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$1,138+ Cheap flights from San Francisco (SFO) to Kos (KGS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — KGS
Jun 23 — Jun 301
Tue 6/23
Tue 6/30
1 adult, Economy
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Cheap flight deals from San Francisco to Kos

Cheapest flights from San Francisco to Kos
Explore the most affordable flight options available from San Francisco to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 24, 2026.

This Justfly.com deal was found by Cheapflights users on 5/23. 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 9/251:55 pm
SFO
-
KGS
1 stop19h 50m
Lufthansa
Sat 10/109:40 am
KGS
-
SFO
2 stops24h 50m
Lufthansa
Deal found 5/23$1,138
This Justfly.com deal was found by Cheapflights users on 5/23. 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 9/258:15 am
SFO
-
KGS
2 stops25h 20m
Multiple Airlines
Sat 10/109:40 am
KGS
-
SFO
2 stops24h 50m
Multiple Airlines
Deal found 5/23$1,172
This FlightHub deal was found by Cheapflights users on 5/24. 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.
Mon 6/229:05 pm
SFO
-
KGS
2 stops27h 20m
Multiple Airlines
Mon 8/248:50 pm
KGS
-
SFO
2 stops25h 50m
Multiple Airlines
Deal found 5/24$1,267
This Mytrip deal was found by Cheapflights users on 5/20. 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.
Sat 7/49:05 pm
SFO
-
KGS
2 stops25h 50m
Lufthansa
Sat 7/119:40 am
KGS
-
SFO
2 stops20h 22m
Lufthansa
Deal found 5/20$1,284
This Gotogate deal was found by Cheapflights users on 5/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:35 pm
SFO
-
KGS
1 stop28h 35m
SWISS
Sat 7/118:45 pm
KGS
-
SFO
1 stop29h 30m
SWISS
Deal found 5/20$1,330
This Mytrip deal was found by Cheapflights users on 5/20. 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.
Sat 7/48:10 am
SFO
-
KGS
2 stops28h 15m
Multiple Airlines
Sat 7/118:35 am
KGS
-
SFO
3 stops37h 33m
Multiple Airlines
Deal found 5/20$1,388

Find flight deals from San Francisco to Kos

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Kos (KGS). 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 May 24, 2026.

Round-trip from

$1,138
(Justfly.com)
From San Francisco to Kos
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Kos 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 May 24, 2026.
Use the filters below to find and compare flights from San Francisco to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Sat 7/4

9:05 pm-8:55 am

2 stops25h 50m

Kos

Sat 7/11

9:40 am-8:02 pm

2 stops20h 22m

$1,284

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Mon 6/22

9:05 pm-10:25 am

2 stops27h 20m

Kos

Mon 8/24

8:50 pm-6:24 pm

2 stops31h 34m

$1,301

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Sat 7/4

8:10 am-10:25 pm

2 stops28h 15m

Kos

Sat 7/11

8:35 am-12:08 pm

3 stops37h 33m

$1,388
Cheapest one-way
Quickest one-way

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Sat 7/4

5:05 pm-5:30 pm

2 stops38h 25m

$1,553

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/20

Sorted by cheapest first

Best time to book a flight from San Francisco to Kos

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

    Lufthansa can get you from San Francisco to Kos in just under 25h 50m. Your travel time can differ by up to . The distance between San Francisco and Kos is about 6932 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Kos 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

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