$330+ Cheap flights from London (LON) to Ottawa (YOW)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Find cheap flights from London to Ottawa with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 54 days in advance, depart on a Sunday or Tuesday and return on a Friday
Cheap flight deals from London to Ottawa
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Cheapest flights from London to OttawaExplore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This KLM deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:50 pm -
1 stop11h 30m
Fri 10/306:25 pm -
2 stops13h 40m
Deal found 9/17![KLM logo]()
$551
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:30 am -
Nonstop7h 55m
Wed 10/79:00 pm -
Nonstop6h 35m
Deal found 9/17![Lufthansa logo]()
$552
This Lufthansa deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Wed 10/149:00 pm -
Nonstop6h 35m
Deal found 9/16![Lufthansa logo]()
$554
This Air Canada deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:40 pm -
1 stop11h 10m
Wed 10/149:00 pm -
Nonstop6h 35m
Deal found 9/15![Air Canada logo]()
$555
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Fri 10/162:50 pm -
1 stop10h 40m
Deal found 9/17![Lufthansa logo]()
$556
This KLM deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:50 pm -
1 stop11h 30m
Tue 9/295:25 pm -
1 stop9h 30m
Deal found 9/17![Multiple Airlines logo]()
$557
This Air Canada deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:05 pm -
1 stop13h 05m
Wed 10/143:10 pm -
1 stop13h 50m
Deal found 9/17![Air Canada logo]()
$560
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:50 am -
2 stops31h 21m
Sun 10/116:05 am -
1 stop20h 10m
Deal found 9/15![United Airlines logo]()
$565
This Air France deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/258:55 am -
1 stop11h 05m
Wed 1/65:10 pm -
2 stops15h 40m
Deal found 9/16![Multiple Airlines logo]()
$566
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:40 am -
1 stop19h 45m
Wed 10/78:55 pm -
1 stop30h 00m
Deal found 9/13![Air Transat logo]()
$587
This Booking.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2512:40 pm -
1 stop24h 25m
Wed 9/308:55 pm -
1 stop30h 00m
Deal found 9/17![Air Transat logo]()
$594
This Air Transat deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:40 am -
Nonstop8h 00m
Thu 11/55:40 pm -
1 stop11h 05m
Deal found 9/16![Air Transat logo]()
$598
Best flights from London to OttawaDiscover carefully curated flight deals from London to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from London to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Wed 10/149:00 pm -
Nonstop6h 35m
Deal found 9/17![Lufthansa logo]()
$552
This KLM deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:50 pm -
1 stop11h 30m
Wed 10/286:25 pm -
2 stops15h 25m
Deal found 9/16![KLM logo]()
$584
This Air Transat deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:40 am -
Nonstop8h 00m
Thu 11/55:40 pm -
1 stop11h 05m
Deal found 9/16![Air Transat logo]()
$598
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:50 pm -
1 stop11h 30m
Wed 10/215:10 pm -
1 stop9h 45m
Deal found 9/15![Multiple Airlines logo]()
$647
This Virgin Atlantic deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:55 am -
1 stop11h 05m
Fri 11/65:10 pm -
1 stop12h 20m
Deal found 9/15![Virgin Atlantic logo]()
$717
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:30 am -
2 stops16h 25m
Mon 10/193:10 pm -
1 stop11h 05m
Deal found 9/14![United Airlines logo]()
$733
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Fri 10/162:50 pm -
1 stop10h 40m
Deal found 9/17![Lufthansa logo]()
$556
This KLM deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:50 pm -
1 stop11h 30m
Mon 10/195:10 pm -
1 stop15h 35m
Deal found 9/14![Multiple Airlines logo]()
$647
This KLM deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:30 am -
2 stops13h 30m
Fri 1/85:10 pm -
2 stops13h 55m
Deal found 9/13![KLM logo]()
$703
This Air Transat deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:40 am -
1 stop11h 18m
Thu 11/195:40 pm -
1 stop11h 05m
Deal found 9/14![Air Transat logo]()
$768
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:00 am -
1 stop10h 05m
Fri 11/65:10 pm -
1 stop10h 50m
Deal found 9/15![KLM logo]()
$718
This Air Transat deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:40 am -
1 stop15h 35m
Fri 11/205:40 pm -
1 stop11h 05m
Deal found 9/14![Air Transat logo]()
$768
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:45 pm -
2 stops14h 35m
Fri 10/306:25 pm -
2 stops13h 40m
Deal found 9/15![KLM logo]()
$751
This Air Transat deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1411:40 am -
1 stop11h 18m
Wed 11/255:40 pm -
1 stop11h 05m
Deal found 9/14![Air Transat logo]()
$768
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:40 am -
1 stop15h 35m
Mon 1/111:45 pm -
1 stop15h 00m
Deal found 9/13![Air Transat logo]()
$810
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1311:40 am -
1 stop15h 35m
Mon 1/115:40 pm -
1 stop11h 05m
Deal found 9/13![Air Transat logo]()
$867
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:40 am -
1 stop11h 18m
Sat 1/95:40 pm -
1 stop11h 05m
Deal found 9/13![Air Transat logo]()
$882
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1411:40 am -
