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OSN to RMA: distance & flight time
Osan (Osan Air Base) → Roma (Roma Airport)
4,618 mi
7,432 km · 4,013 nm
9h 31m
estimated nonstop flight time
+1h
time difference · heading south
See live OSN→RMA fares Phone-only fares on this route — call free
Flight time details
4,618 miles nonstop takes roughly 9h 31m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- 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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 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 OSN from RMA?
The flight distance from Osan (OSN) to Roma (RMA) is 4,618 miles (7,432 km, 4,013 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to RMA?
A nonstop flight takes about 9h 31m 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 Osan and Roma?
Roma is 1 hour ahead of Osan.
What is the cheapest way to fly from OSN to RMA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–RMA that never appear on search engines, with no booking fees.