Need help booking?
Unpublished phone-only deals available
RCA to KOS: distance & flight time
Rapid City (Ellsworth Air Force Base) → Sihanoukville (Sihanoukville International Airport)
8,301 mi
13,359 km · 7,213 nm
16h 45m
estimated nonstop flight time
+13h
time difference · heading northwest
See live RCA→KOS fares Phone-only fares on this route — call free
Flight time details
8,301 miles nonstop takes roughly 16h 45m 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
- RCA — Ellsworth Air Force Base · Rapid City, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 RCA
- RAP · Rapid City Regional Airport7 mi away
- SPF · Black Hills Airport-Clyde Ice Field41 mi away
- CDR · Chadron Municipal Airport90 mi away
- GCC · Gillette Campbell County Airport121 mi away
Near KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is RCA from KOS?
The flight distance from Rapid City (RCA) to Sihanoukville (KOS) is 8,301 miles (13,359 km, 7,213 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RCA to KOS?
A nonstop flight takes about 16h 45m 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 Sihanoukville?
Sihanoukville is 13 hours ahead of Rapid City.
What is the cheapest way to fly from RCA to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RCA–KOS that never appear on search engines, with no booking fees.