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£276 Cheap Flights from Ottawa (YOW) to London (LHR)

View £276 flight on Wed, 29 Jul 2026Opens 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 £276 for one-way flights and £476 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, 10 Sept - Mon, 21 Sept
YOW
Ottawa
LHR
London
£476 Return, found 3 days ago
£476
Return
found 3 days ago
Select Air Canada flight, departing Thu, 10 Sept from Ottawa to London, returning Mon, 21 Sept, priced at £476 found 3 days ago
Air Canada
Thu, 10 Sept - Mon, 14 Sept
YOW
Ottawa
LHR
London
£476 Return, found 6 days ago
£476
Return
found 6 days ago
Select Air Canada flight, departing Thu, 10 Sept from Ottawa to London, returning Mon, 14 Sept, priced at £476 found 6 days ago
Air Canada
Thu, 15 Oct - Tue, 20 Oct
YOW
Ottawa
LHR
London
£478 Return, found 4 days ago
£478
Return
found 4 days ago
Select Air Canada flight, departing Thu, 15 Oct from Ottawa to London, returning Tue, 20 Oct, priced at £478 found 4 days ago
Air Canada
Wed, 30 Sept - Mon, 5 Oct
YOW
Ottawa
LHR
London
£479 Return, found 1 day ago
£479
Return
found 1 day ago
Select Air Canada flight, departing Wed, 30 Sept from Ottawa to London, returning Mon, 5 Oct, priced at £479 found 1 day ago
Air Canada
Mon, 21 Sept - Fri, 25 Sept
YOW
Ottawa
LHR
London
£480 Return, found 2 hours ago
£480
Return
found 2 hours ago
Select Air Canada flight, departing Mon, 21 Sept from Ottawa to London, returning Fri, 25 Sept, priced at £480 found 2 hours ago
Air Canada
Wed, 30 Sept - Mon, 5 Oct
YOW
Ottawa
LHR
London
£481 Return, found 1 day ago
£481
Return
found 1 day ago
Select Air Canada flight, departing Wed, 30 Sept from Ottawa to London, returning Mon, 5 Oct, priced at £481 found 1 day ago
Air France
Sat, 17 Oct - Fri, 30 Oct
YOW
Ottawa
LHR
London
£497 Return, found 1 day ago
£497
Return
found 1 day ago
Select Air France flight, departing Sat, 17 Oct from Ottawa to London, returning Fri, 30 Oct, priced at £497 found 1 day ago
British Airways
Fri, 16 Oct - Wed, 21 Oct
YOW
Ottawa
LHR
London
£647 Return, found 4 days ago
£647
Return
found 4 days ago
Select British Airways flight, departing Fri, 16 Oct from Ottawa to London, returning Wed, 21 Oct, priced at £647 found 4 days ago
Aer Lingus
Thu, 31 Dec - Sun, 31 Jan
YOW
Ottawa
LHR
London
£659 Return, found 7 hours ago
£659
Return
found 7 hours ago
Select Aer Lingus flight, departing Thu, 31 Dec from Ottawa to London, returning Sun, 31 Jan, priced at £659 found 7 hours ago
Lufthansa
Mon, 19 Oct - Mon, 2 Nov
YOW
Ottawa
LHR
London
£663 Return, found 1 day ago
£663
Return
found 1 day ago
Select Lufthansa flight, departing Mon, 19 Oct from Ottawa to London, returning Mon, 2 Nov, priced at £663 found 1 day ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gatwick LGW. Cheapest option available. Average driving time to city centre is 52 minutes. Flights from £518
LGW
Gatwick
Cheapest
Average driving time to city centre52 min
Flights from £518

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

June is typically the cheapest month to fly

From £428 - £1,120 per traveller.

Frequently asked questions

How much does a flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) cost?
You can find cheap one-way flights from £276 and cheap return flights from £476 YOW to LHR with Expedia. One-way flights typically cost between £574 and £1403, and return flights often range between £561 and £2532. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when YOW to LHR ticket fares go up or down.
What is the cheapest month to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The cheapest months to fly from YOW to LHR are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
Only one airline offers direct flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow). Air Canada operates 7 direct flights from YOW to LHR every week.
How do I find cheap flights from Ottawa, ON (YOW) to London (LHR)?
To find a cheap flight from Ottawa, ON (YOW) to London (LHR), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The earliest flight from Ottawa Macdonald-Cartier International Airport (YOW) to London Heathrow (LHR) typically departs around 5:00 AM local time. This service is operated by Air Canada. This is a seasonal service, active in January, February, March, April, November, and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
A direct flight from Ottawa Macdonald-Cartier Intl. (YOW) to London Heathrow (LHR) typically takes around 6 hours 30 minutes. This route covers a distance of approximately 5,348 kilometers. If you opt for a flight with one stop, the journey usually takes longer, around 10 hours 18 minutes. Flights with two or more stops will extend your travel time further, typically to about 13 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some flexibility in your travel plans.
Can you fly business or first class from Ottawa, ON (YOW) to London (LHR)?
Select the "Business class" and "First class" filters when looking for Ottawa, ON (YOW) to London (LHR) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London (LHR) from Ottawa, ON (YOW)?
If you're planning to travel to London from Macdonald-Cartier Intl. (YOW), you can fly directly into Heathrow (LHR). Some flights may connect through major hubs like Pearson Intl. (YYZ), Pierre Elliott Trudeau Intl. (YUL), or Washington Dulles Intl. (IAD) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ottawa, ON (YOW) to London (LHR)?
If you booked your Ottawa, ON (YOW) to London (LHR) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Macdonald-Cartier Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Austrian Airlines, British Airways, Brussels Airlines, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic
Return price
£475
Distance
5315 km
Average flight time
6 hours 30 mins

Book with confidence

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 £476 and range up to £663.  

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 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 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.  

Compare flights from Ottawa to London easily and book with confidence

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*Available to Expedia members.