$313+ Cheap flights from London (LON) to Ottawa (YOW)
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Sep 4 — Sep 111
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 August 5, 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 August 5, 2026.
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/129:40 am -
1 stop19h 45m
Sat 9/267:00 am -
1 stop22h 45m
Deal found 8/1![Air Transat logo]()
$580
This United Airlines deal was found by Cheapflights users on 8/3. 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 stops17h 05m
Tue 10/137:30 pm -
2 stops14h 10m
Deal found 8/3![United Airlines logo]()
$581
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/99:40 am -
1 stop15h 20m
Sun 9/207:40 pm -
Nonstop7h 15m
Deal found 8/1![Air Transat logo]()
$583
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:40 am -
Nonstop8h 00m
Tue 9/157:40 pm -
Nonstop7h 15m
Deal found 7/31![Air Transat logo]()
$584
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/105:55 pm -
2 stops30h 04m
Thu 9/175:57 pm -
2 stops17h 28m
Deal found 8/1![United Airlines logo]()
$587
This KLM deal was found by Cheapflights users on 8/3. 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
Sun 12/275:10 pm -
1 stop9h 45m
Deal found 8/3![Multiple Airlines logo]()
$588
This Gotogate deal was found by Cheapflights users on 8/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:40 am -
Nonstop8h 00m
Sun 9/208:55 pm -
1 stop30h 00m
Deal found 8/2![Multiple Airlines logo]()
$593
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/139:40 am -
Nonstop8h 00m
Wed 9/238:55 pm -
1 stop30h 00m
Deal found 8/1![Air Transat logo]()
$602
This Air Transat deal was found by Cheapflights users on 8/2. 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.
Tue 8/189:40 am -
Nonstop8h 00m
Sun 9/207:40 pm -
Nonstop7h 15m
Deal found 8/2![Air Transat logo]()
$603
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/1412:15 pm -
2 stops15h 20m
Mon 9/213:10 pm -
2 stops14h 30m
Deal found 7/31![United Airlines logo]()
$603
This United Airlines deal was found by Cheapflights users on 8/4. 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 9/1812:15 pm -
1 stop16h 39m
Fri 9/2510:37 am -
1 stop15h 08m
Deal found 8/4![United Airlines logo]()
$604
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/148:00 am -
1 stop14h 16m
Thu 9/242:52 pm -
1 stop11h 03m
Deal found 8/1![United Airlines logo]()
$605
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 August 5, 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 August 5, 2026.
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/129:40 am -
1 stop19h 45m
Sat 9/267:00 am -
1 stop22h 45m
Deal found 8/1![Air Transat logo]()
$580
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/147:45 am -
1 stop13h 53m
Mon 9/213:10 pm -
2 stops14h 30m
Deal found 7/31![United Airlines logo]()
$603
This Virgin Atlantic deal was found by Cheapflights users on 8/5. 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.
Sun 12/2710:00 am -
1 stop10h 00m
Wed 1/135:10 pm -
1 stop17h 35m
Deal found 8/5![Virgin Atlantic logo]()
$667
This Delta deal was found by Cheapflights users on 8/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/171:05 pm -
1 stop16h 37m
Tue 1/55:40 am -
2 stops43h 40m
Deal found 8/3![Delta logo]()
$797
This Icelandair deal was found by Cheapflights users on 7/31. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:40 pm -
2 stops37h 40m
Thu 10/84:00 pm -
2 stops17h 40m
Deal found 7/31![Multiple Airlines logo]()
$970
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/139:40 am -
Nonstop8h 00m
Wed 9/238:55 pm -
1 stop30h 00m
Deal found 8/1![Air Transat logo]()
$602
This United Airlines deal was found by Cheapflights users on 8/3. 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 9/1711:05 am -
1 stop15h 30m
Thu 9/245:20 pm -
1 stop13h 35m
Deal found 8/3![United Airlines logo]()
$606
This Virgin Atlantic deal was found by Cheapflights users on 8/5. 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.
