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OSN to TRS: distance & flight time
Osan (Osan Air Base) → Ronchi De Legionari (Trieste–Friuli Venezia Giulia Airport)
5,379 mi
8,657 km · 4,674 nm
11h 1m
estimated nonstop flight time
-7h
time difference · heading northwest
See live OSN→TRS fares Phone-only fares on this route — call free
Flight time details
5,379 miles nonstop takes roughly 11h 1m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- TRS — Trieste–Friuli Venezia Giulia Airport · Ronchi De Legionari, Italy
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 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
Frequently asked questions
How far is OSN from TRS?
The flight distance from Osan (OSN) to Ronchi De Legionari (TRS) 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 OSN to TRS?
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 Osan and Ronchi De Legionari?
Ronchi De Legionari is 7 hours behind Osan.
What is the cheapest way to fly from OSN to TRS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–TRS that never appear on search engines, with no booking fees.