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Keflavik Intl

$298+ Cheap flights from Fremont, CA 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — KEF
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Reykjavik Keflavik Intl are usually found in August or September, booked 89 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Fremont to Keflavik Intl

Cheapest flights from Fremont to Keflavik Intl
Explore the most affordable flight options available from Fremont to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This Trip.com deal was found by Cheapflights users on 12/15. 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 12/236:24 amSFO - KEF
1 stop15h 41mMultiple Airlines
Sat 12/274:55 pmKEF - SFO
1 stop15h 29mMultiple Airlines
Deal found 12/15$1,201
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:41 pmSFO - KEF
1 stop24h 34mAlaska Airlines
Sat 12/275:00 pmKEF - SFO
1 stop14h 54mAlaska Airlines
Deal found 12/16$1,347
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Tue 12/234:07 pmSFO - KEF
1 stop29h 58mMultiple Airlines
Thu 1/85:00 pmKEF - SFO
2 stops28h 18mMultiple Airlines
Deal found 12/15$1,376
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/246:24 amSFO - KEF
1 stop15h 41mMultiple Airlines
Fri 1/95:00 pmKEF - SFO
2 stops28h 31mMultiple Airlines
Deal found 12/15$1,394
This Alaska Airlines deal was found by Cheapflights users on 12/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/217:20 pmSFO - KEF
1 stop26h 55mAlaska Airlines
Fri 12/265:00 pmKEF - SFO
1 stop14h 54mAlaska Airlines
Deal found 12/14$1,396
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/246:24 amSFO - KEF
1 stop15h 41mMultiple Airlines
Sat 12/274:55 pmKEF - SFO
1 stop15h 29mMultiple Airlines
Deal found 12/15$1,397
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/239:41 pmSFO - KEF
1 stop24h 34mAlaska Airlines
Sun 12/284:50 pmKEF - SFO
1 stop14h 59mAlaska Airlines
Deal found 12/16$1,414
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/246:24 amSFO - KEF
1 stop15h 41mMultiple Airlines
Fri 12/264:55 pmKEF - SFO
1 stop15h 29mMultiple Airlines
Deal found 12/15$1,436
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Wed 12/246:24 amSFO - KEF
1 stop15h 41mMultiple Airlines
Thu 12/254:50 pmKEF - SFO
2 stops28h 23mMultiple Airlines
Deal found 12/15$1,474

Find flight deals from Fremont to Keflavik Intl

Keep the following information in mind while searching for Fremont to Keflavik Intl flight deals. Data was last updated December 16, 2025.

Most accurate provider

oojo
3 stars

Most trusted provider

oojo
3 stars

Round-trip from

$655
(Trip.com)

One-way from

$298
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$986
Provider with most accurate pricing for San Francisco-Reykjavik (REK) flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Reykjavik (REK) flights.
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From Fremont to Reykjavik Keflavik Intl
Search Deals
One-way flight from Fremont to Reykjavik Keflavik Intl
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont 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 December 16, 2025.
Use the filters below to find and compare flights from Fremont to Reykjavik Keflavik Intl Airport that are best for you.

