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Keflavik Intl

$700+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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Cheap 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 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$710
(United Airlines)

One-way from

$700
(Icelandair)

Popular in

December

Cheapest in

September

Average price

$840
Provider with most accurate pricing for Ontario-Reykjavik Keflavik Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Reykjavik Keflavik Intl flights.
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From Ontario to Reykjavik Keflavik Intl
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One-way flight from Ontario to Reykjavik Keflavik Intl
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Highest demand for flights based on searches. 5% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 8, 2026.

This United Airlines deal was found by Cheapflights users on 1/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:00 amONT - KEF
1 stop18h 30mUnited Airlines
Mon 5/1812:00 pmKEF - ONT
1 stop17h 26mUnited Airlines
Deal found 1/6$710
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/217:15 amONT - KEF
1 stop14h 50mMultiple Airlines
Tue 1/274:55 pmKEF - ONT
1 stop30h 12mMultiple Airlines
Deal found 1/7$765
This Alaska Airlines deal was found by Cheapflights users on 1/6. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/171:47 pmONT - KEF
1 stop12h 13mAlaska Airlines
Thu 8/2712:45 pmKEF - ONT
1 stop16h 54mAlaska Airlines
Deal found 1/6$769
This United Airlines deal was found by Cheapflights users on 1/7. 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 5/1311:05 amONT - KEF
2 stops14h 25mUnited Airlines
Fri 5/2212:00 pmKEF - ONT
1 stop17h 26mUnited Airlines
Deal found 1/7$776
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/226:00 amONT - KEF
1 stop16h 15mMultiple Airlines
Thu 2/55:00 pmKEF - ONT
1 stop14h 56mMultiple Airlines
Deal found 1/7$784
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:47 pmONT - KEF
1 stop12h 13mAlaska Airlines
Wed 7/2212:45 pmKEF - ONT
1 stop18h 11mAlaska Airlines
Deal found 1/8$792
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/105:33 pmONT - KEF
1 stop32h 27mAlaska Airlines
Wed 7/2212:45 pmKEF - ONT
1 stop18h 11mAlaska Airlines
Deal found 1/8$800
This United Airlines deal was found by Cheapflights users on 1/7. 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 10/67:00 amONT - KEF
2 stops17h 55mUnited Airlines
Thu 10/1510:00 amKEF - ONT
2 stops43h 26mUnited Airlines
Deal found 1/7$813
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:47 pmONT - KEF
1 stop12h 13mAlaska Airlines
Wed 7/2212:45 pmKEF - ONT
1 stop18h 11mAlaska Airlines
Deal found 1/8$815

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 8, 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 5/12

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Mon 5/18

12:00 pm-9:50 pm

2 stops16h 50m

$714

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 5/13

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Mon 5/18

12:00 pm-9:50 pm

2 stops16h 50m

$714

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 5/13

11:05 am-8:30 am

2 stops14h 25m

Reykjavik Keflavik Intl

Fri 5/22

12:00 pm-10:26 pm

1 stop17h 26m

$776

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 5/31

6:00 am-9:00 am

1 stop20h 00m

Reykjavik Keflavik Intl

Sat 6/6

12:45 pm-11:07 am

1 stop29h 22m

$823

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/6

1:47 pm-9:00 am

1 stop12h 13m

Reykjavik Keflavik Intl

Mon 7/13

12:45 pm-11:56 pm

1 stop18h 11m

$885

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/6

1:47 pm-9:00 am

1 stop12h 13m

Reykjavik Keflavik Intl

Fri 7/10

12:45 pm-11:56 pm

1 stop18h 11m

$885

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 3/3

6:30 am-6:05 am

1 stop15h 35m

$700

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 2/6

9:45 am-6:05 am

1 stop12h 20m

$700

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 2/28

6:55 am-6:05 am

1 stop15h 10m

$700

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 6/18

7:48 pm-9:00 am

1 stop30h 12m

$729

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

Showing 1-10 of 16 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $384). 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. This flight may include one or multiple stops.

  • 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 $384). 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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