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SFO to USM: distance & flight time
San Francisco (San Francisco International Airport) → Ko Samui (Samui Airport)
8,179 mi
13,163 km · 7,107 nm
16h 30m
estimated nonstop flight time
+14h
time difference · heading northwest
See live SFO→USM fares Phone-only fares on this route — call free
Flight time details
8,179 miles nonstop takes roughly 16h 30m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- SFO — San Francisco International Airport · San Francisco, United States
- USM — Samui Airport · Ko Samui, Thailand
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near SFO
- SQL · San Carlos Airport10 mi away
- HAF · Half Moon Bay Airport10 mi away
- OAK · Metropolitan Oakland International Airport11 mi away
- NGZ · Alameda Naval Air Station12 mi away
Near USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Frequently asked questions
How far is SFO from USM?
The flight distance from San Francisco (SFO) to Ko Samui (USM) is 8,179 miles (13,163 km, 7,107 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SFO to USM?
A nonstop flight takes about 16h 30m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between San Francisco and Ko Samui?
Ko Samui is 14 hours ahead of San Francisco.
What is the cheapest way to fly from SFO to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SFO–USM that never appear on search engines, with no booking fees.