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TRS to OSN: distance & flight time
Ronchi De Legionari (Trieste–Friuli Venezia Giulia Airport) → Osan (Osan Air Base)
5,379 mi
8,657 km · 4,674 nm
11h 1m
estimated nonstop flight time
+7h
time difference · heading northeast
See live TRS→OSN fares Phone-only fares on this route — call free
Flight time details
5,379 miles nonstop takes roughly 11h 1m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- TRS — Trieste–Friuli Venezia Giulia Airport · Ronchi De Legionari, Italy
- OSN — Osan Air Base · Osan, South Korea
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 TRS
- POW · Portoroz Airport25 mi away
- AVB · Aviano Air Base44 mi away
- LJU · Ljubljana Jože Pučnik Airport55 mi away
- VCE · Venice Marco Polo Airport58 mi away
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
Frequently asked questions
How far is TRS from OSN?
The flight distance from Ronchi De Legionari (TRS) to Osan (OSN) is 5,379 miles (8,657 km, 4,674 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TRS to OSN?
A nonstop flight takes about 11h 1m 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 Ronchi De Legionari and Osan?
Osan is 7 hours ahead of Ronchi De Legionari.
What is the cheapest way to fly from TRS to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TRS–OSN that never appear on search engines, with no booking fees.