Cheap Flights from San Francisco International to Samui International

Compare San Francisco International to Samui International flight deals

Find the cheapest month or even day of the year to fly to Samui International

Book the best Samui International fare with no extra fees

Find the cheapest month to fly from San Francisco International to Samui International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to Samui International flights are currently cheapest in April.

San Francisco International to Samui International: Alternative routes

Compare routes from San Francisco International to Koh Samui below. You may find an airport to fly into that's cheaper, faster, or easier than Samui International.

San Francisco to Koh Samui: Flight information

The things to know before you go.
Cheapest flight foundRs152,110
Cheapest month to flyApril

Finding cheap flights from San Francisco International to Samui International: Frequently asked questions

The best price we found for a return flight from San Francisco International to Samui International is Rs272,454. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Francisco International to Samui International. But we found flights with one or more stops from Rs272,454.
As of April 2025, there are no flights flying from San Francisco International to Samui International.
The cheapest month to fly from San Francisco International to Samui International is usually April 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to Samui International Airport on Saturday, 6 September 2025.
No airlines currently offer direct flights between San Francisco International Airport and Samui International Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Samui International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Koh Samui is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Singapore Airlines offers the cheapest flight tickets to Samui International.

Travelling from San Francisco International Airport (SFO) to Koh Samui Airport (USM): what you need to know

  • You can expect bigger queues in popular months such as August and other peak seasons. Arriving up to four hours in advance for international flights and two hours for domestic departures is a wise move.

  • Finding a stopover for flights from San Francisco International Airport to Koh Samui Airport is simple with our search tool. Just uncheck 'Direct flights only' to see your options. Hong Kong International Airport is a sought-after stopover when travelling from SFO to USM.

  • Don't forget, you may need a visa to enter Thailand. Visa requirements can differ and travel documentation requirements change frequently. Before locking in your cheap ticket from SFO to USM, check with your carrier and your destination country's local consulate or embassy for up-to-date information.

How to find the cheapest flights from San Francisco International Airport (SFO) to Koh Samui Airport (USM)

  • Rs152,110 is the best price for a one-way ticket from San Francisco International Airport to Koh Samui Airport. Return flights start at Rs272,394. These prices may change based on availability.

  • To get your hands on cheap flights from SFO to USM, book as early as you can. Airlines generally offer the most competitive fares when flights are first released.

  • The 'Whole month' search function shows you the cheapest tickets from San Francisco International Airport to Koh Samui Airport throughout the entire month. It's a great way to snap up a bargain if your travel dates are flexible.

  • Sign into your online account or use the app to create a Price Alert. We'll let you know right away if there's a cheaper deal on this route. It doesn't take long, and it'll save you time checking for cheap flights from SFO to USM every day.

  • Use filters to tailor your flights from San Francisco International Airport to Koh Samui Airport. Simply select your ideal departure and arrival times, number of stops and airlines. Or sort your results by 'Cheapest' to see the best deals.

Handy information about San Francisco International Airport (SFO)

Arriving at Koh Samui Airport (USM)

Getting from Koh Samui Airport (USM) to central Thailand

  • Koh Samui Airport to the centre of Thailand is about 611 kilometres. If you're getting a cab or renting a car, do a little research to make your trip as smooth as possible. Journey times can vary based on traffic conditions and the time of day.

When to fly to Koh Samui Airport (USM)

  • It's time to plan your trip dates for your flight from San Francisco International Airport to Koh Samui Airport. August is the most popular month to visit Thailand. If you like a quieter vibe, go in February.

  • When booking your flight from San Francisco International Airport to Koh Samui Airport, think about the kind of weather you like. April is the warmest month in Thailand, with temperatures ranging from 24ºC to 41ºC.

  • December has average temperatures of between 16ºC and 32ºC. Look for cheap flights from SFO to USM around that time if you like cooler conditions.

More about Thailand

  • You've got your flight from SFO to USM organised, now all you need to do is decide where you're going to stay in Thailand. Book Phutawan Resort and use it as your base to discover this destination.

  • All great holidays should include a little sightseeing. Wat Pu Muang, Wat Ma Muang Ched Ton and Wat Tha Luang are essential stops on your Thailand itinerary.

Complete your Koh Samui trip with hotels and a car rental

  • Comparing flights is not the only thing we're good at. Once you've booked your cheap ticket to Koh Samui Airport, check out our great car rental offers that'll give you the flexibility and freedom to travel around at your own pace. Then, have a look at our exclusive rates for hotels to find the perfect Koh Samui stay.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.