Fly from

Fremont

Fly to

Keflavik Intl

Route

Depart

Return

Price

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Thu 3/5

4:40 pm-10:30 am

2 stops57h 50m

Reykjavik Keflavik Intl

Mon 3/9

3:40 pm-11:16 pm

2 stops38h 36m

$731

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Thu 1/29

3:10 pm-10:40 am

1 stop35h 30m

Reykjavik Keflavik Intl

Sun 2/1

11:30 am-2:35 pm

1 stop35h 05m

$733

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Sun 2/1

4:40 pm-10:45 am

1 stop34h 05m

Reykjavik Keflavik Intl

Thu 2/5

11:30 am-2:35 pm

2 stops35h 05m

$735

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Sat 4/18

4:45 pm-10:15 am

2 stops34h 30m

Reykjavik Keflavik Intl

Sun 4/26

10:30 am-2:40 pm

1 stop35h 10m

$740

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Sun 5/10

7:00 am-9:40 am

2 stops19h 40m

Reykjavik Keflavik Intl

Wed 5/13

1:25 am-2:40 pm

1 stop20h 15m

$756

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Wed 3/25

1:05 pm-11:20 pm

2 stops27h 15m

Reykjavik Keflavik Intl

Sat 4/4

6:35 pm-2:40 pm

2 stops27h 05m

$807

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Fri 3/20

5:40 pm-10:30 am

2 stops33h 50m

Reykjavik Keflavik Intl

Sun 3/29

7:40 am-11:16 pm

2 stops22h 36m

$823

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Tue 1/20

8:37 pm-6:05 am

2 stops25h 28m

Reykjavik Keflavik Intl

Sun 1/25

5:00 pm-12:05 pm

2 stops27h 05m

$833

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Tue 3/31

4:45 pm-4:15 pm

1 stop16h 30m

Reykjavik Keflavik Intl

Sat 4/4

5:10 pm-2:40 pm

1 stop28h 30m

$841

San FranciscoReykjavik

SFO - KEF

SFOKEF

San Francisco

Sat 2/28

10:15 am-11:10 am

3 stops40h 55m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 19 results
1
2

Best time to book a flight from Fremont to Keflavik Intl

Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from Fremont 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 Fremont to Reykjavik Keflavik Intl Airport

How far ahead should I book a flight from Fremont to Reykjavik Keflavik Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Keflavik Intl. Price data was last updated on December 12, 2025.

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from Fremont to Reykjavik Keflavik Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Fremont to Reykjavik Keflavik Intl Airport?

Currently, April is the cheapest month in which you can book a flight from Fremont to Reykjavik Keflavik Intl Airport (average of $167). Flying from Fremont to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of $784). 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.

What is the cheapest time of day to fly from FR8 to KEF?

Find hourly flight availability from Fremont to Keflavik Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

It’s optimal to fly from Fremont to Reykjavik Keflavik Intl Airport in the morning. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Fremont to Reykjavik Keflavik Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Keflavik Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Fremont to Reykjavik Keflavik Intl Airport flight should consider departing on Sunday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 16, 2025.
Read through reviews of airlines operating flights from Fremont to Reykjavik Keflavik Intl Airport, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,470 reviews
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,092 reviews
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
WestJet
7.2
Good
3,202 reviews
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Icelandair
7.0
Good
591 reviews
Alaska Airlines
8.0
Very good
11,470 reviews

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from Fremont to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Fremont to Reykjavik Keflavik Intl Airport?

    Departing from Fremont to Reykjavik Keflavik Intl Airport will take you 57h 50m. Fremont and Reykjavik Keflavik Intl Airport are separated by a distance of 4190 mi.

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

    To fly one-way, consider booking your trip with WestJet, which is currently one of the cheapest options available, starting at $308. Air Canada flights start at $501 while deals on Icelandair start at $533 one-way.

  • Can I find deals for flights from Fremont to Keflavik Intl that include hotel bookings?

    Yes. In addition to deals on Fremont to Keflavik Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Keflavik Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Keflavik Intl.

  • Can I find deals for business class flights from Fremont to Keflavik Intl?

    Yes. Cheapflights offers flight deals from Fremont 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 Fremont to Reykjavik Keflavik Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Fremont to Reykjavik Keflavik Intl Airport (average of $167). Flying from Fremont to Reykjavik Keflavik Intl Airport in January is currently the most expensive (average of $784). 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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Top 8 airlines flying from Fremont to Keflavik Intl

Discover the top 8 airlines that operate flights from Fremont to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$537Average$713FlexibilityNo cancel feeOn-time60%
DeltaCheapest$556Average$793FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$646Average$1,172FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$650Average$837FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$655Average$830FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$684Average$921FlexibilityNo cancel feeOn-time69%
Scandinavian AirlinesCheapest$698Average$765FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$736Average$1,106FlexibilityNo cancel feeOn-time76%

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