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USM to SFO: distance & flight time
Ko Samui (Samui Airport) → San Francisco (San Francisco International Airport)
8,179 mi
13,163 km · 7,107 nm
16h 30m
estimated nonstop flight time
-14h
time difference · heading northeast
See live USM→SFO fares Phone-only fares on this route — call free
Flight time details
8,179 miles nonstop takes roughly 16h 30m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- USM — Samui Airport · Ko Samui, Thailand
- SFO — San Francisco International Airport · San Francisco, United States
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
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
Frequently asked questions
How far is USM from SFO?
The flight distance from Ko Samui (USM) to San Francisco (SFO) 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 USM to SFO?
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 Ko Samui and San Francisco?
San Francisco is 14 hours behind Ko Samui.
What is the cheapest way to fly from USM to SFO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–SFO that never appear on search engines, with no booking fees.