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$336+ 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 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — SFO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$713
(Mytrip)

One-way from

$336
(Mytrip)
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 June 12, 2025.

This Mytrip deal was found by Cheapflights users on 6/9. 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 6/279:35 amKEF - SFO
2 stops30h 55mMultiple Airlines
Sun 7/67:10 amSFO - KEF
3 stops18h 05mMultiple Airlines
Deal found 6/9$713
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Fri 6/279:35 amKEF - SFO
1 stop18h 50mWestJet
Sun 7/67:30 amSFO - KEF
1 stop17h 45mWestJet
Deal found 6/9$779
This Justfly.com deal was found by Cheapflights users on 6/10. 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 7/215:10 pmKEF - SFO
1 stop23h 34mIcelandair
Tue 8/57:49 pmSFO - KEF
1 stop11h 11mIcelandair
Deal found 6/10$821
This Priceline deal was found by Cheapflights users on 6/9. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/259:30 amKEF - SFO
1 stop19h 12mAir Canada
Fri 8/111:40 amSFO - KEF
1 stop13h 40mAir Canada
Deal found 6/9$843
This United Airlines deal was found by Cheapflights users on 6/10. 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 7/111:00 amKEF - SFO
2 stops16h 30mUnited Airlines
Sun 7/138:50 amSFO - KEF
2 stops15h 10mUnited Airlines
Deal found 6/10$851
This Justfly.com deal was found by Cheapflights users on 6/10. 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.
Sun 7/201:05 amKEF - SFO
2 stops46h 25mScandinavian Airlines
Tue 8/57:40 pmSFO - KEF
1 stop21h 30mScandinavian Airlines
Deal found 6/10$985
This Gurufare deal was found by Cheapflights users on 6/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/261:15 amKEF - SFO
1 stop24h 45mLufthansa
Sun 7/67:00 amSFO - KEF
1 stop17h 00mLufthansa
Deal found 6/9$1,034
This Austrian Airlines deal was found by Cheapflights users on 6/9. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/2612:10 amKEF - SFO
2 stops25h 50mAustrian Airlines
Sun 7/62:40 pmSFO - KEF
2 stops49h 40mAustrian Airlines
Deal found 6/9$1,123
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2012:45 amKEF - SFO
1 stop22h 25mSWISS
Tue 8/57:30 pmSFO - KEF
1 stop29h 50mSWISS
Deal found 6/10$1,181
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/512:15 amKEF - SFO
2 stops23h 25mTurkish Airlines
Sun 7/66:45 pmSFO - KEF
2 stops37h 40mTurkish Airlines
Deal found 6/9$1,401
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1110:45 amKEF - SFO
2 stops18h 55mBritish Airways
Fri 8/2210:46 pmSFO - KEF
2 stops27h 44mBritish Airways
Deal found 6/11$3,063

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 June 12, 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

Fri 6/27

9:35 am-9:30 am

2 stops30h 55m

San Francisco

Sun 7/6

7:10 am-8:15 am

3 stops18h 05m

$713

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Fri 6/27

9:35 am-9:25 pm

1 stop18h 50m

San Francisco

Sun 7/6

7:30 am-8:15 am

1 stop17h 45m

$779

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Mon 7/21

5:10 pm-9:44 am

1 stop23h 34m

San Francisco

Tue 8/5

7:49 pm-2:00 pm

1 stop11h 11m

$821

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Fri 7/25

9:30 am-9:42 pm

1 stop19h 12m

San Francisco

Fri 8/1

11:40 am-8:20 am

1 stop13h 40m

$843

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Tue 7/1

11:00 am-8:30 pm

2 stops16h 30m

San Francisco

Sun 7/13

8:50 am-7:00 am

2 stops15h 10m

$851

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sun 7/20

1:05 am-4:30 pm

2 stops46h 25m

San Francisco

Tue 8/5

7:40 pm-12:10 am

1 stop21h 30m

$985

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 6/26

1:15 am-7:00 pm

1 stop24h 45m

San Francisco

Sun 7/6

7:00 am-7:00 am

1 stop17h 00m

$1,034

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Thu 6/26

12:10 am-7:00 pm

2 stops25h 50m

San Francisco

Sun 7/6

2:40 pm-11:20 pm

2 stops49h 40m

$1,123

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sun 7/20

12:45 am-4:10 pm

1 stop22h 25m

San Francisco

Tue 8/5

7:30 pm-8:20 am

1 stop29h 50m

$1,181

ReykjavikSan Francisco

KEF - SFO

KEFSFO

Reykjavik Keflavik Intl

Sat 7/5

12:15 am-4:40 pm

2 stops23h 25m

San Francisco

Sun 7/6

6:45 pm-3:25 pm

2 stops37h 40m

$1,401

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 23 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.

Cheapflights Insights

Everything you need to know about your flight from Reykjavik Keflavik Intl Airport to San Francisco

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated June 12, 2025.
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Austrian Airlines
7.6
Good
802 reviews
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Finnair
7.6
Good
1,290 reviews
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
SWISS
7.5
Good
1,623 reviews
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
United Airlines
7.4
Good
8,790 reviews
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well
Turkish Airlines
7.3
Good
3,848 reviews
Austrian Airlines
7.6
Good
802 reviews

Overall

7.6

Entertainment

6.8

Comfort

7.3

Food

6.8

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Grant,Jun 2025

VIE - FRA

A delay was caused by computer malfunctions after we left the gate. It was handled well

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.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $398. However, be on the lookout for offers from British Airways and Icelandair, as they are both options that can get you from Reykjavik Keflavik Intl Airport to San Francisco for a low price.

  • 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 $364). 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
Roseville
Mountain View
South San Francisco
Livermore
Turlock
Santa Cruz
Manteca
Fairfield
Watsonville
Antioch
Hollister
Milpitas
Newark
Hayward
Alameda
Sunnyvale
Daly City
Union City
Campbell
Capitola

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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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