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Keflavik Intl

$494+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$655
(Kiwi.com)

One-way from

$494
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$842
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. 6% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. 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 10/318:02 amONT - KEF
1 stop15h 13mMultiple Airlines
Fri 11/75:00 pmKEF - ONT
1 stop12h 58mMultiple Airlines
Deal found 9/16$678
This Ovago deal was found by Cheapflights users on 9/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/318:15 amONT - KEF
2 stops43h 25mBritish Airways
Fri 11/710:00 amKEF - ONT
2 stops40h 21mBritish Airways
Deal found 9/16$784
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/237:00 amONT - KEF
2 stops17h 00mUnited Airlines
Tue 9/309:50 amKEF - ONT
2 stops42h 34mUnited Airlines
Deal found 9/16$823
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Tue 9/235:10 amONT - KEF
3 stops20h 00mMultiple Airlines
Tue 9/309:50 amKEF - ONT
2 stops19h 40mMultiple Airlines
Deal found 9/16$852
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/21:53 pmONT - KEF
2 stops35h 22mUnited Airlines
Mon 10/69:50 amKEF - ONT
2 stops42h 34mUnited Airlines
Deal found 9/16$892
This Icelandair deal was found by Cheapflights users on 9/17. 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 11/1211:15 amONT - KEF
1 stop10h 50mMultiple Airlines
Mon 11/174:55 pmKEF - ONT
1 stop13h 10mMultiple Airlines
Deal found 9/17$936
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/37:02 amONT - KEF
2 stops18h 13mUnited Airlines
Mon 10/69:50 amKEF - ONT
2 stops42h 34mUnited Airlines
Deal found 9/16$937
This Air France deal was found by Cheapflights users on 9/16. 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 9/1711:55 amONT - KEF
2 stops14h 35mMultiple Airlines
Wed 9/248:45 amKEF - ONT
2 stops17h 30mMultiple Airlines
Deal found 9/16$973
This Icelandair deal was found by Cheapflights users on 9/16. 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.
Sat 11/11:30 pmONT - KEF
1 stop33h 35mMultiple Airlines
Thu 11/205:10 pmKEF - ONT
1 stop30h 05mMultiple Airlines
Deal found 9/16$1,020
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/217:00 amONT - KEF
1 stop18h 30mUnited Airlines
Tue 9/309:50 amKEF - ONT
2 stops43h 40mUnited Airlines
Deal found 9/16$1,078

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 September 17, 2025.
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

Wed 2/4

7:00 am-6:05 am

1 stop15h 05m

Reykjavik Keflavik Intl

Tue 2/10

4:55 pm-10:39 pm

1 stop13h 44m

$655

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 10/31

8:02 am-6:15 am

1 stop15h 13m

Reykjavik Keflavik Intl

Fri 11/7

5:00 pm-9:58 pm

1 stop12h 58m

$678

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 2/3

6:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Mon 2/9

5:00 pm-10:37 pm

1 stop13h 37m

$702

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 2/6

6:00 am-6:05 am

1 stop16h 05m

Reykjavik Keflavik Intl

Sun 2/8

4:55 pm-11:59 pm

1 stop15h 04m

$704

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 2/5

3:00 pm-5:15 pm

2 stops18h 15m

Reykjavik Keflavik Intl

Thu 2/12

11:45 am-9:31 am

2 stops29h 46m

$869

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 2/3

5:03 pm-10:45 am

2 stops33h 42m

Reykjavik Keflavik Intl

Sun 2/8

11:50 am-9:33 am

2 stops29h 43m

$869

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 2/5

3:00 pm-5:15 pm

2 stops18h 15m

Reykjavik Keflavik Intl

Tue 2/10

11:50 am-5:53 pm

2 stops38h 03m

$869

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 2/6

5:03 pm-10:40 am

2 stops33h 37m

Reykjavik Keflavik Intl

Thu 2/12

11:45 am-9:40 pm

2 stops41h 55m

$869

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 10/2

1:53 pm-8:15 am

2 stops35h 22m

Reykjavik Keflavik Intl

Mon 10/6

9:50 am-9:24 pm

2 stops42h 34m

$892

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 2/25

11:55 pm-5:15 pm

2 stops33h 20m

Reykjavik Keflavik Intl

Wed 3/4

11:50 am-11:43 pm

2 stops19h 53m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 21 results
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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, November is the cheapest month in which you can book a flight from Ontario to Reykjavik Keflavik Intl Airport (average of $328). Flying from Ontario to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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.

  • 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, November is the cheapest month in which you can book a flight from Ontario to Reykjavik Keflavik Intl Airport (average of $328). Flying from Ontario to Reykjavik Keflavik Intl Airport in June is currently the most expensive (average of $656). 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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