£264 Cheap Flights from Ottawa (YOW) to London (LHR)

View £264 flight on Wed, 30 Jul 2025Opens in a new window

Popular airlines from Ottawa International Airport (YOW) to Heathrow Airport (LHR)

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

Prices were available within the past 7 days and start at £264 for one-way flights and £525 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, 6 Oct - Tue, 21 Oct
YOW
Ottawa
LHR
London
£525 Return, found 5 days ago
£525
Return
found 5 days ago
Select Air Canada flight, departing Mon, 6 Oct from Ottawa to London, returning Tue, 21 Oct, priced at £525 found 5 days ago
Air Canada
Mon, 6 Oct - Tue, 21 Oct
YOW
Ottawa
LHR
London
£530 Return, found 5 days ago
£530
Return
found 5 days ago
Select Air Canada flight, departing Mon, 6 Oct from Ottawa to London, returning Tue, 21 Oct, priced at £530 found 5 days ago
Air Canada
Mon, 6 Oct - Tue, 21 Oct
YOW
Ottawa
LHR
London
£535 Return, found 5 days ago
£535
Return
found 5 days ago
Select Air Canada flight, departing Mon, 6 Oct from Ottawa to London, returning Tue, 21 Oct, priced at £535 found 5 days ago
Virgin Atlantic
Tue, 9 Dec - Sun, 28 Dec
YOW
Ottawa
LHR
London
£541 Return, found 11 hours ago
£541
Return
found 11 hours ago
Select Virgin Atlantic flight, departing Tue, 9 Dec from Ottawa to London, returning Sun, 28 Dec, priced at £541 found 11 hours ago
Air France
Tue, 28 Oct - Sun, 9 Nov
YOW
Ottawa
LHR
London
£541 Return, found 4 days ago
£541
Return
found 4 days ago
Select Air France flight, departing Tue, 28 Oct from Ottawa to London, returning Sun, 9 Nov, priced at £541 found 4 days ago
Air Canada
Tue, 28 Oct - Fri, 7 Nov
YOW
Ottawa
LHR
London
£542 Return, found 4 days ago
£542
Return
found 4 days ago
Select Air Canada flight, departing Tue, 28 Oct from Ottawa to London, returning Fri, 7 Nov, priced at £542 found 4 days ago
Air Canada
Thu, 2 Oct - Wed, 8 Oct
YOW
Ottawa
LHR
London
£543 Return, found 1 day ago
£543
Return
found 1 day ago
Select Air Canada flight, departing Thu, 2 Oct from Ottawa to London, returning Wed, 8 Oct, priced at £543 found 1 day ago
Air Canada
Thu, 2 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
£544 Return, found 4 hours ago
£544
Return
found 4 hours ago
Select Air Canada flight, departing Thu, 2 Oct from Ottawa to London, returning Thu, 16 Oct, priced at £544 found 4 hours ago
Aer Lingus
Thu, 29 Jan - Mon, 2 Feb
YOW
Ottawa
LHR
London
£560 Return, found 2 days ago
£560
Return
found 2 days ago
Select Aer Lingus flight, departing Thu, 29 Jan from Ottawa to London, returning Mon, 2 Feb, priced at £560 found 2 days ago
KLM
Tue, 28 Oct - Sat, 8 Nov
YOW
Ottawa
LHR
London
£588 Return, found 4 days ago
£588
Return
found 4 days ago
Select KLM flight, departing Tue, 28 Oct from Ottawa to London, returning Sat, 8 Nov, priced at £588 found 4 days ago

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

February is typically the cheapest month to fly

From £427 - £1,034 per traveller.

Graph displaying average flight prices per month

Flight from Ottawa to London route information
Origin airport
Macdonald-Cartier Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Austrian Airlines, Brussels Airlines, Delta, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
£525
Distance
5315 km
Average flight time
6 hours 35 mins

Compare flights from Ottawa to London easily and book with confidence

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

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 Macdonald-Cartier Intl. (YOW) to Heathrow (LHR)

The easiest way to view the best deals on flights from Ottawa to London 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 Macdonald-Cartier Intl. to Heathrow start at just £525 and range up to £588.  

To find an even better deal, try  

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

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

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Macdonald-Cartier Intl. to Heathrow 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.  

Frequently asked questions

How much is a flight from Ottawa International Airport to Heathrow Airport (LHR)?
Round-trip tickets from Ottawa Intl. Airport to London Heathrow start from £525. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year — book today to avoid missing 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 YOW to Heathrow Airport (LHR)?
Each air carrier has its own terms and conditions. If you do decide to cancel, follow the instructions on our Customer Service Portal.
How do I find cheap flights from YOW to Heathrow 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 YOW to Heathrow Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Ottawa Intl. Airport to London Heathrow?
You'll have 5,400 kilometres to cover on the long-haul Ottawa to Hounslow route. Wear layers of comfortable clothes and consider taking earplugs and a sleep mask.
Which airlines fly direct from Macdonald-Cartier Intl. Airport (YOW) to Heathrow Airport?
If you want to fly straight from Ottawa Intl. Airport to LHR, you'll have to book a flight with one or more stops. Unfortunately, there aren't any airlines that fly directly between these airports.
Are Ottawa International Airport to LHR flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Ottawa International Airport to Heathrow Airport can be hit-or-miss. You may be able to score a great bargain, but you could also miss out entirely! If you'd prefer to play it safe and start your trip planning early on, Expedia compares flight deals up to a year in advance. Just keep in mind that not all airlines advertise their prices that far in advance. Our suggestion? Check back often as updates are made frequently.

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£541.18
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