£439 Cheap Flights from London (LON) to Ottawa (YOW)

View £439 flight on Fri, 29 Aug 2025Opens 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 £439 for one-way flights and £413 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Wed, 10 Sep - Sun, 14 Sep
LHR
London
YOW
Ottawa
£413 Return, found 7 hours ago
£413
Return
found 7 hours ago
Select Virgin Atlantic flight, departing Wed, 10 Sep from London to Ottawa, returning Sun, 14 Sep, priced at £413 found 7 hours ago
KLM
Sun, 19 Oct - Sat, 25 Oct
LHR
London
YOW
Ottawa
£437 Return, found 2 days ago
£437
Return
found 2 days ago
Select KLM flight, departing Sun, 19 Oct from London to Ottawa, returning Sat, 25 Oct, priced at £437 found 2 days ago
KLM
Thu, 10 Jul - Mon, 14 Jul
LHR
London
XDS
Ottawa
£447 Return, found 3 days ago
£447
Return
found 3 days ago
Select KLM flight, departing Thu, 10 Jul from London to Ottawa, returning Mon, 14 Jul, priced at £447 found 3 days ago
KLM
Wed, 9 Jul - Mon, 14 Jul
LCY
London
XDS
Ottawa
£451 Return, found 1 day ago
£451
Return
found 1 day ago
Select KLM flight, departing Wed, 9 Jul from London to Ottawa, returning Mon, 14 Jul, priced at £451 found 1 day ago
Air France
Fri, 19 Sep - Sun, 28 Sep
LHR
London
YOW
Ottawa
£456 Return, found 1 day ago
£456
Return
found 1 day ago
Select Air France flight, departing Fri, 19 Sep from London to Ottawa, returning Sun, 28 Sep, priced at £456 found 1 day ago
Swiss International Air Lines
Mon, 3 Nov - Mon, 10 Nov
LHR
London
YOW
Ottawa
£477 Return, found 3 days ago
£477
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Mon, 3 Nov from London to Ottawa, returning Mon, 10 Nov, priced at £477 found 3 days ago
Swiss International Air Lines
Thu, 16 Oct - Sun, 19 Oct
LGW
London
YOW
Ottawa
£479 Return, found 4 days ago
£479
Return
found 4 days ago
Select Swiss International Air Lines flight, departing Thu, 16 Oct from London to Ottawa, returning Sun, 19 Oct, priced at £479 found 4 days ago
Austrian Airlines
Fri, 19 Sep - Fri, 26 Sep
LHR
London
YOW
Ottawa
£483 Return, found 2 days ago
£483
Return
found 2 days ago
Select Austrian Airlines flight, departing Fri, 19 Sep from London to Ottawa, returning Fri, 26 Sep, priced at £483 found 2 days ago
Brussels Airlines
Tue, 17 Feb - Tue, 3 Mar
LHR
London
YOW
Ottawa
£484 Return, found 3 days ago
£484
Return
found 3 days ago
Select Brussels Airlines flight, departing Tue, 17 Feb from London to Ottawa, returning Tue, 3 Mar, priced at £484 found 3 days ago
Lufthansa
Fri, 13 Feb - Fri, 27 Feb
LHR
London
YOW
Ottawa
£485 Return, found 3 days ago
£485
Return
found 3 days ago
Select Lufthansa flight, departing Fri, 13 Feb from London to Ottawa, returning Fri, 27 Feb, priced at £485 found 3 days ago

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

September is typically the cheapest month to fly

From £375 - £566 per traveller.

Graph displaying average flight prices per month

Flight from London to Ottawa route information
Origin airport
Heathrow
Destination airport
Macdonald-Cartier Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, Air Transat, Austrian Airlines, Brussels Airlines, Delta, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
£413
Distance
5315 km

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 £413 and range up to £671.  

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.  

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 £413. 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.

Explore a world of travel with Expedia

London Airports

London

Heathrow to Ottawa
£412.95
Gatwick to Ottawa
£478.78

Southampton

Southampton to Ottawa
£1,240.24
*Available to Expedia members.