Sun 12/276:20 am -
1 stop13h 40m
Wed 1/135:10 pm -
1 stop20h 10m
Deal found 8/5![Virgin Atlantic logo]()
$668
This United Airlines deal was found by Cheapflights users on 7/31. 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 8/287:45 am -
2 stops21h 09m
Fri 9/45:57 pm -
1 stop11h 28m
Deal found 7/31![United Airlines logo]()
$760
This Air Transat deal was found by Cheapflights users on 7/31. 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 11/2811:40 am -
1 stop15h 28m
Fri 4/235:40 pm -
1 stop12h 05m
Deal found 7/31![Air Transat logo]()
$817
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Sun 8/309:30 am -
2 stops19h 24m
Sun 9/63:10 pm -
1 stop12h 10m
Deal found 8/2![United Airlines logo]()
$764
This Air Transat deal was found by Cheapflights users on 7/31. 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 11/2911:40 am -
1 stop15h 28m
Fri 4/235:40 pm -
1 stop12h 05m
Deal found 7/31![Air Transat logo]()
$817
This United Airlines deal was found by Cheapflights users on 8/2. 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 10/128:00 am -
1 stop14h 16m
Fri 10/3012:10 pm -
2 stops14h 10m
Deal found 8/2![United Airlines logo]()
$771
This Air Transat deal was found by Cheapflights users on 7/31. 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 12/411:40 am -
1 stop15h 28m
Sun 4/185:40 pm -
1 stop12h 05m
Deal found 7/31![Air Transat logo]()
$817
This Icelandair deal was found by Cheapflights users on 8/4. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/183:40 pm -
2 stops37h 40m
Fri 9/254:00 pm -
2 stops17h 40m
Deal found 8/4![Multiple Airlines logo]()
$1,098
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Tue 9/19:30 am -
2 stops19h 24m
Sat 10/312:00 pm -
2 stops16h 25m
Deal found 7/31![United Airlines logo]()
$790
This Air Transat deal was found by Cheapflights users on 7/31. 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 12/411:40 am -
1 stop11h 18m
Mon 4/195:40 pm -
1 stop12h 05m
Deal found 7/31![Air Transat logo]()
$873
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Tue 12/156:00 pm -
2 stops26h 07m
Tue 1/54:36 pm -
1 stop32h 19m
Deal found 8/1![United Airlines logo]()
$823
This Air Transat deal was found by Cheapflights users on 7/31. 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 11/3011:40 am -
1 stop11h 18m
Mon 4/195:40 pm -
1 stop12h 05m
Deal found 7/31![Air Transat logo]()
$873
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/47:25 am -
2 stops16h 30m
Mon 9/76:00 am -
3 stops19h 45m
Deal found 8/1![United Airlines logo]()
$824
This Air Transat deal was found by Cheapflights users on 8/3. 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 28m
Sat 1/25:40 pm -
1 stop11h 05m
Deal found 8/3![Air Transat logo]()
$1,041
This Air Transat deal was found by Cheapflights users on 8/3. 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.
Tue 12/1511:40 am -
1 stop15h 28m
Wed 12/301:00 pm -
1 stop15h 45m
Deal found 8/3![Air Transat logo]()
$1,051
Last-minute flights from London to OttawaDiscover last-minute flight deals from London to Ottawa. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from London to Ottawa. Data last updated August 5, 2026 and is based on user searches.
This Air Transat deal was found by Cheapflights users on 8/2. 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.
Tue 8/189:40 am -
Nonstop8h 00m
Sun 9/207:40 pm -
Nonstop7h 15m
Deal found 8/2![Air Transat logo]()
$603
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/99:40 am -
1 stop15h 20m
Sun 9/207:40 pm -
Nonstop7h 15m
Deal found 8/1![Air Transat logo]()
$583
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/105:55 pm -
2 stops30h 04m
Thu 9/175:57 pm -
2 stops17h 28m
Deal found 8/1![United Airlines logo]()
$587
This FlightHub deal was found by Cheapflights users on 7/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:40 am -
Nonstop8h 00m
Tue 9/157:40 pm -
Nonstop7h 15m
Deal found 7/31![Air Transat logo]()
$584
This Gotogate deal was found by Cheapflights users on 8/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/119:40 am -
Nonstop8h 00m
Sun 9/208:55 pm -
1 stop30h 00m
Deal found 8/2![Multiple Airlines logo]()
$593
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/129:40 am -
1 stop19h 45m
Sat 9/267:00 am -
1 stop22h 45m
Deal found 8/1![Air Transat logo]()
$580
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/139:40 am -
Nonstop8h 00m
Wed 9/238:55 pm -
1 stop30h 00m
Deal found 8/1![Air Transat logo]()
$602
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/1412:15 pm -
2 stops15h 20m
Mon 9/213:10 pm -
2 stops14h 30m
Deal found 7/31![United Airlines logo]()
$603
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/148:00 am -
1 stop14h 16m
Thu 9/242:52 pm -
1 stop11h 03m
Deal found 8/1![United Airlines logo]()
$605
This Air Transat deal was found by Cheapflights users on 8/1. 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 9/149:40 am -
1 stop15h 20m
Wed 9/238:55 pm -
1 stop30h 00m
Deal found 8/1![Air Transat logo]()
$610
This United Airlines deal was found by Cheapflights users on 8/3. 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 9/1711:05 am -
1 stop15h 30m
Thu 9/245:20 pm -
1 stop13h 35m
Deal found 8/3![United Airlines logo]()
$606
This United Airlines deal was found by Cheapflights users on 8/4. 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 9/1812:15 pm -
1 stop16h 39m
Fri 9/2510:37 am -
1 stop15h 08m
Deal found 8/4![United Airlines logo]()
$604
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 August 5, 2026.
Search for one-way flight options from London to Ottawa. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This SmartFares deal was found by Cheapflights users on 7/31. 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.
Fri 9/119:40 am -
Nonstop8h 00m
Deal found 7/31![Air Transat logo]()
$313
This SmartFares deal was found by Cheapflights users on 8/2. 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.
Sun 9/139:40 am -
Nonstop8h 00m
Deal found 8/2![Air Transat logo]()
$315
This SmartFares deal was found by Cheapflights users on 8/4. 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.
