Cheap flights from Ottawa to London Heathrow Airport from £239
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/10. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 20 days in advance, depart on a Wednesday or Monday and return on a Thursday
Cheap flight deals from Ottawa to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 13 July 2025.
Round-trip from | £532 |
---|---|
One-way from | £239 |
Popular in | December |
Cheapest in | February |
Average price | £635 |
Good round-trip deal | £611 or less |
Find flight deals from Ottawa to Heathrow
Cheapest flights from Ottawa to HeathrowExplore the most affordable flight options available from Ottawa to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.
Explore the most affordable flight options available from Ottawa to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Ottawa to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 July 2025.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Sun 28/9
11:55-08:00
2 stops15h 05m
London Heathrow
Tue 7/10
09:50-21:09
2 stops16h 19m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Tue 26/8
14:48-05:55
1 stop10h 07m
London Heathrow
Tue 2/9
06:50-21:35
2 stops19h 45m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Tue 26/8
18:40-10:00
1 stop10h 20m
London Heathrow
Tue 2/9
14:05-09:00
1 stop23h 55m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Sun 7/9
11:50-12:40
2 stops19h 50m
London Heathrow
Sun 14/9
09:50-20:05
2 stops15h 15m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Wed 5/11
17:20-13:45
1 stop15h 25m
London Heathrow
Wed 19/11
11:30-15:10
1 stop32h 40m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Wed 27/8
21:00-08:35
Nonstop6h 35m
London Heathrow
Wed 3/9
12:40-15:00
Nonstop7h 20m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Thu 24/7
15:55-21:45
2 stops24h 50m
London Heathrow
Thu 28/8
06:00-23:08
2 stops22h 08m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Fri 17/10
05:55-21:40
3 stops58h 45m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Thu 17/7
14:40-10:00
1 stop14h 20m
OttawaLondon
YOW - LHR
YOWLHR
Ottawa
Mon 21/7
18:30-10:00
1 stop10h 30m
Best time to book a flight from Ottawa to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ottawa with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Ottawa to London Heathrow Airport
How far ahead should I book a flight from Ottawa to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Ottawa to Heathrow. Price data was last updated on 11 July 2025.
Booking 20 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £112). Flying from Ottawa to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from YOW to LHR?
Find hourly flight availability from Ottawa to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 July 2025.
One of the essential ways to save on airfare from Ottawa to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the afternoon could potentially save you up to 13% on airfare.
How much does it cost for a return flight from Ottawa to London Heathrow Airport?
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 13 July 2025.
Read reviews from past customers who have flown with Austrian Airlines, SWISS, andUnited Airlines from Ottawa to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Crew
Overall
Entertainment
Food
Comfort
Boarding
Reviews
Dominik,Jun 2025
VIE - VNO
Related info for your journey
Find useful and relevant information for your journey from Ottawa to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Ottawa?
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Alternative routes for Ottawa to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Ottawa to Heathrow
Discover the top airline that operate flights from Ottawa to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Ottawa to Heathrow?
When you search for this flight from Ottawa to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Ottawa to Heathrow?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Heathrow for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Ottawa to Heathrow with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Heathrow flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Ottawa to Heathrow become cheaper?
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