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Keflavik Intl

$361+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$583
(United Airlines)

One-way from

$361
(Kiwi.com)

Popular in

September

Cheapest in

March

Average price

$967
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. 3% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 7/277:00 amONT - KEF
1 stop18h 30mUnited Airlines
Tue 8/199:50 amKEF - ONT
2 stops33h 42mUnited Airlines
Deal found 6/11$583
This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/16:31 pmONT - KEF
2 stops54h 44mAir Canada
Thu 8/219:30 amKEF - ONT
2 stops38h 59mAir Canada
Deal found 6/11$589
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/309:44 amONT - KEF
2 stops14h 16mDelta
Mon 8/411:25 amKEF - ONT
2 stops18h 02mDelta
Deal found 6/10$630
This KLM deal was found by Cheapflights users on 6/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:05 amONT - KEF
2 stops16h 15mKLM
Thu 9/2511:25 amKEF - ONT
2 stops18h 16mKLM
Deal found 6/12$684
This Trip.com deal was found by Cheapflights users on 6/12. 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 9/410:46 amONT - KEF
1 stop20h 14mMultiple Airlines
Mon 9/810:30 amKEF - ONT
1 stop13h 46mMultiple Airlines
Deal found 6/12$699
This Air France deal was found by Cheapflights users on 6/12. 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 9/79:50 amONT - KEF
2 stops13h 30mAir France
Thu 9/1111:25 amKEF - ONT
2 stops18h 16mAir France
Deal found 6/12$1,013

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 June 12, 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

Sun 7/27

7:00 am-8:30 am

1 stop18h 30m

Reykjavik Keflavik Intl

Tue 8/19

9:50 am-12:32 pm

2 stops33h 42m

$583

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 8/1

6:31 pm-8:15 am

2 stops54h 44m

Reykjavik Keflavik Intl

Thu 8/21

9:30 am-5:29 pm

2 stops38h 59m

$589

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 7/30

9:44 am-7:00 am

2 stops14h 16m

Reykjavik Keflavik Intl

Tue 8/5

9:30 am-11:42 pm

2 stops21h 12m

$630

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/9

7:05 am-6:20 am

2 stops16h 15m

Reykjavik Keflavik Intl

Thu 9/25

11:25 am-10:41 pm

2 stops18h 16m

$684

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 9/4

10:46 am-2:00 pm

1 stop20h 14m

Reykjavik Keflavik Intl

Mon 9/8

10:30 am-5:16 pm

1 stop13h 46m

$699

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 9/7

9:50 am-6:20 am

2 stops13h 30m

Reykjavik Keflavik Intl

Thu 9/11

11:25 am-10:41 pm

2 stops18h 16m

$1,013

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 7/16

2:21 pm-2:00 pm

1 stop16h 39m

Reykjavik Keflavik Intl

Tue 9/30

4:50 pm-10:44 am

2 stops24h 54m

$1,083

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 8/13

5:21 pm-8:15 am

2 stops31h 54m

$361

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/28

6:28 pm-8:10 am

2 stops30h 42m

$500

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 7/26

1:34 pm-8:15 am

2 stops35h 41m

$506

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 13 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 $659). 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.

Rainfall in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Reykjavik Keflavik Intl Airport ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. May is typically the driest time to visit Reykjavik Keflavik Intl Airport when rainfall is around 1.6 in.

Temperature in Keflavik Intl by month

Plan your trip to Keflavik Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Reykjavik Keflavik Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 51.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Keflavik Intl

Get insights into the airlines that provide service to Keflavik Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Keflavik Intl. Reviews last updated June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and KLM from Ontario to Reykjavik by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
KLM
7.8
Good
1,358 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Air France
7.5
Good
1,463 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Food

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $500 on United Airlines. Other airlines that offer cheap prices include Air Canada from $506 and Icelandair from $1,914 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 $659). 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

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Keflavik

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