S$874 Cheap Flights from Ottawa to London

View S$874 flight on Thu, 9 Oct, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Ottawa to London (YOW-LHR)

Prices were available within the past 7 days and start at S$874 for one-way flights and S$958 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Virgin Atlantic
Tue, 12 May - Tue, 19 May
YOW
Ottawa
LHR
London
S$958 Return, found 13 hours ago
S$958
Return
found 13 hours ago
Select Virgin Atlantic flight, departing Tue, 12 May from Ottawa to London, returning Tue, 19 May, priced at S$958 found 13 hours ago
Air Canada
Thu, 9 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
S$970 Return, found 3 days ago
S$970
Return
found 3 days ago
Select Air Canada flight, departing Thu, 9 Oct from Ottawa to London, returning Thu, 16 Oct, priced at S$970 found 3 days ago
Air Canada
Thu, 9 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
S$978 Return, found 3 days ago
S$978
Return
found 3 days ago
Select Air Canada flight, departing Thu, 9 Oct from Ottawa to London, returning Thu, 16 Oct, priced at S$978 found 3 days ago
Air Canada
Thu, 9 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
S$987 Return, found 3 days ago
S$987
Return
found 3 days ago
Select Air Canada flight, departing Thu, 9 Oct from Ottawa to London, returning Thu, 16 Oct, priced at S$987 found 3 days ago
Air Canada
Thu, 9 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
S$1,000 Return, found 3 days ago
S$1,000
Return
found 3 days ago
Select Air Canada flight, departing Thu, 9 Oct from Ottawa to London, returning Thu, 16 Oct, priced at S$1,000 found 3 days ago
Air Canada
Thu, 2 Oct - Wed, 8 Oct
YOW
Ottawa
LHR
London
S$1,006 Return, found 3 days ago
S$1,006
Return
found 3 days ago
Select Air Canada flight, departing Thu, 2 Oct from Ottawa to London, returning Wed, 8 Oct, priced at S$1,006 found 3 days ago
Air Canada
Thu, 9 Oct - Thu, 16 Oct
YOW
Ottawa
LHR
London
S$1,008 Return, found 3 days ago
S$1,008
Return
found 3 days ago
Select Air Canada flight, departing Thu, 9 Oct from Ottawa to London, returning Thu, 16 Oct, priced at S$1,008 found 3 days ago
KLM
Tue, 12 May - Tue, 19 May
YOW
Ottawa
LHR
London
S$1,031 Return, found 13 hours ago
S$1,031
Return
found 13 hours ago
Select KLM flight, departing Tue, 12 May from Ottawa to London, returning Tue, 19 May, priced at S$1,031 found 13 hours ago
Air France
Tue, 12 May - Tue, 19 May
YOW
Ottawa
LHR
London
S$1,065 Return, found 13 hours ago
S$1,065
Return
found 13 hours ago
Select Air France flight, departing Tue, 12 May from Ottawa to London, returning Tue, 19 May, priced at S$1,065 found 13 hours ago
Lufthansa
Thu, 2 Oct - Wed, 8 Oct
YOW
Ottawa
LHR
London
S$1,237 Return, found 3 days ago
S$1,237
Return
found 3 days ago
Select Lufthansa flight, departing Thu, 2 Oct from Ottawa to London, returning Wed, 8 Oct, priced at S$1,237 found 3 days ago

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

February is typically the cheapest month to fly

From S$735 - S$1,779 per traveller.

Graph displaying average flight prices per month

Ottawa to London route information
Origin airport
Macdonald-Cartier Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Air France, Austrian Airlines, KLM, LOT-Polish Airlines, Lufthansa, Swiss International Air Lines, United, Virgin Atlantic
Return price
S$957
Distance
5315 km
Average flight time
6 hours 35 mins

Perfect flights from Ottawa to London

Your Journey from Ottawa to London

Start your unforgettable journey with Expedia. Our broad selection of flights from Ottawa to London caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including Virgin Atlantic, Air France, KLM, Air Canada, Lufthansa. Our selection of flights from Macdonald-Cartier Intl. to Heathrow caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Ottawa to London Flights

Experience the joy of finding cheap flights from Macdonald-Cartier Intl. to Heathrow that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$874 and roundtrip prices from S$958*.
 

Pre-Flight Essentials

Ensure a smooth journey from Ottawa to London with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant London

Picture yourself stepping off the plane in London and immersing yourself in the unique atmosphere of London. From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Ottawa to London Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Ottawa to London.
 

Beyond the Flight – Exploring London

With Expedia, your adventure extends beyond the flight. Explore London at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Ottawa to London with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Ottawa to London with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

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 S$958. 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.

Explore a world of travel with Expedia

London Airports

London

*Available to Expedia members.