£366 Cheap Flights from London (LHR) to Ottawa (YOW)

View £366 flight on Fri, 2 Oct 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at £366 for one-way flights and £403 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Mon, 15 Jun - Mon, 14 Sept
LHR
London
YOW
Ottawa
£403 Return, found 2 hours ago
£403
Return
found 2 hours ago
Select Swiss International Air Lines flight, departing Mon, 15 Jun from London to Ottawa, returning Mon, 14 Sept, priced at £403 found 2 hours ago
Austrian Airlines
Mon, 15 Jun - Mon, 14 Sept
LHR
London
YOW
Ottawa
£405 Return, found 2 hours ago
£405
Return
found 2 hours ago
Select Austrian Airlines flight, departing Mon, 15 Jun from London to Ottawa, returning Mon, 14 Sept, priced at £405 found 2 hours ago
Austrian Airlines
Mon, 8 Jun - Mon, 15 Jun
LHR
London
YOW
Ottawa
£408 Return, found 3 hours ago
£408
Return
found 3 hours ago
Select Austrian Airlines flight, departing Mon, 8 Jun from London to Ottawa, returning Mon, 15 Jun, priced at £408 found 3 hours ago
Swiss International Air Lines
Mon, 15 Jun - Mon, 14 Sept
LHR
London
YOW
Ottawa
£409 Return, found 2 hours ago
£409
Return
found 2 hours ago
Select Swiss International Air Lines flight, departing Mon, 15 Jun from London to Ottawa, returning Mon, 14 Sept, priced at £409 found 2 hours ago
KLM
Fri, 2 Oct - Fri, 9 Oct
LHR
London
YOW
Ottawa
£410 Return, just found
£410
Return
just found
Select KLM flight, departing Fri, 2 Oct from London to Ottawa, returning Fri, 9 Oct, priced at £410 just found
Air Canada
Thu, 11 Jun - Wed, 17 Jun
LHR
London
YOW
Ottawa
£411 Return, found 2 hours ago
£411
Return
found 2 hours ago
Select Air Canada flight, departing Thu, 11 Jun from London to Ottawa, returning Wed, 17 Jun, priced at £411 found 2 hours ago
KLM
Sat, 26 Sept - Sat, 10 Oct
LHR
London
YOW
Ottawa
£412 Return, found 3 days ago
£412
Return
found 3 days ago
Select KLM flight, departing Sat, 26 Sept from London to Ottawa, returning Sat, 10 Oct, priced at £412 found 3 days ago
Air Canada
Thu, 11 Jun - Wed, 17 Jun
LHR
London
YOW
Ottawa
£414 Return, found 2 hours ago
£414
Return
found 2 hours ago
Select Air Canada flight, departing Thu, 11 Jun from London to Ottawa, returning Wed, 17 Jun, priced at £414 found 2 hours ago
Air France
Wed, 10 Jun - Thu, 18 Jun
LHR
London
YOW
Ottawa
£416 Return, found 2 hours ago
£416
Return
found 2 hours ago
Select Air France flight, departing Wed, 10 Jun from London to Ottawa, returning Thu, 18 Jun, priced at £416 found 2 hours ago
United
Thu, 17 Sept - Sun, 20 Sept
LHR
London
YOW
Ottawa
£428 Return, found 11 hours ago
£428
Return
found 11 hours ago
Select United flight, departing Thu, 17 Sept from London to Ottawa, returning Sun, 20 Sept, priced at £428 found 11 hours ago

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

October is typically the cheapest month to fly

From £400 - £640 per traveller.

Frequently asked questions

How much does a flight from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) cost?
One-way flights typically cost between $1,356 and $8,106 and return flights often range between $1,895 and $10,278. 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.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
April is typically the cheapest month to fly from London Heathrow (LHR) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), with average round-trip fares of approximately 1596 CAD. This is about 13% lower than the average price throughout the year. April often sees lower prices as the peak winter travel season has ended, and the summer rush hasn't yet begun, leading to less demand. Other cheap months to fly from London Heathrow (LHR) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) include May and June.*Averages based on flights available on Expedia in the last year.
Which airlines fly direct from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
Enter LHR to YOW and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
To find a cheap flight from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
The best airline to fly with from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) will differ from traveler to traveler. If you like to fly early, AC offers early morning flights. If price is the most important factor, AC typically offers the lowest fares. UA offers the most daily flights from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.), which is great 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
When planning your trip from London Heathrow (LHR) to Ottawa (YOW), you'll find that April and May are typically the cheapest months to fly, with average round-trip flight prices around 1596 CAD. While these months offer great value, the most popular times to travel are September and December, which means plenty of flight options. If you're looking for a balance of good prices and a wide selection of flights, consider aiming for April or May to take advantage of the lower fares.*Prices based on flights available on Expedia in the last year.
How many flights per day from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
There are approximately 79 connecting flights per day from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.). Some common connection points include (DUB), Pearson Intl. (YYZ), and Humberto Delgado (LIS).
What is the earliest flight from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
The earliest flight from London Heathrow (LHR) to Ottawa Macdonald-Cartier Intl. (YOW) typically departs around 6:00 AM local time. This service is operated by BT and AC, and it's a seasonal offering, active only in July. 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.
What day of the week has the most flights from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
You'll typically find the most flights from London Heathrow (LHR) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) on a Thursday, with around 66 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, Air Canada, and British Airways. Flight schedules are consistent throughout the week, so you'll have a good selection of flights regardless of the day you choose to fly.
What are the most popular departure times for flights from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
The most popular departure times for flights from London Heathrow (LHR) to Ottawa, ON (YOW) are between 12pm and 3pm. About 30% of passengers prefer this time window. Many major carriers, including Air Canada and United Airlines, offer flights during this window. This timing works well because it allows for a morning in London before your flight, and you'll arrive in Ottawa in the evening.
How long does it take to fly from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
Direct flights from LHR to YOW usually take about 8 hours, traveling roughly 3,323 miles. If you opt for a connecting flight, expect to add around 3 hours 50 minutes to your journey. 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
Select the "Business class" and "First class" filters when looking for LHR to YOW 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) flight with Expedia?
It's easy to earn miles on a London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) 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 Ottawa from Heathrow (LHR)?
From Heathrow (LHR), you can fly into Macdonald-Cartier Intl. (YOW) to reach Ottawa. Some flights may connect through major hubs like ZRH (ZRH), Frankfurt Intl. (FRA), DUB (DUB) before reaching Ottawa. 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) at the last minute?
Typically, booking a last minute flight from London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) flight and hotel package?
Securing a London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) 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 London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.)?
If you booked your London (LHR-Heathrow) to Ottawa, ON (YOW-Macdonald-Cartier Intl.) 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
Heathrow
Destination airport
Macdonald-Cartier Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, Austrian Airlines, Brussels Airlines, ITA Airways, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic
Return price
£403
Distance
5315 km
Average flight time
7 hours 55 mins

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 Heathrow 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 Heathrow (LHR) 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 Heathrow to Macdonald-Cartier Intl. start at just £403 and range up to £590.  

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 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 London to Ottawa flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow 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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*Available to Expedia members.