£369 Cheap Flights from Ottawa (YOW) to London (LHR)

View £369 flight on Thu, 23 Jul 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days and start at £369 for one-way flights and £486 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, 5 Jun - Mon, 15 Jun
YOW
Ottawa
LHR
London
£486 Return, found 3 hours ago
£486
Return
found 3 hours ago
Select Air Canada flight, departing Fri, 5 Jun from Ottawa to London, returning Mon, 15 Jun, priced at £486 found 3 hours ago
Air Canada
Sun, 24 May - Mon, 1 Jun
YOW
Ottawa
LHR
London
£486 Return, found 1 day ago
£486
Return
found 1 day ago
Select Air Canada flight, departing Sun, 24 May from Ottawa to London, returning Mon, 1 Jun, priced at £486 found 1 day ago
Air Canada
Fri, 5 Jun - Mon, 15 Jun
YOW
Ottawa
LHR
London
£488 Return, found 3 hours ago
£488
Return
found 3 hours ago
Select Air Canada flight, departing Fri, 5 Jun from Ottawa to London, returning Mon, 15 Jun, priced at £488 found 3 hours ago
Air Canada
Fri, 5 Jun - Mon, 15 Jun
YOW
Ottawa
LHR
London
£489 Return, found 3 hours ago
£489
Return
found 3 hours ago
Select Air Canada flight, departing Fri, 5 Jun from Ottawa to London, returning Mon, 15 Jun, priced at £489 found 3 hours ago
Air Canada
Mon, 1 Jun - Fri, 12 Jun
YOW
Ottawa
LHR
London
£491 Return, found 6 hours ago
£491
Return
found 6 hours ago
Select Air Canada flight, departing Mon, 1 Jun from Ottawa to London, returning Fri, 12 Jun, priced at £491 found 6 hours ago
Air Canada
Mon, 21 Sept - Wed, 30 Sept
YOW
Ottawa
LHR
London
£491 Return, found 1 day ago
£491
Return
found 1 day ago
Select Air Canada flight, departing Mon, 21 Sept from Ottawa to London, returning Wed, 30 Sept, priced at £491 found 1 day ago
Virgin Atlantic
Wed, 17 Jun - Sun, 21 Jun
YOW
Ottawa
LHR
London
£511 Return, found 3 hours ago
£511
Return
found 3 hours ago
Select Virgin Atlantic flight, departing Wed, 17 Jun from Ottawa to London, returning Sun, 21 Jun, priced at £511 found 3 hours ago
Air France
Mon, 18 May - Sun, 21 Jun
YOW
Ottawa
LHR
London
£513 Return, found 6 hours ago
£513
Return
found 6 hours ago
Select Air France flight, departing Mon, 18 May from Ottawa to London, returning Sun, 21 Jun, priced at £513 found 6 hours ago
Aer Lingus
Tue, 15 Sept - Thu, 24 Sept
YOW
Ottawa
LHR
London
£756 Return, found 5 hours ago
£756
Return
found 5 hours ago
Select Aer Lingus flight, departing Tue, 15 Sept from Ottawa to London, returning Thu, 24 Sept, priced at £756 found 5 hours ago
TAP Portugal
Thu, 24 Dec - Wed, 6 Jan
YOW
Ottawa
LHR
London
£783 Return, found 2 days ago
£783
Return
found 2 days ago
Select TAP Portugal flight, departing Thu, 24 Dec from Ottawa to London, returning Wed, 6 Jan, priced at £783 found 2 days 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. Average driving time to city centre is 52 minutes. Flights from £633
LGW
Gatwick
Average driving time to city centre52 min
Flights from £633
Select flight to London City LCY. Closest option available. Average driving time to city centre is 21 minutes. Flights from £771
LCY
London City
Closest
Average driving time to city centre21 min
Flights from £771

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

May is typically the cheapest month to fly

From £453 - £1,144 per traveller.

Frequently asked questions

How much does a flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £948 and £2,478 and return flights often range between £1,011 and £4,169. 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 Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
Which airlines fly direct from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
Enter YOW to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow), 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 airline to fly with from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The best airline to fly with from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) will differ from traveller to traveller. If you like to fly early, AC offers early morning flights. If price is the most important factor, AC typically offers the lowest fares. AC offers the most daily flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
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.
How many flights per day from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
There are approximately 45 connecting flights per day from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow). Some common connection points include Pearson Intl. (YYZ), Pierre Elliott Trudeau Intl. (YUL), and Liberty Intl. (EWR).
What is the earliest flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The earliest flight from Ottawa Macdonald-Cartier Intl. (YOW) to London Heathrow (LHR) typically departs at approximately 5:00 AM local time. This flight 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 maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
If you're flying from Ottawa Macdonald-Cartier Intl. (YOW) to London Heathrow (LHR), you'll typically find the most flights on a Thursday, with around 56 flights available. This gives you plenty of options to choose from. Major airlines on this route include Air Canada, United Airlines, and Porter Airlines. Looking at the week, Thursday offers notably more flight options compared to other days, making it a good day to consider for your travel.
What are the most popular departure times for flights from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Ottawa Macdonald-Cartier Intl. (YOW) to London Heathrow (LHR) are in the afternoon, from 3pm to 6pm. About 27% of passengers prefer this time. Many major carriers, including United Airlines, Air Canada and Air France, offer flights during this window. This timing works well because it allows you to have a productive morning before heading to the airport, and you'll arrive at your destination ready to settle in.
How long does it take to fly from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
A nonstop flight from YOW to LHR typically takes around 6 hours 30 minutes, covering approximately 3,323 miles. Connecting flights on this route usually add 3 hours 50 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for YOW to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
A direct, return business class ticket from Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) typically costs between £5,465 - £11,315. A non-stop, one-way business class flight is usually around £8,173 - £8,203. You may also be able to find a cheaper business class journey between Ottawa, ON (YOW-Macdonald-Cartier Intl. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.
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 from Macdonald-Cartier Intl. (YOW)?
When traveling from Macdonald-Cartier Intl. (YOW) to London, you can fly into Gatwick (LGW), Heathrow (LHR) and London Intl. (YXU). Some flights may connect through major hubs like Pearson Intl. (YYZ), Pierre Elliott Trudeau Intl. (YUL), Liberty Intl. (EWR) 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-Macdonald-Cartier Intl.) to London (LHR-Heathrow)?
If you booked your Ottawa, ON (YOW-Macdonald-Cartier Intl.) to London (LHR-Heathrow) 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, Brussels Airlines, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic
Return price
£485
Distance
5315 km
Average flight time
6 hours 35 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 £486 and range up to £783.  

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 June, 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

Explore a world of travel with Expedia

*Available to Expedia members.