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Keflavik Intl

$530+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This Trip.com deal was found by Cheapflights users on 1/26. 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.
Mon 4/66:20 am
ONT
-
KEF
1 stop16h 40m
Multiple Airlines
Sun 4/124:50 pm
KEF
-
ONT
1 stop14h 06m
Multiple Airlines
Deal found 1/26$740
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am
ONT
-
KEF
2 stops18h 45m
Multiple Airlines
Wed 8/2610:00 am
KEF
-
ONT
2 stops33h 20m
Multiple Airlines
Deal found 1/27$772
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 8/1812:13 pm
ONT
-
KEF
1 stop13h 47m
Alaska Airlines
Mon 8/3112:45 pm
KEF
-
ONT
1 stop16h 54m
Alaska Airlines
Deal found 1/26$793
This Alaska Airlines deal was found by Cheapflights users on 1/26. 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.
Fri 8/214:00 pm
ONT
-
KEF
1 stop34h 00m
Alaska Airlines
Wed 8/2612:45 pm
KEF
-
ONT
1 stop16h 54m
Alaska Airlines
Deal found 1/26$824
This FlightHub deal was found by Cheapflights users on 1/27. 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 9/46:30 pm
ONT
-
KEF
2 stops55h 15m
Air Canada
Sat 9/1910:00 am
KEF
-
ONT
2 stops33h 20m
Air Canada
Deal found 1/27$848
This Expedia deal was found by Cheapflights users on 1/26. 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 7/76:53 pm
ONT
-
KEF
2 stops30h 02m
Air Canada
Thu 7/1610:00 am
KEF
-
ONT
2 stops41h 17m
Air Canada
Deal found 1/26$859
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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.
Wed 8/196:58 pm
ONT
-
KEF
1 stop31h 02m
Alaska Airlines
Wed 8/2612:45 pm
KEF
-
ONT
1 stop12h 28m
Alaska Airlines
Deal found 1/27$860
This United Airlines deal was found by Cheapflights users on 1/27. 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 9/46:30 pm
ONT
-
KEF
2 stops55h 15m
United Airlines
Sat 9/1912:00 pm
KEF
-
ONT
1 stop17h 26m
United Airlines
Deal found 1/27$863
This United Airlines deal was found by Cheapflights users on 1/26. 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 7/67:00 am
ONT
-
KEF
1 stop18h 30m
United Airlines
Wed 7/1512:00 pm
KEF
-
ONT
1 stop17h 26m
United Airlines
Deal found 1/26$877
This Delta deal was found by Cheapflights users on 1/26. 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.
Sun 7/510:59 pm
ONT
-
KEF
2 stops27h 31m
Delta
Wed 7/1511:25 am
KEF
-
ONT
2 stops30h 39m
Delta
Deal found 1/26$881
This United Airlines deal was found by Cheapflights users on 1/28. 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 5/1410:37 am
ONT
-
KEF
2 stops14h 53m
United Airlines
Fri 5/2912:00 pm
KEF
-
ONT
2 stops15h 17m
United Airlines
Deal found 1/28$882
This United Airlines deal was found by Cheapflights users on 1/26. 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 7/57:00 am
ONT
-
KEF
2 stops18h 45m
United Airlines
Tue 7/1412:00 pm
KEF
-
ONT
1 stop17h 26m
United Airlines
Deal found 1/26$885

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 January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$740
(Trip.com)

One-way from

$530
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$840
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. 5% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 28, 2026.
Use the filters below to find and compare flights from Ontario to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Ontario

Fly to

Keflavik Intl

Route

Depart

Return

Price

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 7/7

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Wed 7/15

12:00 pm-10:26 pm

1 stop17h 26m

$877

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 7/7

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Tue 7/14

12:00 pm-10:26 pm

1 stop17h 26m

$877

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 7/5

10:59 pm-9:30 am

2 stops27h 31m

Reykjavik Keflavik Intl

Fri 7/17

11:25 am-11:04 am

2 stops30h 39m

$881

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/6

7:00 am-7:00 am

2 stops17h 00m

Reykjavik Keflavik Intl

Tue 7/14

12:00 pm-10:26 pm

1 stop17h 26m

$881

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/6

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Wed 7/15

11:00 am-10:26 pm

2 stops18h 26m

$881

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 5/14

10:37 am-8:30 am

2 stops14h 53m

Reykjavik Keflavik Intl

Fri 5/29

12:00 pm-8:17 pm

2 stops15h 17m

$882

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 7/5

7:00 am-8:45 am

2 stops18h 45m

Reykjavik Keflavik Intl

Tue 7/14

12:00 pm-10:26 pm

1 stop17h 26m

$885

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 6/1

12:01 pm-9:00 am

1 stop13h 59m

Reykjavik Keflavik Intl

Fri 6/12

12:45 pm-11:56 pm

1 stop18h 11m

$886

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/27

7:00 am-8:30 am

1 stop18h 30m

$530

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 6/8

4:03 pm-9:00 am

1 stop33h 57m

$552

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 18 results
1
2

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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Reykjavik Keflavik Intl Airport

What is the cheapest month to book a flight from Ontario to Reykjavik Keflavik Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Ontario to Reykjavik Keflavik Intl Airport (average of $399). Flying from Ontario to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $885). 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.

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 18h 30m. 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.

  • What is the cheapest month to book a flight from Ontario to Reykjavik Keflavik Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Reykjavik Keflavik Intl Airport (average of $399). Flying from Ontario to Reykjavik Keflavik Intl Airport in December is currently the most expensive (average of $885). 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.

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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