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Keflavik Intl

$455+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 11, 2025.

Round-trip from

$462
(Trip.com)

One-way from

$455
(Air France)

Popular in

December

Cheapest in

September

Average price

$834
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. 4% potential increase in price ($39 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 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 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/10. 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.
Tue 11/116:53 amONT - KEF
1 stop15h 12mMultiple Airlines
Tue 11/184:55 pmKEF - ONT
1 stop14h 55mMultiple Airlines
Deal found 9/10$462
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Thu 11/66:53 amONT - KEF
1 stop15h 12mMultiple Airlines
Mon 11/104:55 pmKEF - ONT
1 stop14h 55mMultiple Airlines
Deal found 9/10$565
This Trip.com deal was found by Cheapflights users on 9/10. 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 10/276:53 amONT - KEF
1 stop16h 12mMultiple Airlines
Mon 11/34:55 pmKEF - ONT
1 stop14h 55mMultiple Airlines
Deal found 9/10$583
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sun 11/96:53 amONT - KEF
1 stop15h 12mMultiple Airlines
Thu 11/134:55 pmKEF - ONT
1 stop14h 55mMultiple Airlines
Deal found 9/11$627
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Fri 11/146:00 amONT - KEF
1 stop16h 15mMultiple Airlines
Sat 11/225:00 pmKEF - ONT
1 stop14h 59mMultiple Airlines
Deal found 9/11$644
This Iberia deal was found by Cheapflights users on 9/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:53 pmONT - KEF
2 stops20h 22mMultiple Airlines
Sun 12/711:50 amKEF - ONT
2 stops20h 05mMultiple Airlines
Deal found 9/11$791
This United Airlines deal was found by Cheapflights users on 9/11. 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 stops36h 12mUnited Airlines
Deal found 9/11$853
This United deal was found by Cheapflights users on 9/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:10 amONT - KEF
2 stops18h 50mMultiple Airlines
Fri 9/269:30 amKEF - ONT
2 stops20h 00mMultiple Airlines
Deal found 9/11$938
This Air France deal was found by Cheapflights users on 9/10. 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.
Sun 9/219:50 amONT - KEF
2 stops13h 30mMultiple Airlines
Fri 10/38:45 amKEF - ONT
2 stops17h 30mMultiple Airlines
Deal found 9/10$1,010
This Icelandair deal was found by Cheapflights users on 9/10. 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 11/411:15 amONT - KEF
1 stop10h 50mMultiple Airlines
Tue 11/114:55 pmKEF - ONT
1 stop13h 10mMultiple Airlines
Deal found 9/10$1,011

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 11, 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

Tue 11/11

6:53 am-6:05 am

1 stop15h 12m

Reykjavik Keflavik Intl

Tue 11/18

4:55 pm-11:50 pm

1 stop14h 55m

$462

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 10/27

6:53 am-6:05 am

1 stop16h 12m

Reykjavik Keflavik Intl

Mon 11/3

4:55 pm-11:50 pm

1 stop14h 55m

$583

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 11/14

6:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Sat 11/22

5:00 pm-11:59 pm

1 stop14h 59m

$644

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 10/3

7:02 am-8:15 am

2 stops18h 13m

Reykjavik Keflavik Intl

Mon 10/6

9:50 am-3:02 pm

2 stops36h 12m

$853

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 1/11

9:45 am-6:05 am

1 stop12h 20m

Reykjavik Keflavik Intl

Sun 1/18

4:55 pm-9:45 pm

1 stop12h 50m

$966

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 9/21

9:50 am-6:20 am

2 stops13h 30m

Reykjavik Keflavik Intl

Fri 10/3

8:45 am-7:15 pm

2 stops17h 30m

$1,010

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 11/4

11:15 am-6:05 am

1 stop10h 50m

Reykjavik Keflavik Intl

Tue 11/11

4:55 pm-10:05 pm

1 stop13h 10m

$1,011

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 9/27

5:05 am-8:10 am

3 stops20h 05m

Reykjavik Keflavik Intl

Wed 10/1

9:30 am-5:40 pm

2 stops39h 10m

$1,038

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 9/27

7:02 am-8:10 am

2 stops18h 08m

Reykjavik Keflavik Intl

Wed 10/1

9:30 am-10:30 pm

2 stops20h 00m

$1,049

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 2/21

6:00 am-6:15 am

1 stop16h 15m

Reykjavik Keflavik Intl

Tue 2/24

5:00 pm-10:37 pm

1 stop13h 37m

$1,149

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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 $655). 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 13m. There are 4271 mi between Ontario and Reykjavik Keflavik Intl Airport.

  • What are the cheapest airlines to fly from Ontario to Reykjavik Keflavik Intl Airport one-way?

    One-way options have recently been found by users for as low as $455 on Air France. Other airlines that offer cheap prices include Air Canada from $530 and United Airlines from $536 one-way.

  • 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 $655). 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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