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KOS to RMA: distance & flight time
Sihanoukville (Sihanoukville International Airport) → Roma (Roma Airport)
3,968 mi
6,386 km · 3,448 nm
8h 15m
estimated nonstop flight time
+3h
time difference · heading southeast
See live KOS→RMA fares Phone-only fares on this route — call free
Flight time details
3,968 miles nonstop takes roughly 8h 15m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
- RMA — Roma Airport · Roma, Australia
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 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
Near RMA
- XTO · Taroom Airport87 mi away
- SGO · St George Airport105 mi away
- CCL · Chinchilla Airport115 mi away
- TDR · Theodore Airport135 mi away
Frequently asked questions
How far is KOS from RMA?
The flight distance from Sihanoukville (KOS) to Roma (RMA) is 3,968 miles (6,386 km, 3,448 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOS to RMA?
A nonstop flight takes about 8h 15m 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 Sihanoukville and Roma?
Roma is 3 hours ahead of Sihanoukville.
What is the cheapest way to fly from KOS to RMA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOS–RMA that never appear on search engines, with no booking fees.