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IWS to USM: distance & flight time
Houston (West Houston Airport) → Ko Samui (Samui Airport)
9,523 mi
15,325 km · 8,275 nm
19h 8m
estimated nonstop flight time
+12h
time difference · heading northwest
See live IWS→USM fares Phone-only fares on this route — call free
Flight time details
9,523 miles nonstop takes roughly 19h 8m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- IWS — West Houston Airport · Houston, 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 IWS
- IAH · George Bush Intercontinental Houston Airport23 mi away
- AAP · Andrau Airpark8 mi away
- SGR · Sugar Land Regional Airport14 mi away
- DWH · David Wayne Hooks Memorial Airport18 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 IWS from USM?
The flight distance from Houston (IWS) to Ko Samui (USM) is 9,523 miles (15,325 km, 8,275 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IWS to USM?
A nonstop flight takes about 19h 8m 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 Houston and Ko Samui?
Ko Samui is 12 hours ahead of Houston.
What is the cheapest way to fly from IWS to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IWS–USM that never appear on search engines, with no booking fees.