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Keflavik Intl

$359+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Jul 30 — Aug 61
Wed 7/30
Wed 8/6
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 July 25, 2025.

Round-trip from

$566
(Trip.com)

One-way from

$359
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$974
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. 2% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 25, 2025.

This Trip.com deal was found by Cheapflights users on 7/23. 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.
Wed 8/205:03 pmONT - KEF
1 stop13h 57mMultiple Airlines
Tue 8/2610:30 amKEF - ONT
1 stop19h 54mMultiple Airlines
Deal found 7/23$566
This United Airlines deal was found by Cheapflights users on 7/24. 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 9/77:00 amONT - KEF
2 stops17h 00mUnited Airlines
Mon 9/2212:00 pmKEF - ONT
1 stop17h 30mUnited Airlines
Deal found 7/24$706
This Delta deal was found by Cheapflights users on 7/24. 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.
Tue 9/3011:55 amONT - KEF
2 stops14h 35mDelta
Tue 10/2111:25 amKEF - ONT
2 stops18h 16mDelta
Deal found 7/24$773
This Air France deal was found by Cheapflights users on 7/24. 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 9/2811:55 amONT - KEF
2 stops14h 35mAir France
Thu 10/2311:25 amKEF - ONT
2 stops18h 16mAir France
Deal found 7/24$823
This Ovago deal was found by Cheapflights users on 7/24. 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.
Sat 9/61:10 pmONT - KEF
2 stops37h 35mBritish Airways
Fri 9/128:45 amKEF - ONT
2 stops41h 09mBritish Airways
Deal found 7/24$859

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 July 25, 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 8/20

5:03 pm-2:00 pm

1 stop13h 57m

Reykjavik Keflavik Intl

Tue 8/26

10:30 am-11:24 pm

1 stop19h 54m

$566

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 9/7

7:00 am-7:00 am

2 stops17h 00m

Reykjavik Keflavik Intl

Mon 9/22

12:00 pm-10:30 pm

1 stop17h 30m

$706

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/30

11:55 am-9:30 am

2 stops14h 35m

Reykjavik Keflavik Intl

Tue 10/21

11:25 am-10:41 pm

2 stops18h 16m

$773

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 9/28

11:55 am-9:30 am

2 stops14h 35m

Reykjavik Keflavik Intl

Thu 10/23

11:25 am-10:41 pm

2 stops18h 16m

$823

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 9/6

1:10 pm-9:45 am

2 stops37h 35m

Reykjavik Keflavik Intl

Fri 9/12

8:45 am-6:54 pm

2 stops41h 09m

$859

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 8/12

12:59 am-4:55 am

2 stops20h 56m

$359

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 8/27

7:00 am-8:10 am

2 stops18h 10m

$510

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 9/3

5:10 am-8:15 am

2 stops20h 05m

$512

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 8/15

9:50 am-7:00 am

2 stops14h 10m

$536

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 9/28

10:06 am-5:55 am

1 stop12h 49m

$877

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 13 results
1
2

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 $653). 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.

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 July 25, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and KLM from Ontario to Reykjavik Keflavik Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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
7,967 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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
1,375 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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
1,462 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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
8,876 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Food

7.1

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 $510 on United Airlines. Other airlines that offer cheap prices include Air Canada from $512 and Air France 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 $653). 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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