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Keflavik Intl

$500+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — KEF
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 30, 2025.

Round-trip from

$516
(Trip.com)

One-way from

$500
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$999
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 ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($15 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 30, 2025.

This Trip.com deal was found by Cheapflights users on 6/29. 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 8/1112:59 amONT - KEF
1 stop22h 01mMultiple Airlines
Wed 8/204:50 pmKEF - ONT
1 stop14h 00mMultiple Airlines
Deal found 6/29$516
This United Airlines deal was found by Cheapflights users on 6/28. 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 8/126:31 pmONT - KEF
2 stops30h 39mUnited Airlines
Tue 8/1912:00 pmKEF - ONT
1 stop17h 30mUnited Airlines
Deal found 6/28$627
This Delta deal was found by Cheapflights users on 6/28. 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.
Sun 8/107:05 amONT - KEF
2 stops16h 15mDelta
Sun 8/1711:25 amKEF - ONT
2 stops17h 55mDelta
Deal found 6/28$632
This Air Canada deal was found by Cheapflights users on 6/29. 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.
Wed 8/276:00 amONT - KEF
2 stops19h 15mAir Canada
Wed 9/39:30 amKEF - ONT
2 stops39h 07mAir Canada
Deal found 6/29$670
This KLM deal was found by Cheapflights users on 6/28. 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.
Fri 9/56:05 amONT - KEF
2 stops17h 55mKLM
Fri 9/1211:25 amKEF - ONT
2 stops17h 58mKLM
Deal found 6/28$736

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 30, 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

Mon 8/11

12:59 am-6:00 am

1 stop22h 01m

Reykjavik Keflavik Intl

Wed 8/20

4:50 pm-11:50 pm

1 stop14h 00m

$516

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 8/12

6:31 pm-8:10 am

2 stops30h 39m

Reykjavik Keflavik Intl

Tue 8/19

12:00 pm-10:30 pm

1 stop17h 30m

$627

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sun 8/10

7:05 am-6:20 am

2 stops16h 15m

Reykjavik Keflavik Intl

Sun 8/17

11:25 am-10:20 pm

2 stops17h 55m

$632

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Wed 8/27

6:00 am-8:15 am

2 stops19h 15m

Reykjavik Keflavik Intl

Wed 9/3

9:30 am-5:37 pm

2 stops39h 07m

$670

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Fri 9/5

6:05 am-7:00 am

2 stops17h 55m

Reykjavik Keflavik Intl

Fri 9/12

11:25 am-10:23 pm

2 stops17h 58m

$736

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/2

7:00 am-8:30 am

1 stop18h 30m

$500

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Tue 9/2

5:10 am-8:10 am

2 stops20h 00m

$533

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Sat 10/18

9:10 am-6:00 am

1 stop13h 50m

$700

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Thu 9/4

7:22 pm-2:00 pm

1 stop11h 38m

$1,655

OntarioReykjavik

ONT - KEF

ONTKEF

Ontario

Mon 7/14

12:59 am-10:00 am

2 stops26h 01m

$3,066

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 June 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines 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.
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,852 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.1
Good
9,657 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Icelandair
7.0
Good
514 reviews
Delta
8.0
Very good
7,969 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 $533 and Icelandair from $1,655 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Keflavik
Hveragerdi

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