Cheap flights from Ottawa to London Heathrow Airport from £246
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
8 Dec — 15 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in September or January, booked 54 days in advance, depart on a Wednesday or Tuesday and return on a Friday
Cheap flight deals from Ottawa to Heathrow
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from Ottawa to Heathrow
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 8 November 2026.
Wed 2/1217:40 -
2 stops17h 55m
Wed 9/1208:55 -
2 stops15h 57m
Deal found 4/11£550
Mon 7/1209:10 -
2 stops18h 55m
Mon 14/1208:50 -
2 stops15h 40m
Deal found 7/11£578
Wed 2/1210:05 -
2 stops17h 00m
Wed 9/1209:50 -
2 stops17h 00m
Deal found 7/11£580
Tue 1/1217:40 -
2 stops17h 55m
Tue 8/1208:55 -
2 stops15h 57m
Deal found 3/11£587
Tue 17/1114:00 -
2 stops27h 55m
Thu 19/1119:30 -
2 stops33h 25m
Deal found 3/11£588
Thu 3/1209:10 -
2 stops17h 55m
Sat 6/207:50 -
2 stops16h 40m
Deal found 4/11£588
Sat 5/1218:50 -
Nonstop6h 40m
Sat 12/1211:10 -
Nonstop7h 55m
Deal found 7/11£593
Fri 4/1209:10 -
2 stops17h 55m
Thu 10/1208:50 -
2 stops15h 40m
Deal found 5/11£594
Fri 27/1112:10 -
2 stops15h 55m
Tue 8/1209:50 -
2 stops14h 40m
Deal found 3/11£594
Best flights from Ottawa to Heathrow
Discover carefully curated flight deals from Ottawa to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 November 2026.
Sun 29/1106:00 -
2 stops23h 50m
Mon 14/1210:25 -
1 stop32h 44m
Deal found 4/11£672
Sat 13/317:10 -
2 stops12h 35m
Sat 20/316:10 -
1 stop11h 30m
Deal found 7/11£801
Sun 7/305:30 -
2 stops45h 35m
Mon 22/316:10 -
1 stop11h 30m
Deal found 7/11£928
Sun 28/306:20 -
1 stop19h 25m
Mon 12/409:30 -
2 stops19h 12m
Deal found 7/11£690
Sat 27/314:48 -
1 stop12h 32m
Mon 12/412:15 -
2 stops14h 41m
Deal found 7/11£690
Wed 18/1114:00 -
2 stops14h 10m
Wed 16/1216:20 -
2 stops25h 51m
Deal found 5/11£702
Mon 14/1206:15 -
2 stops19h 25m
Tue 22/1216:20 -
2 stops28h 23m
Deal found 6/11£761
Fri 1/106:15 -
2 stops19h 25m
Fri 15/109:10 -
1 stop33h 01m
Deal found 7/11£791
Tue 22/1206:00 -
2 stops20h 55m
Mon 11/106:35 -
2 stops17h 52m
Deal found 8/11£924
Direct flights from Ottawa to Heathrow
Explore direct flight options from Ottawa to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 8 November 2026.
Wed 21/421:00 -
Nonstop6h 35m
Wed 5/514:10 -
Nonstop7h 55m
Deal found 6/11£560
Wed 14/421:00 -
Nonstop6h 35m
Wed 21/412:05 -
Nonstop7h 55m
Deal found 8/11£564
Wed 14/421:00 -
Nonstop6h 35m
Wed 21/412:05 -
Nonstop7h 55m
Deal found 7/11£567
Wed 7/421:00 -
Nonstop6h 35m
Wed 21/412:05 -
Nonstop7h 55m
Deal found 3/11£570
Mon 26/418:55 -
Nonstop6h 35m
Wed 5/514:10 -
Nonstop7h 55m
Deal found 5/11£570
Thu 15/418:55 -
Nonstop6h 35m
Mon 19/409:30 -
Nonstop7h 55m
Deal found 7/11£575
Wed 14/421:00 -
Nonstop6h 35m
Thu 29/409:30 -
Nonstop7h 55m
Deal found 3/11£578
Thu 1/418:55 -
Nonstop6h 35m
Wed 7/412:05 -
Nonstop7h 55m
Deal found 5/11£579
Mon 26/418:55 -
Nonstop6h 35m
Thu 6/509:30 -
Nonstop7h 55m
Deal found 5/11£579
Thu 8/418:55 -
Nonstop6h 35m
Thu 15/409:30 -
Nonstop7h 55m
Deal found 5/11£583
Sat 10/421:00 -
Nonstop6h 35m
Sat 17/412:05 -
Nonstop7h 55m
Deal found 6/11£585
Last-minute flights from Ottawa to Heathrow
Discover last-minute flight deals from Ottawa to Heathrow. Data last updated 8 November 2026 and is based on user searches.
