Need help booking?
Unpublished phone-only deals available
RAP to USM: distance & flight time
Rapid City (Rapid City Regional Airport) → Ko Samui (Samui Airport)
8,461 mi
13,616 km · 7,352 nm
17h 3m
estimated nonstop flight time
+13h
time difference · heading northwest
See live RAP→USM fares Phone-only fares on this route — call free
Flight time details
8,461 miles nonstop takes roughly 17h 3m 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
- RAP — Rapid City Regional Airport · Rapid City, 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 RAP
- RCA · Ellsworth Air Force Base7 mi away
- SPF · Black Hills Airport-Clyde Ice Field47 mi away
- CDR · Chadron Municipal Airport83 mi away
- GCC · Gillette Campbell County Airport125 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 RAP from USM?
The flight distance from Rapid City (RAP) to Ko Samui (USM) is 8,461 miles (13,616 km, 7,352 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RAP to USM?
A nonstop flight takes about 17h 3m 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 Rapid City and Ko Samui?
Ko Samui is 13 hours ahead of Rapid City.
What is the cheapest way to fly from RAP to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RAP–USM that never appear on search engines, with no booking fees.