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Keflavik Intl

$325+ Cheap flights from Ontario (ONT) to Keflavik Intl (KEF)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap flight deals from Ontario to Keflavik Intl

Cheapest flights from Ontario to Keflavik Intl
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 July 25, 2026.

This Alaska Airlines deal was found by Cheapflights users on 7/21. 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.
Sun 10/116:02 am
ONT
-
KEF
1 stop20h 23m
Alaska Airlines
Tue 10/207:45 pm
KEF
-
ONT
1 stop21h 32m
Alaska Airlines
Deal found 7/21$381
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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.
Sun 9/2712:12 pm
ONT
-
KEF
1 stop14h 13m
Alaska Airlines
Tue 10/67:45 pm
KEF
-
ONT
1 stop21h 32m
Alaska Airlines
Deal found 7/21$452
This Flightnetwork deal was found by Cheapflights users on 7/24. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:02 am
ONT
-
KEF
1 stop19h 58m
Alaska Airlines
Wed 9/910:40 am
KEF
-
ONT
1 stop15h 23m
Alaska Airlines
Deal found 7/24$550
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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.
Sun 11/157:10 pm
ONT
-
KEF
1 stop27h 05m
Alaska Airlines
Thu 11/195:00 pm
KEF
-
ONT
1 stop13h 54m
Alaska Airlines
Deal found 7/20$559
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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.
Thu 9/37:59 pm
ONT
-
KEF
1 stop30h 01m
Alaska Airlines
Thu 9/1010:40 am
KEF
-
ONT
1 stop15h 23m
Alaska Airlines
Deal found 7/23$568
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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.
Thu 9/2412:12 pm
ONT
-
KEF
1 stop14h 13m
Alaska Airlines
Sun 10/47:45 pm
KEF
-
ONT
1 stop21h 32m
Alaska Airlines
Deal found 7/20$610
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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.
Thu 8/2712:00 pm
ONT
-
KEF
1 stop14h 00m
Alaska Airlines
Fri 8/2812:45 pm
KEF
-
ONT
1 stop17h 39m
Alaska Airlines
Deal found 7/23$624
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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.
Sun 8/237:59 pm
ONT
-
KEF
1 stop30h 01m
Alaska Airlines
Fri 8/2812:45 pm
KEF
-
ONT
1 stop17h 39m
Alaska Airlines
Deal found 7/23$633
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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.
Sun 12/204:00 pm
ONT
-
KEF
1 stop30h 15m
Alaska Airlines
Wed 12/305:00 pm
KEF
-
ONT
1 stop14h 56m
Alaska Airlines
Deal found 7/21$647
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/2412:00 pm
ONT
-
KEF
1 stop14h 00m
Alaska Airlines
Tue 9/810:40 am
KEF
-
ONT
1 stop34h 36m
Alaska Airlines
Deal found 7/21$653

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$381
(Alaska Airlines)

One-way from

$325
(Priceline)

Popular in

November

Cheapest in

April

Average price

$877
Provider with most accurate pricing for Ontario-Reykjavik Keflavik Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Reykjavik Keflavik Intl flights.
Search Deals
From Ontario to Reykjavik Keflavik Intl
Search Deals
One-way flight from Ontario to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($129 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 2,558,603 searches. Data last updated July 25, 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

Price

Cheapest round-trip

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 10/11

6:02 am-9:25 am

1 stop20h 23m

Reykjavik Keflavik Intl

Tue 10/20

7:45 pm-10:17 am

1 stop21h 32m

$381

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 12/24

4:01 pm-6:15 am

1 stop30h 14m

Reykjavik Keflavik Intl

Mon 12/28

5:00 pm-11:56 pm

1 stop14h 56m

$647

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 8/20

12:25 pm-6:00 am

1 stop10h 35m

Reykjavik Keflavik Intl

Mon 8/24

4:50 pm-10:10 pm

1 stop12h 20m

$775
Quickest round-trip

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 8/20

12:25 pm-6:00 am

1 stop10h 35m

Reykjavik Keflavik Intl

Tue 8/25

4:50 pm-10:00 pm

1 stop12h 10m

$776

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 10/15

2:13 pm-9:25 am

1 stop12h 12m

Reykjavik Keflavik Intl

Thu 10/22

4:50 pm-10:15 pm

1 stop12h 25m

$788

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/22

3:14 pm-9:25 am

1 stop11h 11m

Reykjavik Keflavik Intl

Tue 9/29

4:50 pm-10:00 pm

1 stop12h 10m

$802

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 9/23

6:08 am-8:50 am

2 stops19h 42m

Reykjavik Keflavik Intl

Wed 9/30

9:15 am-8:58 pm

2 stops42h 43m

$809

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/22

7:00 am-8:50 am

1 stop18h 50m

Reykjavik Keflavik Intl

Thu 10/1

12:00 pm-10:49 pm

1 stop17h 49m

$816

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 8/31

6:08 am-7:55 am

2 stops18h 47m

Reykjavik Keflavik Intl

Thu 9/10

10:00 am-10:59 pm

2 stops43h 59m

$986

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 12/15

6:53 pm-10:00 am

2 stops31h 07m

Reykjavik Keflavik Intl

Thu 12/31

12:00 pm-9:09 pm

2 stops17h 09m

$1,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 23 resultsSorted by cheapest first
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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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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.

  • What airport do you fly from for flights from Ontario to Reykjavik Keflavik Intl?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to Reykjavik Keflavik Intl. 0 airlines have flights from Ontario to Reykjavik Keflavik Intl on a regular basis. Booking flights from Ontario to Reykjavik Keflavik Intl should not be difficult; the airport handles an average of 0 outbound flights to Reykjavik Keflavik Intl per day.

  • How long is the flight from Ontario to Reykjavik Keflavik Intl Airport?

    Departing from Ontario to Reykjavik Keflavik Intl Airport will take you 20h 23m. There are 4271 mi between Ontario and Reykjavik Keflavik Intl Airport.

  • Can I find deals for flights from Ontario to Keflavik Intl that include hotel bookings?

    Yes. In addition to deals on Ontario to Keflavik Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Keflavik Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Keflavik Intl.

  • Can I find deals for business class flights from Ontario to Keflavik Intl?

    Yes. Cheapflights offers flight deals from Ontario to Keflavik Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Reykjavik Keflavik Intl Airport?

Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locations
Keflavik
Hveragerdi

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