Tue 17/1114:00 -
2 stops27h 55m
Thu 19/1119:30 -
2 stops33h 25m
Deal found 3/11£588
Fri 27/1112:10 -
2 stops15h 55m
Tue 8/1209:50 -
2 stops14h 40m
Deal found 3/11£594
Tue 1/1217:40 -
2 stops17h 55m
Tue 8/1208:55 -
2 stops15h 57m
Deal found 3/11£587
Wed 2/1217:40 -
2 stops17h 55m
Wed 9/1208:55 -
2 stops15h 57m
Deal found 4/11£550
Wed 2/1210:05 -
2 stops17h 00m
Wed 9/1209:50 -
2 stops17h 00m
Deal found 7/11£580
Thu 3/1209:10 -
2 stops17h 55m
Sat 6/207:50 -
2 stops16h 40m
Deal found 4/11£588
Fri 4/1209:10 -
2 stops17h 55m
Thu 10/1208:50 -
2 stops15h 40m
Deal found 5/11£594
Sat 5/1218:50 -
Nonstop6h 40m
Sat 12/1211:10 -
Nonstop7h 55m
Deal found 7/11£593
Mon 7/1209:10 -
2 stops18h 55m
Mon 14/1208:50 -
2 stops15h 40m
Deal found 7/11£578
One-way flights from Ottawa to Heathrow
Search for one-way flight options from Ottawa to Heathrow. Find affordable one-way fares based on user searches. Data last updated 8 November 2026.
Wed 20/106:10 -
1 stop25h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/11£246
Wed 17/206:10 -
1 stop25h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/11£250
Thu 28/118:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 6/11£252
Mon 7/1218:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/11£255
Sun 17/118:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/11£256
Sat 28/1118:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£257
Thu 3/1206:10 -
1 stop25h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/11£258
Fri 4/1218:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/11£260
Sat 23/105:30 -
3 stops26h 20m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/11£261
Sun 6/1218:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/11£261
Sun 29/1118:55 -
1 stop36h 55m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/11£263
Find 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 8 November 2026.
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 7,457,451 searches. Data last updated 8 November 2026.
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
Cheapest return flight
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Sun 17/1
18:55-12:50
1 stop36h 55m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£256
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Sat 30/1
05:30-12:50
2 stops26h 20m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£267
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Wed 27/1
07:00-12:50
2 stops24h 50m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£268
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Sat 5/12
18:55-12:50
1 stop36h 55m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£276
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Wed 17/2
07:00-12:50
3 stops24h 50m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£290
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Fri 4/12
05:30-12:50
3 stops26h 20m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£296
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Sun 2/5
18:25-10:20
2 stops34h 55m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£313
Fastest return journey
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Wed 3/3
14:00-09:05
2 stops14h 05m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£315
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Fri 26/3
10:15-06:15
1 stop16h 00m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£381
OttawaLondon
YOW Ottawa - LHR London Heathrow
YOWLHR
Ottawa
Thu 6/5
09:00-06:15
1 stop16h 15m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£383
Flights are sorted by cheapest return flights first.
Deals found on 3/11
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
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.
YOW-LHR
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ottawa to London Heathrow Airport
Prices
Delays
How far ahead should I book a flight from Ottawa to London Heathrow Airport?
Booking 53 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, September is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £526). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £847). 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 8 November 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to London Heathrow Airport as you normally would.
How much does it cost for a return flight from Ottawa to London Heathrow Airport?
Airfare is typical for this route at the moment.
Ottawa to London Heathrow Airport flights typically cost between £499 and £667 in April.The cheapest return price found within the last 5 days was £548 on Multiple Airlines (14 Apr–21 Apr).
How often are flights from Ottawa to London delayed?
About 32% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 141 minutes.
What is the most punctual flight time for Ottawa to London flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Ottawa to London flights?
Over the past year, Air Canada have had the lowest number of delays on this route, with just 32% of flights being delayed.
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 8 November 2026.
Read reviews from past customers who have flown with Air Canada
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.
Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
Our flight from Kelowna was 5 hours delayed. We missed our connection. We were able to get to a hotel by 3:00 a.m. but the breakfast cost us $40. The hotel was good. We were rescheduled for the flight the next night when it was canceled. There were no hotel vouchers available which didn't matter because there were no hotel rooms available. We decided to just drive which was not easy doing a one-way rental to the United States. Worst possible trip I've ever had
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.
What airport do you fly from for flights from Ottawa to London Heathrow?
If you book a flight to London Heathrow from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There is 1 flight from Ottawa to London Heathrow per day from 1 airline.
How long is the flight from Ottawa to London Heathrow Airport?
For as low as £690, United Airlines can have you in London Heathrow Airport from Ottawa in 19h 25m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi.
What is the cheapest airline to fly from Ottawa to London Heathrow Airport round-trip?
According to our current data, Air Canada (£487), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 21% less than the average price by searching for this airline.
What are the most reliable airlines from Ottawa to London Heathrow Airport?
No one likes to see their flight delayed. When booking a flight from Ottawa to London Heathrow Airport consider choosing Croatia Airlines (100%), TAP AIR PORTUGAL (89%) or United Airlines (75%) as they are the most reliable in getting you off to your destination on time.
What are the cheapest flights from Ottawa to London Heathrow Airport?
Looking for the cheapest flight from Ottawa to London Heathrow Airport? While on average our users pay £826, our data indicates the cheapest price to be £567. The most popular route (Ottawa - London Heathrow), is priced around £556.
Can I find deals for business class flights from Ottawa to Heathrow?
Yes. Cheapflights offers flight deals from Ottawa to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?
Currently, September is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of £526). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of £847). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 8 November 2026.
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 7,457,451 searches. Data last updated 8 November 2026.
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?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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