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RAL to USM: distance & flight time
Riverside (Riverside Municipal Airport) → Ko Samui (Samui Airport)
8,554 mi
13,766 km · 7,433 nm
17h 14m
estimated nonstop flight time
+14h
time difference · heading northwest
See live RAL→USM fares Phone-only fares on this route — call free
Flight time details
8,554 miles nonstop takes roughly 17h 14m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- RAL — Riverside Municipal Airport · Riverside, 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 RAL
- ONT · Ontario International Airport11 mi away
- CNO · Chino Airport11 mi away
- RIV · March ARB Airport12 mi away
- LAX · Los Angeles International Airport55 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 RAL from USM?
The flight distance from Riverside (RAL) to Ko Samui (USM) is 8,554 miles (13,766 km, 7,433 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RAL to USM?
A nonstop flight takes about 17h 14m 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 Riverside and Ko Samui?
Ko Samui is 14 hours ahead of Riverside.
What is the cheapest way to fly from RAL to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RAL–USM that never appear on search engines, with no booking fees.