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Cheap flights from San Francisco to Kos from $1,866

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Kos departing on 8/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from San Francisco to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Emirates Logo
5:05 pm - 5:30 pm
SFO
-
KGS
38h 25m
2 stops
Emirates Logo
6:10 pm - 2:00 pm
KGS
-
SFO
29h 50m
2 stops
$1,866Emirates
Mon, Aug 31 - Thu, Sep 3
Emirates Logo
5:05 pm - 5:30 pm
SFO
-
KGS
38h 25m
2 stops
Emirates Logo
12:35 pm - 2:00 pm
KGS
-
SFO
35h 25m
2 stops
$3,857Emirates
Mon, Aug 10 - Mon, Aug 17

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Emirates flights from San Francisco to Kos

Our best Emirates deals on San Francisco to Kos flight tickets
Emirates
Aug 31
SFO5:05 pmSan Francisco
38h 25m
2 stops
KGS5:30 pmKos
Sep 3
KGS6:10 pmKos
29h 50m
2 stops
SFO2:00 pmSan Francisco
$1,866
Emirates
Aug 10
SFO5:05 pmSan Francisco
38h 25m
2 stops
KGS5:30 pmKos
Aug 17
KGS12:35 pmKos
35h 25m
2 stops
SFO2:00 pmSan Francisco
$3,857

momondo 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, momondo users made 832,500 searches. Data last updated June 29, 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

Mon 8/31

5:05 pm-5:30 pm

2 stops38h 25m

Kos

Thu 9/3

6:10 pm-2:00 pm

2 stops29h 50m

$1,866

San FranciscoKos

SFO - KGS

SFOKGS

San Francisco

Mon 8/10

5:05 pm-5:30 pm

2 stops38h 25m

Kos

Mon 8/17

12:35 pm-2:00 pm

2 stops35h 25m

$3,857

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from San Francisco to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from San Francisco to Kos according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Francisco to Kos (SFO to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to Kos

Fastest flight time

38h 25m

Direct flights

None
The fastest flight from San Francisco to Kos takes 38h 25m
There are no direct flights from San Francisco to Kos. There are no popular flight routes from San Francisco to Kos.
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Frequently asked questions about flying from San Francisco to Kos

  • How far is San Francisco to Kos by plane?

    There are 6921.7 mi between San Francisco and Kos. In terms of flight time, this usually takes a little over 38h 25m.

  • When did momondo last update prices for flights from San Francisco Airport to Kos Airport?

    Prices for flights from San Francisco Airport to Kos Airport refresh daily.

  • How old do you have to be to fly from San Francisco Airport to Kos Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Francisco Airport to Kos Airport.

  • What documentation or ID do you need to fly to Kos Airport?

    The necessary travel and health documents for your Kos Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from San Francisco to Kos

  • How do I get Price Alerts for flights from San Francisco to Kos?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to San Francisco from Kos. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from San Francisco to Kos with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near Kos?

Book flights to Kos if you plan to visit one of these locations
Kardamena
Marmari

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to Kos?

It is quick and easy to find San Francisco to Kos flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kos that suits you.

Can I find flights from San Francisco to Kos with flexible booking policies on momondo?

All flight searches from San Francisco to Kos on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from San Francisco to Kos?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kos from San Francisco.

I’m not ready to book a flight from San Francisco to Kos right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Francisco to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know when they change.

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Wed 7/29
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