$465+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Nov 3 — Nov 101
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 October 4, 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 October 4, 2026.
This Trip.com deal was found by Cheapflights users on 9/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop15h 40m
Wed 11/114:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$676
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop15h 40m
Fri 11/134:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$722
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:07 pm -
2 stops28h 58m
Wed 11/184:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$750
This United Airlines deal was found by Cheapflights users on 9/30. 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 11/185:00 am -
2 stops21h 00m
Thu 11/2612:00 pm -
2 stops15h 42m
Deal found 9/30![United Airlines logo]()
$757
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 11/295:00 am -
2 stops21h 00m
Thu 12/1012:00 pm -
2 stops16h 38m
Deal found 10/1![United Airlines logo]()
$798
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 October 4, 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 October 4, 2026.
This Delta deal was found by Cheapflights users on 10/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/25:47 pm -
2 stops32h 43m
Fri 4/911:25 am -
2 stops30h 42m
Deal found 10/1![Delta logo]()
$837
This Icelandair deal was found by Cheapflights users on 9/29. 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 10/3011:13 am -
1 stop12h 02m
Wed 11/44:55 pm -
1 stop12h 50m
Deal found 9/29![Multiple Airlines logo]()
$919
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Sun 10/187:00 am -
1 stop18h 50m
Thu 10/2210:00 am -
2 stops43h 49m
Deal found 10/3![United Airlines logo]()
$1,106
This Alaska Airlines deal was found by Cheapflights users on 10/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:13 pm -
2 stops27h 02m
Fri 11/134:50 pm -
2 stops30h 23m
Deal found 10/3![Alaska Airlines logo]()
$1,198
This Icelandair deal was found by Cheapflights users on 10/2. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/97:00 am -
1 stop15h 15m
Tue 2/164:55 pm -
1 stop13h 20m
Deal found 10/2![Multiple Airlines logo]()
$959
This Icelandair deal was found by Cheapflights users on 9/29. 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 1/1010:05 am -
1 stop12h 00m
Tue 1/194:55 pm -
1 stop12h 50m
Deal found 9/29![Multiple Airlines logo]()
$989
This Mytrip deal was found by Cheapflights users on 9/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:33 pm -
2 stops29h 02m
Wed 11/184:55 pm -
3 stops26h 21m
Deal found 9/29![Multiple Airlines logo]()
$1,247
Last-minute flights from Ontario to Keflavik IntlDiscover last-minute flight deals from Ontario to Keflavik Intl. Data last updated October 4, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Keflavik Intl. Data last updated October 4, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:07 pm -
2 stops28h 58m
Wed 11/184:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$750
This Trip.com deal was found by Cheapflights users on 9/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop15h 40m
Wed 11/114:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$676
This Mytrip deal was found by Cheapflights users on 9/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop15h 40m
Fri 11/134:55 pm -
1 stop14h 56m
Deal found 9/30![Multiple Airlines logo]()
$722
This United Airlines deal was found by Cheapflights users on 9/30. 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 11/185:00 am -
2 stops21h 00m
Thu 11/2612:00 pm -
2 stops15h 42m
Deal found 9/30![United Airlines logo]()
$757
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 11/295:00 am -
2 stops21h 00m
Thu 12/1012:00 pm -
2 stops16h 38m
Deal found 10/1![United Airlines logo]()
$798
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 October 4, 2026.
Search for one-way flight options from Ontario to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Sun 11/155:00 am -
3 stops21h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![United Airlines logo]()
$465
This United Airlines deal was found by Cheapflights users on 9/29. 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 11/187:00 am -
1 stop19h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 9/30. 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 10/215:00 am -
3 stops20h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![United Airlines logo]()
$535
This United Airlines deal was found by Cheapflights users on 9/29. 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 11/174:17 pm -
2 stops33h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$539
This United Airlines deal was found by Cheapflights users on 9/29. 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 11/166:37 pm -
2 stops55h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$562
This KAYAK deal was found by Cheapflights users on 9/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:00 am -
1 stop18h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Lufthansa logo]()
$564
This FlightHub deal was found by Cheapflights users on 9/29. 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 1/307:00 am -
2 stops26h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![British Airways logo]()
$579
This Expedia deal was found by Cheapflights users on 10/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1712:51 pm -
2 stops20h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![British Airways logo]()
$649
This Icelandair deal was found by Cheapflights users on 9/29. 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 1/316:30 am -
1 stop15h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$700
This Gotogate deal was found by Cheapflights users on 10/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1911:29 am -
1 stop11h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Alaska Airlines logo]()
$733
This British Airways deal was found by Cheapflights users on 9/29. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:00 am -
2 stops26h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![British Airways logo]()
$769
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 October 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $676 (Trip.com) |
One-way from | $465 (United Airlines) |
Popular in | December |
Cheapest in | April |
Average price | $820 |
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 October 4, 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
Sun 11/15
5:00 am-10:00 am
3 stops21h 00m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$465
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Wed 11/18
5:00 am-10:00 am
3 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 10/21
7:07 am-9:30 am
2 stops19h 23m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$535
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Mon 10/19
7:07 am-9:30 am
2 stops19h 23m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$535
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Wed 10/21
7:00 am-8:50 am
1 stop18h 50m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$535
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sun 10/11
7:00 am-8:50 am
1 stop18h 50m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$535
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Tue 11/17
4:17 pm-10:00 am
2 stops33h 43m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$539
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Mon 11/16
6:37 pm-10:00 am
2 stops55h 23m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$562
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Thu 12/17
12:51 pm-5:05 pm
2 stops20h 14m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$649
Quickest round-trip
OntarioReykjavik
ONT Ontario - KEF Reykjavik Keflavik Intl
ONTKEF
Ontario
Sun 1/31
7:00 am-6:05 am
2 stops15h 05m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$700
Showing 1-10 of 17 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 October.
| 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.
Reviews of airlines servicing Keflavik Intl
Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated October 4, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines from Ontario to Reykjavik Keflavik Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Entertainment
7.0
Overall
7.9
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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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Other flights to Keflavik Intl
Explore flights to Keflavik Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Ontario and Keflavik Intl flights
Browse other Ontario and Keflavik Intl flight options. Last updated on October 4, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Ontario to Keflavik Intl
Discover the top airline that operate flights from Ontario to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$645 | Average$808 | FlexibilityNo cancel fee | On-time75% |