$461+ Cheap flights from Ontario (ONT) to Keflavik Intl (KEF)
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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Oct 11 — Oct 181
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Keflavik Intl 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.Cheap flight deals from Ontario to Keflavik Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to Keflavik IntlExplore the most affordable flight options available from Ontario to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
Explore the most affordable flight options available from Ontario to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/246:15 am -
1 stop16h 45m
Sat 10/314:55 pm -
1 stop13h 56m
Deal found 9/9![Multiple Airlines logo]()
$578
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 11/176:00 am -
1 stop16h 15m
Mon 11/235:00 pm -
1 stop14h 31m
Deal found 9/9![Multiple Airlines logo]()
$654
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/102:13 pm -
1 stop12h 12m
Thu 10/154:50 pm -
1 stop13h 52m
Deal found 9/9![Multiple Airlines logo]()
$666
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 11/36:25 am -
1 stop15h 40m
Tue 11/104:55 pm -
1 stop14h 56m
Deal found 9/8![Multiple Airlines logo]()
$679
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/36:15 am -
2 stops20h 10m
Thu 10/87:45 pm -
1 stop24h 58m
Deal found 9/9![Multiple Airlines logo]()
$714
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/92:13 pm -
1 stop12h 12m
Sun 10/184:50 pm -
1 stop13h 52m
Deal found 9/9![Multiple Airlines logo]()
$730
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/232:13 pm -
1 stop12h 12m
Fri 10/305:00 pm -
1 stop13h 42m
Deal found 9/8![Multiple Airlines logo]()
$781
This Icelandair deal was found by Cheapflights users on 9/7. 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.
Tue 10/2010:25 am -
1 stop12h 35m
Thu 2/255:00 pm -
1 stop13h 39m
Deal found 9/7![Multiple Airlines logo]()
$789
This United Airlines deal was found by Cheapflights users on 9/11. 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 11/157:00 am -
1 stop19h 00m
Mon 11/2312:00 pm -
1 stop14h 47m
Deal found 9/11![United Airlines logo]()
$802
Best flights from Ontario to Keflavik IntlDiscover carefully curated flight deals from Ontario to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
Discover carefully curated flight deals from Ontario to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2026.
This United Airlines deal was found by Cheapflights users on 9/9. 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 11/157:00 am -
1 stop19h 00m
Mon 11/2312:00 pm -
1 stop14h 47m
Deal found 9/9![United Airlines logo]()
$802
This oojo deal was found by Cheapflights users on 9/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:02 am -
1 stop20h 23m
Sat 10/247:45 pm -
1 stop21h 32m
Deal found 9/6![Icelandair logo]()
$864
This Icelandair deal was found by Cheapflights users on 9/9. 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.
Wed 11/1110:05 am -
1 stop12h 00m
Fri 11/205:00 pm -
1 stop14h 31m
Deal found 9/9![Multiple Airlines logo]()
$1,000
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/167:00 am -
1 stop18h 50m
Thu 10/2912:00 pm -
1 stop13h 47m
Deal found 9/7![United Airlines logo]()
$915
This oojo deal was found by Cheapflights users on 9/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/56:00 am -
1 stop16h 15m
Fri 3/125:00 pm -
1 stop26h 09m
Deal found 9/6![Icelandair logo]()
$930
This Icelandair deal was found by Cheapflights users on 9/7. 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.
Sun 11/18:05 am -
1 stop14h 00m
Thu 11/54:55 pm -
1 stop13h 45m
Deal found 9/7![Multiple Airlines logo]()
$1,039
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/138:03 am -
2 stops16h 52m
Tue 10/2010:00 am -
2 stops19h 49m
Deal found 9/9![United Airlines logo]()
$985
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 12/165:45 am -
2 stops20h 15m
Sat 12/2612:00 pm -
2 stops17h 00m
Deal found 9/7![United Airlines logo]()
$1,041
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/187:00 am -
1 stop18h 50m
Thu 10/2210:00 am -
2 stops43h 49m
Deal found 9/7![United Airlines logo]()
$1,106
Last-minute flights from Ontario to Keflavik IntlDiscover last-minute flight deals from Ontario to Keflavik Intl. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Keflavik Intl. Data last updated September 11, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/36:15 am -
2 stops20h 10m
Thu 10/87:45 pm -
1 stop24h 58m
Deal found 9/9![Multiple Airlines logo]()
$714
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/92:13 pm -
1 stop12h 12m
Sun 10/184:50 pm -
1 stop13h 52m
Deal found 9/9![Multiple Airlines logo]()
$730
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/102:13 pm -
1 stop12h 12m
Thu 10/154:50 pm -
1 stop13h 52m
Deal found 9/9![Multiple Airlines logo]()
$666
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:02 am -
1 stop20h 23m
Sun 10/187:45 pm -
1 stop21h 32m
Deal found 9/11![Icelandair logo]()
$855
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/196:32 pm -
2 stops30h 23m
Thu 11/512:00 pm -
1 stop14h 47m
Deal found 9/11![United Airlines logo]()
$812
This oojo deal was found by Cheapflights users on 9/7. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1911:13 am -
1 stop15h 12m
Mon 10/265:00 pm -
1 stop13h 42m
Deal found 9/7![Icelandair logo]()
$859
This Icelandair deal was found by Cheapflights users on 9/7. 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.
