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$1,300+ 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 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — KGS
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
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 11, 2026.

This FlightHub deal was found by Cheapflights users on 5/11. 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 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 stops29h 35m
Multiple Airlines
Mon 8/248:50 pm
KGS
-
SFO
2 stops25h 50m
Multiple Airlines
Deal found 5/11$1,300
This SmartFares deal was found by Cheapflights users on 5/9. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/239:05 pm
SFO
-
KGS
2 stops37h 15m
Multiple Airlines
Tue 6/308:30 pm
KGS
-
SFO
1 stop29h 45m
Multiple Airlines
Deal found 5/9$1,359

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 11, 2026.

Round-trip from

$1,300
(FlightHub)
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 11, 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

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Mon 6/22

9:05 pm-12:40 pm

2 stops29h 35m

Kos

Mon 8/24

8:50 pm-12:40 pm

2 stops25h 50m

$1,300

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Tue 6/23

9:05 pm-8:20 pm

2 stops37h 15m

Kos

Tue 6/30

8:30 pm-4:15 pm

1 stop29h 45m

$1,359
Quickest round-trip

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Mon 6/1

9:05 pm-12:40 pm

2 stops29h 35m

Kos

Wed 6/10

1:30 pm-12:45 am

2 stops21h 15m

$1,441

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Mon 6/1

7:30 pm-7:55 pm

2 stops38h 25m

Kos

Wed 6/10

7:55 pm-7:00 pm

1 stop33h 05m

$1,442

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Sun 9/6

5:05 pm-5:30 pm

2 stops62h 25m

Kos

Thu 9/10

1:05 pm-2:00 pm

2 stops34h 55m

$1,867

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

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.

  • 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.

Browse thousands of different options on Cheapflights for your next trip

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