Fri 9/49:40 am -
Nonstop8h 00m
Deal found 8/4![Air Transat logo]()
$317
This Expedia deal was found by Cheapflights users on 8/1. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:40 pm -
1 stop31h 15m
Deal found 8/1![Air Transat logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 9/289:40 am -
1 stop15h 20m
Deal found 8/1![Air Transat logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Sat 9/1212:40 pm -
1 stop16h 45m
Deal found 8/2![Air Transat logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Fri 9/410:00 am -
2 stops37h 15m
Deal found 8/4![Multiple Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 8/4. 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.
Fri 9/48:00 pm -
2 stops27h 15m
Deal found 8/4![Multiple Airlines logo]()
$334
This FlightHub deal was found by Cheapflights users on 8/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:40 am -
1 stop27h 25m
Deal found 8/3![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Wed 10/1410:00 pm -
3 stops31h 20m
Deal found 8/5![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Wed 9/308:50 pm -
3 stops32h 30m
Deal found 8/1![Multiple Airlines logo]()
$360
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Fri 9/113:00 pm -
3 stops32h 15m
Deal found 7/31![Multiple Airlines logo]()
$392
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 August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $580 (Air Transat) |
One-way from | $313 (SmartFares) |
Popular in | December |
Cheapest in | June |
Average price | $748 |
Good round-trip deal | $636 or less |
Good one-way deal | $1,339 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 2,558,603 searches. Data last updated August 5, 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 - YOW
LGWYOW
London Gatwick
Sat 9/12
9:40 am-12:25 am
1 stop19h 45m
Ottawa
Sat 9/26
7:00 am-10:45 am
1 stop22h 45m
$580
LondonOttawa
LGW - YOW
LGWYOW
London Gatwick
Sun 9/13
9:40 am-12:40 pm
Nonstop8h 00m
Ottawa
Wed 9/23
8:55 pm-7:55 am
1 stop30h 00m
$602
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Mon 9/14
7:45 am-4:38 pm
1 stop13h 53m
Ottawa
Mon 9/21
3:10 pm-10:40 am
2 stops14h 30m
$603
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Thu 9/17
11:05 am-9:35 pm
1 stop15h 30m
Ottawa
Thu 9/24
5:20 pm-11:55 am
1 stop13h 35m
$606
LondonOttawa
LGW - YOW
LGWYOW
London Gatwick
Sun 12/27
10:00 am-3:00 pm
1 stop10h 00m
Ottawa
Wed 1/13
5:10 pm-3:45 pm
1 stop17h 35m
$667
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Sun 12/27
6:20 am-3:00 pm
1 stop13h 40m
Ottawa
Wed 1/13
5:10 pm-6:20 pm
1 stop20h 10m
$668
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Fri 8/28
7:45 am-11:54 pm
2 stops21h 09m
Ottawa
Fri 9/4
5:57 pm-10:25 am
1 stop11h 28m
$760
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Sun 8/30
9:30 am-11:54 pm
2 stops19h 24m
Ottawa
Sun 9/6
3:10 pm-8:20 am
1 stop12h 10m
$764
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Mon 10/12
8:00 am-5:16 pm
1 stop14h 16m
Ottawa
Fri 10/30
12:10 pm-6:20 am
2 stops14h 10m
$771
LondonOttawa
LHR - YOW
LHRYOW
London Heathrow
Tue 9/1
9:30 am-11:54 pm
2 stops19h 24m
Ottawa
Sat 10/31
2:00 pm-10:25 am
2 stops16h 25m
$790
Showing 1-10 of 41 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 August.
| 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
LGW-YOW
LHR-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
LGW-YOW
LHR-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 $936). 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 August 5, 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 below average for this route at the moment.
London to Ottawa flights typically cost between $685 and $852 in September.The cheapest round-trip price found within the last 5 days was $580 on Air Transat (Sep 12-Sep 26).
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 Tuesday 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 Canada have had the lowest number of delays on this route, with just 11% 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 75 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 August 5, 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.
Food
6.8
Entertainment
7.1
Comfort
7.3
Overall
7.8
Crew
8.5
Boarding
8.0
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Food
6.8
Entertainment
7.1
Comfort
7.3
Overall
7.8
Crew
8.5
Boarding
8.0
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Food
6.8
Entertainment
7.1
Comfort
7.3
Overall
7.8
Crew
8.5
Boarding
8.0
Reviews
1 / 20
10.0
ExcellentLiam,Jun 2025
GLA - YYZ
Food
6.8
Entertainment
7.1
Comfort
7.3
Overall
7.8
Crew
8.5
Boarding
8.0
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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London and Ottawa flights
Browse other London and Ottawa flight options. Last updated on August 5, 2026.
Other flights from London
Browse through other flights departing from London. Flights are based on user searches made on Cheapflights and were last updated on August 5, 2026.
Other flights to Ottawa
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Popular flight searches
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Top airline flying from London to Ottawa
Discover the top airline that operate flights from London to Ottawa. 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 2,558,603 searches. Data last updated August 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$728 | Average$866 | FlexibilityNo cancel fee | On-time67% |