Tue 10/2010:25 am -
1 stop12h 35m
Thu 2/255:00 pm -
1 stop13h 39m
Deal found 9/7![Multiple Airlines logo]()
$789
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/232:13 pm -
1 stop12h 12m
Fri 10/305:00 pm -
1 stop13h 42m
Deal found 9/8![Multiple Airlines logo]()
$781
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/246:15 am -
1 stop16h 45m
Sat 10/314:55 pm -
1 stop13h 56m
Deal found 9/9![Multiple Airlines logo]()
$578
One-way flights from Ontario to Keflavik IntlSearch for one-way flight options from Ontario to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
Search for one-way flight options from Ontario to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.
This KLM deal was found by Cheapflights users on 9/7. 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.
Tue 10/207:07 am -
2 stops19h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![KLM logo]()
$461
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/205:00 am -
3 stops19h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 9/11. 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 12/67:00 am -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![United Airlines logo]()
$533
This Air France deal was found by Cheapflights users on 9/11. 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.
Wed 9/307:05 am -
2 stops19h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/11![Air France logo]()
$535
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 9/308:03 am -
2 stops17h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$543
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sat 9/191:18 pm -
2 stops36h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![United Airlines logo]()
$556
This Icelandair deal was found by Cheapflights users on 9/7. 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.
Tue 10/2010:25 am -
1 stop12h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$696
This Icelandair deal was found by Cheapflights users on 9/7. 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.
Mon 12/288:50 am -
1 stop13h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$700
Find flight deals from Ontario to Keflavik Intl
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Keflavik Intl (KEF). 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 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $578 (Kiwi.com) |
One-way from | $461 (KLM) |
Popular in | August |
Cheapest in | April |
Average price | $892 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Keflavik Intl 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 11, 2026.
Use the filters below to find and compare flights from Ontario to Reykjavik Keflavik Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Tue 10/20
7:07 am-9:30 am
2 stops19h 23m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$461
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sun 12/6
5:00 am-10:00 am
2 stops21h 00m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$533
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Wed 9/30
7:00 am-8:50 am
1 stop18h 50m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$581
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sat 9/19
5:00 am-8:30 am
3 stops20h 30m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$595
Quickest round-trip
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Tue 10/20
10:25 am-6:00 am
1 stop12h 35m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$696
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Mon 12/28
8:50 am-6:05 am
1 stop13h 15m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$700
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sun 11/15
7:00 am-10:00 am
1 stop19h 00m
Reykjavik Keflavik Intl
Mon 11/23
12:00 pm-6:47 pm
1 stop14h 47m
$802
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Mon 12/28
4:00 pm-10:00 am
2 stops58h 00m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$849
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sun 10/18
6:02 am-9:25 am
1 stop20h 23m
Reykjavik Keflavik Intl
Sat 10/24
7:45 pm-10:17 am
1 stop21h 32m
$864
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Fri 10/16
7:00 am-8:50 am
1 stop18h 50m
Reykjavik Keflavik Intl
Thu 10/29
12:00 pm-6:47 pm
1 stop13h 47m
$915
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Ontario to Keflavik Intl
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 Ontario to Keflavik Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Reykjavik Keflavik Intl Airport 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 Ontario-Reykjavik Keflavik Intl Airport 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 Ontario to Keflavik Intl
Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Ontario with our price prediction graph.
ONT-KEF
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.
Related info for your journey
Find useful and relevant information for your journey from Ontario to Keflavik Intl. 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 Reykjavik Keflavik Intl Airport?
Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locationsKeflavik
Hveragerdi
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