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SIA to USM: distance & flight time
Xi\'AN (Xi'an Xiguan Airport) → Ko Samui (Samui Airport)
1,809 mi
2,911 km · 1,572 nm
4h 1m
estimated nonstop flight time
-1h
time difference · heading south
See live SIA→USM fares Phone-only fares on this route — call free
Flight time details
1,809 miles nonstop takes roughly 4h 1m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- SIA — Xi'an Xiguan Airport · Xi\'AN, China
- 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 SIA
- XIY · Xi'an Xianyang International Airport22 mi away
- AKA · Ankang Wulipu Airport116 mi away
- YCU · Yuncheng Guangong Airport120 mi away
- IQN · Qingyang Airport130 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 SIA from USM?
The flight distance from Xi\'AN (SIA) to Ko Samui (USM) is 1,809 miles (2,911 km, 1,572 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SIA to USM?
A nonstop flight takes about 4h 1m 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 Xi\'AN and Ko Samui?
Ko Samui is 1 hour behind Xi\'AN.
What is the cheapest way to fly from SIA to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SIA–USM that never appear on search engines, with no booking fees.