1 stop15h 35m
Wed 1/65:40 pm -
1 stop11h 05m
Deal found 9/13![Air Transat logo]()
$909
This Air Transat deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:40 am -
1 stop14h 35m
Wed 10/2810:20 am -
1 stop19h 25m
Deal found 9/16![Air Transat logo]()
$927
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:40 am -
1 stop11h 18m
Thu 1/710:20 am -
1 stop18h 25m
Deal found 9/13![Air Transat logo]()
$955
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1611:40 am -
1 stop11h 18m
Sun 1/105:40 pm -
1 stop11h 05m
Deal found 9/13![Air Transat logo]()
$955
Last-minute flights from London to OttawaDiscover last-minute flight deals from London to Ottawa. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from London to Ottawa. Data last updated September 17, 2026 and is based on user searches.
This KLM deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:50 pm -
1 stop11h 30m
Tue 9/295:25 pm -
1 stop9h 30m
Deal found 9/17![Multiple Airlines logo]()
$557
This Booking.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2512:40 pm -
1 stop24h 25m
Wed 9/308:55 pm -
1 stop30h 00m
Deal found 9/17![Air Transat logo]()
$594
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:30 am -
Nonstop7h 55m
Wed 10/79:00 pm -
Nonstop6h 35m
Deal found 9/17![Lufthansa logo]()
$552
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:50 am -
2 stops14h 48m
Tue 10/66:01 pm -
2 stops17h 24m
Deal found 9/17![United Airlines logo]()
$571
This Air Transat deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:40 am -
1 stop19h 45m
Wed 10/78:55 pm -
1 stop30h 00m
Deal found 9/13![Air Transat logo]()
$587
This Air Transat deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:40 am -
Nonstop8h 00m
Thu 11/55:40 pm -
1 stop11h 05m
Deal found 9/16![Air Transat logo]()
$598
This Air Canada deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:40 pm -
1 stop11h 10m
Wed 10/149:00 pm -
Nonstop6h 35m
Deal found 9/15![Air Canada logo]()
$555
This Lufthansa deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Wed 10/149:00 pm -
Nonstop6h 35m
Deal found 9/16![Lufthansa logo]()
$554
This Lufthansa deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:10 pm -
Nonstop7h 55m
Fri 10/162:50 pm -
1 stop10h 40m
Deal found 9/17![Lufthansa logo]()
$556
This Air Canada deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/72:05 pm -
1 stop13h 05m
Wed 10/143:10 pm -
1 stop13h 50m
Deal found 9/17![Air Canada logo]()
$560
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:50 am -
2 stops31h 21m
Sun 10/116:05 am -
1 stop20h 10m
Deal found 9/15![United Airlines logo]()
$565
This KLM deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:50 pm -
1 stop11h 30m
Fri 10/306:25 pm -
2 stops13h 40m
Deal found 9/17![KLM logo]()
$551
One-way flights from London to OttawaSearch for one-way flight options from London to Ottawa. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from London to Ottawa. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Justfly.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2512:40 pm -
1 stop16h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Multiple Airlines logo]()
$330
This SmartFares deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/129:40 am -
1 stop19h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Air Transat logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/309:55 am -
3 stops56h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$437
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:10 pm -
2 stops39h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Multiple Airlines logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/22:50 pm -
1 stop38h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![WestJet logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/26:00 am -
2 stops23h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/211:40 am -
1 stop11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$479
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:10 pm -
3 stops39h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![WestJet logo]()
$489
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1610:00 am -
1 stop10h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![KLM logo]()
$498
This Virgin Atlantic deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:55 am -
1 stop11h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Virgin Atlantic logo]()
$500
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/74:10 pm -
1 stop13h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![KLM logo]()
$521
This KLM deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:30 am -
2 stops13h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![KLM logo]()
$529
Find flight deals from London to Ottawa
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Ottawa (YOW). 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 September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $551 (KLM) |
One-way from | $330 (Justfly.com) |
Popular in | December |
Cheapest in | June |
Average price | $658 |
Good round-trip deal | $790 or less |
Good one-way deal | $291 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from London to Ottawa 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 September 17, 2026.
