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APA to USM: distance & flight time
Denver (Centennial Airport) → Ko Samui (Samui Airport)
8,686 mi
13,979 km · 7,548 nm
17h 30m
estimated nonstop flight time
+13h
time difference · heading northwest
See live APA→USM fares Phone-only fares on this route — call free
Flight time details
8,686 miles nonstop takes roughly 17h 30m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- APA — Centennial Airport · Denver, 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 APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal Airport38 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 APA from USM?
The flight distance from Denver (APA) to Ko Samui (USM) is 8,686 miles (13,979 km, 7,548 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from APA to USM?
A nonstop flight takes about 17h 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 Denver and Ko Samui?
Ko Samui is 13 hours ahead of Denver.
What is the cheapest way to fly from APA to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on APA–USM that never appear on search engines, with no booking fees.