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OSN to SAY: distance & flight time
Osan (Osan Air Base) → Siena (Siena-Ampugnano Airport)
5,580 mi
8,980 km · 4,849 nm
11h 24m
estimated nonstop flight time
-7h
time difference · heading northwest
See live OSN→SAY fares Phone-only fares on this route — call free
Flight time details
5,580 miles nonstop takes roughly 11h 24m 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
- SAY — Siena-Ampugnano Airport · Siena, 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 SAY
- GRS · Grosseto Air Base36 mi away
- FLR · Peretola Airport38 mi away
- PSA · Pisa International Airport52 mi away
- EBA · Marina Di Campo Airport62 mi away
Frequently asked questions
How far is OSN from SAY?
The flight distance from Osan (OSN) to Siena (SAY) is 5,580 miles (8,980 km, 4,849 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to SAY?
A nonstop flight takes about 11h 24m 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 Siena?
Siena is 7 hours behind Osan.
What is the cheapest way to fly from OSN to SAY?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–SAY that never appear on search engines, with no booking fees.