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GDC to USM: distance & flight time
Greenville (Donaldson Field Airport) → Ko Samui (Samui Airport)
9,371 mi
15,082 km · 8,144 nm
18h 51m
estimated nonstop flight time
—
time difference · heading north
See live GDC→USM fares Phone-only fares on this route — call free
Flight time details
9,371 miles nonstop takes roughly 18h 51m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- GDC — Donaldson Field Airport · Greenville, 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 GDC
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 GDC from USM?
The flight distance from Greenville (GDC) to Ko Samui (USM) is 9,371 miles (15,082 km, 8,144 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GDC to USM?
A nonstop flight takes about 18h 51m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GDC to USM?
Nonstop service on GDC–USM depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 18h 51m nonstop estimate.
What is the cheapest way to fly from GDC to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GDC–USM that never appear on search engines, with no booking fees.
Why are some GDC to USM fares phone-only?
Consolidator contracts let us sell certain GDC–USM tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.