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£259 Cheap Flights from London (LON) to Ottawa (YOW)

View £259 flight on Fri, 4 Sept 2026Opens in a new window

Popular airlines from London to Ottawa, ON (YOW-Macdonald-Cartier Intl.)

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Cheap Flights from London (LON) to Ottawa (YOW)

Prices were available within the past 7 days and start at £259 for one-way flights and £357 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Transat
Fri, 18 Sept - Sun, 20 Sept
LGW
London
YOW
Ottawa
£357 Return, found 4 hours ago
£357
Return
found 4 hours ago
Select Air Transat flight, departing Fri, 18 Sept from London to Ottawa, returning Sun, 20 Sept, priced at £357 found 4 hours ago
Air Transat
Tue, 15 Sept - Tue, 22 Sept
LGW
London
YOW
Ottawa
£359 Return, found 6 hours ago
£359
Return
found 6 hours ago
Select Air Transat flight, departing Tue, 15 Sept from London to Ottawa, returning Tue, 22 Sept, priced at £359 found 6 hours ago
Air Transat
Sun, 20 Sept - Sun, 27 Sept
LGW
London
YOW
Ottawa
£362 Return, found 1 day ago
£362
Return
found 1 day ago
Select Air Transat flight, departing Sun, 20 Sept from London to Ottawa, returning Sun, 27 Sept, priced at £362 found 1 day ago
Air Transat
Fri, 18 Sept - Sun, 20 Sept
LGW
London
YOW
Ottawa
£363 Return, found 4 hours ago
£363
Return
found 4 hours ago
Select Air Transat flight, departing Fri, 18 Sept from London to Ottawa, returning Sun, 20 Sept, priced at £363 found 4 hours ago
Air Canada
Mon, 14 Sept - Fri, 25 Sept
LHR
London
YOW
Ottawa
£387 Return, found 3 days ago
£387
Return
found 3 days ago
Select Air Canada flight, departing Mon, 14 Sept from London to Ottawa, returning Fri, 25 Sept, priced at £387 found 3 days ago
Lufthansa
Thu, 24 Sept - Mon, 5 Oct
LCY
London
YOW
Ottawa
£406 Return, found 4 days ago
£406
Return
found 4 days ago
Select Lufthansa flight, departing Thu, 24 Sept from London to Ottawa, returning Mon, 5 Oct, priced at £406 found 4 days ago
KLM
Mon, 5 Oct - Thu, 15 Oct
LHR
London
YOW
Ottawa
£408 Return, found 1 day ago
£408
Return
found 1 day ago
Select KLM flight, departing Mon, 5 Oct from London to Ottawa, returning Thu, 15 Oct, priced at £408 found 1 day ago
Air France
Tue, 15 Sept - Tue, 22 Sept
LHR
London
YOW
Ottawa
£413 Return, found 6 hours ago
£413
Return
found 6 hours ago
Select Air France flight, departing Tue, 15 Sept from London to Ottawa, returning Tue, 22 Sept, priced at £413 found 6 hours ago
Austrian Airlines
Tue, 22 Sept - Wed, 30 Sept
LHR
London
YOW
Ottawa
£430 Return, found 2 days ago
£430
Return
found 2 days ago
Select Austrian Airlines flight, departing Tue, 22 Sept from London to Ottawa, returning Wed, 30 Sept, priced at £430 found 2 days ago
Lufthansa
Thu, 10 Sept - Mon, 14 Sept
LHR
London
YOW
Ottawa
£438 Return, found 2 days ago
£438
Return
found 2 days ago
Select Lufthansa flight, departing Thu, 10 Sept from London to Ottawa, returning Mon, 14 Sept, priced at £438 found 2 days ago

Find the cheapest month to fly from London (LON) to Ottawa (YOW)

June is typically the cheapest month to fly

From £356 - £650 per traveller.

Frequently asked questions

How much is a flight from London (LON-All Airports) to Ottawa International Airport?
Round-trip flights between London (LON-All Airports) and YOW start from £357. This price is based on fares quoted within the last 7 days on Expedia for flights departing within the next year — book today so you don't miss out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from London (LON-All Airports) to Ottawa International Airport?
Most flights can be conveniently cancelled online, but whether or not you incur a fee all comes down to your airline. If you do have to cancel your holiday, follow the instructions in the Customer Service Portal.
How do I find cheap flights from London (LON-All Airports) to Ottawa International Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for London (LON-All Airports) to Ottawa Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from London (LON-All Airports) to Macdonald-Cartier Intl. Airport (YOW)?
You'll have 5,400 kilometres to cover on the long-haul England to Ottawa route. Wear comfortable clothes and consider taking a travel pillow with you.
Which airlines fly direct from London (LON-All Airports) to Macdonald-Cartier Intl. Airport (YOW)?
There are no direct flights, so you'll have to make at least one stop between London (LON-All Airports) and Ottawa Intl. Airport. Use the layover time to stretch your legs and grab a coffee.
Are London (LON-All Airports) to Ottawa International Airport flight tickets cheaper when they're purchased at the last minute?
Booking your trip from London (LON-All Airports) to YOW last minute could save you some serious cash. However, it might cost you a whole lot more! If you'd prefer not to take the risk, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred air carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.

Travel information

Origin airport
Gatwick
Destination airport
Macdonald-Cartier Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, Air Transat, Austrian Airlines, British Airways, Brussels Airlines, Delta, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic, WestJet
Return price
£356
Distance
5347 km

Book with confidence

Compare flights from London to Ottawa easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Ottawa. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Macdonald-Cartier Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from LON-All Airports to Macdonald-Cartier Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from LON-All Airports (LON) to Macdonald-Cartier Intl. (YOW)

The easiest way to view the best deals on flights from London to Ottawa today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from LON-All Airports to Macdonald-Cartier Intl. start at just £357 and range up to £457.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and Ottawa
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to Ottawa flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from LON-All Airports to Macdonald-Cartier Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to Ottawa easily and book with confidence

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