from Ottawa to LondonExplore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Last-minute flights from Ottawa to LondonDiscover last-minute flight deals from Ottawa to London. Data last updated 5 October 2026 and is based on user searches.

Discover last-minute flight deals from Ottawa to London. Data last updated 5 October 2026 and is based on user searches.

One-way flights from Ottawa to LondonSearch for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Find flight deals from Ottawa to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to London that are best for you.

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.

Cheapflights Insights

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

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 5 October 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?

Airfare is below average for this route at the moment.

Ottawa to London flights typically cost between £475 and £625 in October.The cheapest return price found within the last 5 days was £469 on Multiple Airlines (16 Oct–23 Oct).

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 58% 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.

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £477.

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 Paris (CDG) have the shortest average one-way travel time for one-stop routes: 9h 36m.

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 Paris (CDG) offer the fastest connection on this route, with an average stopover time of 1h 27m.

How often are flights from Ottawa to London delayed?

About 28% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 132 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?

Tuesday tends to have the lowest number of delays on this route, whereas Friday 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 Transat have had the lowest number of delays on this route, with just 20% of flights being delayed.

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

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

Reviews of airlines servicing London

Check out reviews from past customers who have flown with Air Transat and 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.

Related info for your journey

What airport do you fly from for flights from Ottawa to London?

How long is the flight from Ottawa to London?

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

What are the most popular routes from Ottawa to London?

What are the most reliable airlines from Ottawa to London?

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

How can I find direct flights from Ottawa to London?

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

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

Travelling to a place near London?

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.

Alternative routes for Ottawa to London

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to London by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Ottawa to London by cabin class

Find flights from Ottawa to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 October 2026.

Ottawa and London flights

Browse other Ottawa and London flight options. Last updated on 5 October 2026.

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 5 October 2026.

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 October 2026.

Direct flights from Ottawa to London
Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 October 2026.

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 5 October 2026 and is based on user searches.

One-way flights from Ottawa to London
Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 5 October 2026.

Ottawa to London flights typically cost between £475 and £625 in October.
The cheapest return price found within the last 5 days was £469 on Multiple Airlines (16 Oct–23 Oct).