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$445+ Cheap flights from Keflavik Intl (KEF) to San Francisco (SFO)

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 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — SFO
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from Keflavik Intl to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Keflavik Intl (KEF) to San Francisco (SFO). 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 January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$827
(Sembo)

One-way from

$445
(Kiwi.com)
Provider with most accurate pricing for Reykjavik (REK)-San Francisco flight deals.
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From Reykjavik Keflavik Intl to San Francisco
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One-way flight from Reykjavik Keflavik Intl to San Francisco
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Find flight deals from Keflavik Intl to San Francisco

Cheapest flights from Keflavik Intl to San Francisco
Explore the most affordable flight options available from Keflavik Intl to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 20, 2026.

This Sembo deal was found by Cheapflights users on 1/19. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/84:50 pm
KEF
-
SFO
1 stop13h 54m
Multiple Airlines
Mon 3/238:59 pm
SFO
-
KEF
1 stop26h 16m
Multiple Airlines
Deal found 1/19$827
This Justfly.com deal was found by Cheapflights users on 1/17. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/234:50 pm
KEF
-
SFO
1 stop15h 32m
Icelandair
Sat 2/77:00 am
SFO
-
KEF
1 stop15h 10m
Icelandair
Deal found 1/17$850
This Expedia deal was found by Cheapflights users on 1/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1712:45 pm
KEF
-
SFO
1 stop12h 40m
Alaska Airlines
Wed 6/2410:16 am
SFO
-
KEF
1 stop15h 44m
Alaska Airlines
Deal found 1/19$907
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 6/179:15 am
KEF
-
SFO
1 stop17h 27m
United Airlines
Wed 6/2410:35 am
SFO
-
KEF
2 stops14h 55m
United Airlines
Deal found 1/19$918
This Air Canada deal was found by Cheapflights users on 1/19. 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 6/179:15 am
KEF
-
SFO
2 stops19h 16m
Air Canada
Wed 6/248:13 am
SFO
-
KEF
2 stops16h 42m
Air Canada
Deal found 1/19$919
This Mytrip deal was found by Cheapflights users on 1/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/238:20 pm
KEF
-
SFO
2 stops26h 25m
Multiple Airlines
Sat 2/712:00 pm
SFO
-
KEF
3 stops28h 15m
Multiple Airlines
Deal found 1/17$983
This British Airways deal was found by Cheapflights users on 1/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/2311:50 am
KEF
-
SFO
2 stops29h 54m
British Airways
Sat 2/75:30 pm
SFO
-
KEF
1 stop15h 35m
British Airways
Deal found 1/18$1,152

Cheapflights Fare Finder

 
Customize your flight search to find flights from Keflavik Intl to San Francisco 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 January 20, 2026.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to San Francisco that are best for you.

Fly from

Keflavik Intl

Fly to

San Francisco

Route

Depart

Return

Price

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sun 3/8

4:50 pm-11:44 pm

1 stop13h 54m

San Francisco

Mon 3/23

8:59 pm-6:15 am

1 stop26h 16m

$827

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Wed 6/17

12:45 pm-6:25 pm

1 stop12h 40m

San Francisco

Wed 6/24

10:16 am-9:00 am

1 stop15h 44m

$907

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Wed 6/17

9:15 am-7:42 pm

1 stop17h 27m

San Francisco

Wed 6/24

10:35 am-8:30 am

2 stops14h 55m

$918

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Wed 6/17

9:15 am-9:31 pm

2 stops19h 16m

San Francisco

Wed 6/24

8:13 am-7:55 am

2 stops16h 42m

$919

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sun 3/15

5:00 pm-10:19 pm

1 stop36h 19m

San Francisco

Thu 3/26

8:00 am-6:15 am

1 stop15h 15m

$2,814

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sun 3/15

5:55 pm-7:45 pm

1 stop32h 50m

San Francisco

Thu 3/26

3:13 pm-5:15 pm

2 stops19h 02m

$3,125

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sat 3/14

6:35 pm-9:38 pm

3 stops58h 03m

$445

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Fri 3/6

9:50 am-11:42 am

3 stops57h 52m

$486

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Fri 7/3

9:35 am-2:48 pm

2 stops36h 13m

$493

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 3/5

4:50 pm-11:28 am

1 stop26h 38m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 12 results
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Best time to book a flight from Keflavik Intl to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Keflavik Intl 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.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to San Francisco. 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 into for flights to San Francisco from Reykjavik Keflavik Intl?

    Most people fly into San Francisco (SFO) if they book a flight to San Francisco from Reykjavik Keflavik Intl. On average, San Francisco has 0 inbound flights from Reykjavik Keflavik Intl per day from 0 airlines. San Francisco is conveniently located just 11.8 mi from San Francisco’s city center.

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

    Departing from Reykjavik Keflavik Intl Airport to San Francisco will take you 12h 40m. The distance between Reykjavik Keflavik Intl Airport and San Francisco is about 4190 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Keflavik Intl to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
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Roseville
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Livermore
Watsonville
San Bruno
Daly City
Sunnyvale
Vacaville
Turlock
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Alternative routes for Keflavik Intl to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.
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