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$313+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — SFO
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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 August 18, 2025.

Round-trip from

$526
(Kiwi.com)

One-way from

$313
(Kiwi.com)

Popular in

February

Cheapest in

January
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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Highest demand for flights based on searches. 2% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
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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 August 18, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:35 amKEF - SFO
1 stop18h 49mMultiple Airlines
Sun 10/198:21 pmSFO - KEF
2 stops25h 34mMultiple Airlines
Deal found 8/16$526
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:35 amKEF - SFO
1 stop18h 49mMultiple Airlines
Mon 10/2012:00 pmSFO - KEF
2 stops33h 55mMultiple Airlines
Deal found 8/16$530
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:10 pmKEF - SFO
1 stop30h 20mScandinavian Airlines
Fri 11/144:40 pmSFO - KEF
1 stop34h 05mScandinavian Airlines
Deal found 8/17$532
This oojo deal was found by Cheapflights users on 8/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:10 pmKEF - SFO
1 stop30h 20mScandinavian Airlines
Mon 10/207:40 pmSFO - KEF
1 stop30h 50mScandinavian Airlines
Deal found 8/16$559
This Justfly.com deal was found by Cheapflights users on 8/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:10 pmKEF - SFO
1 stop30h 20mScandinavian Airlines
Tue 10/217:40 pmSFO - KEF
2 stops31h 35mScandinavian Airlines
Deal found 8/16$561
This oojo deal was found by Cheapflights users on 8/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:10 pmKEF - SFO
1 stop30h 20mScandinavian Airlines
Tue 9/237:40 pmSFO - KEF
1 stop37h 40mScandinavian Airlines
Deal found 8/17$597

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 August 18, 2025.
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

Sat 10/4

9:35 am-9:24 pm

1 stop18h 49m

San Francisco

Sun 10/19

8:21 pm-4:55 am

2 stops25h 34m

$526

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Mon 10/6

9:35 am-9:24 pm

1 stop18h 49m

San Francisco

Mon 10/20

12:00 pm-4:55 am

2 stops33h 55m

$526

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Wed 10/22

5:10 pm-4:30 pm

1 stop30h 20m

San Francisco

Fri 11/14

4:40 pm-10:45 am

1 stop34h 05m

$532

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Mon 10/6

5:10 pm-4:30 pm

1 stop30h 20m

San Francisco

Mon 10/20

7:40 pm-9:30 am

1 stop30h 50m

$559

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Mon 10/6

5:10 pm-4:30 pm

1 stop30h 20m

San Francisco

Tue 10/21

7:40 pm-9:30 am

1 stop30h 50m

$559

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 9/18

3:05 pm-12:16 am

2 stops40h 11m

$313

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Wed 10/15

3:05 pm-9:23 pm

2 stops37h 18m

$315

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 10/9

3:05 pm-12:14 am

2 stops40h 09m

$324

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 9/18

9:35 am-11:54 am

1 stop33h 19m

$331

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sat 10/11

3:05 pm-12:09 am

3 stops40h 04m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 12 results
1
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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 30h 20m. The distance between Reykjavik Keflavik Intl Airport and San Francisco is about 4190 mi.

  • 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.

  • What is the cheapest month to book a flight from Reykjavik Keflavik Intl Airport to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to San Francisco (average of $276). Flying from Reykjavik Keflavik Intl Airport to San Francisco in June is currently the most expensive (average of $358). 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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