Use the filters below to find and compare flights from London to Ottawa that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LondonOttawa
LGW London Gatwick - YOW Ottawa
LGWYOW
London Gatwick
Fri 9/25
12:40 pm-12:25 am
1 stop16h 45m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$330
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Tue 2/2
6:00 am-12:44 am
2 stops23h 44m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$478
LondonOttawa
LGW London Gatwick - YOW Ottawa
LGWYOW
London Gatwick
Tue 2/2
11:40 am-5:58 pm
1 stop11h 18m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$479
LondonOttawa
LGW London Gatwick - YOW Ottawa
LGWYOW
London Gatwick
Wed 12/16
10:00 am-3:00 pm
1 stop10h 00m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$498
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Wed 11/11
8:55 am-3:00 pm
1 stop11h 05m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$500
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Mon 11/30
4:10 pm-12:44 am
1 stop13h 34m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$521
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Sat 11/7
4:10 pm-12:44 am
1 stop13h 34m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$521
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Wed 11/25
6:30 am-3:00 pm
2 stops13h 30m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$529
LondonOttawa
LHR London Heathrow - YOW Ottawa
LHRYOW
London Heathrow
Fri 11/6
6:30 am-3:00 pm
2 stops13h 30m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$531
LondonOttawa
LGW London Gatwick - YOW Ottawa
LGWYOW
London Gatwick
Sun 10/25
11:40 am-5:58 pm
1 stop34h 18m
Ottawa
Wed 12/31
12:00 am-6:00 am
Nonstop0h 00m
$545
Showing 1-10 of 36 resultsSorted by cheapest first
Compare providers for flights from London to Ottawa
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Ottawa in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on London-Ottawa flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Ottawa flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Ottawa flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London-Ottawa flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from London to Ottawa
Have a flexible travel schedule? Discover the best time to fly to Ottawa from London with our price prediction graph.
LON-YOW
LHR-YOW
LGW-YOW
Estimated round-trip 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 London to Ottawa
LON-YOW
LHR-YOW
LGW-YOW
What is the cheapest month to book a flight from London to Ottawa?
Currently, June is the cheapest month in which you can book a flight from London to Ottawa (average of $593). Flying from London to Ottawa in December is currently the most expensive (average of $922). 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 LON to YOW?
Find hourly flight availability from London to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Ottawa as you normally would.
How much does it cost to fly round-trip from London to Ottawa?
Airfare is typical for this route at the moment.
London to Ottawa flights typically cost between $513 and $748 in October.The cheapest round-trip price found within the last 5 days was $551 on KLM (Oct 12-Oct 30).
How often are flights from London to Ottawa delayed?
About 11% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 202 minutes.
What is the most punctual flight time for London to Ottawa flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Thursday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Ottawa flights?
Over the last year, Air Transat have had the lowest number of delays on this route, with just 10% of flights being delayed.
How far ahead should I book a flight from London to Ottawa?
To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 74 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing Ottawa
Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated September 17, 2026.
Read through reviews of airlines operating flights from London to Ottawa, such as Air Transat,Air Canada, andLufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Crew
8.5
Food
6.8
Boarding
8.0
Entertainment
7.1
Overall
7.7
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Comfort
7.3
Crew
8.5
Food
6.8
Boarding
8.0
Entertainment
7.1
Overall
7.7
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Comfort
7.3
Crew
8.5
Food
6.8
Boarding
8.0
Entertainment
7.1
Overall
7.7
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Comfort
7.3
Crew
8.5
Food
6.8
Boarding
8.0
Entertainment
7.1
Overall
7.7
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Related info for your journey
Find useful and relevant information for your journey from London to Ottawa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Ottawa?
Book flights to Ottawa if you plan to visit one of these locationsGatineau
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