Find cheap flights from San Francisco to Kos from $737

In the last 3 days, the lowest price for a flight from San Francisco to Kos was $737 for a one-way ticket and $1,036 for a round-trip.

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We unfortunately don’t have that data for this specific route.

Star Alliance is the only airline alliance operating flights between San Francisco and Kos.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Kos.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kos from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Kos with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and KGS can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Kos from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.