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OSN to ASM: distance & flight time
Osan (Osan Air Base) → Asmara (Asmara International Airport)
5,485 mi
8,827 km · 4,766 nm
11h 13m
estimated nonstop flight time
-6h
time difference · heading west
See live OSN→ASM fares Phone-only fares on this route — call free
Flight time details
5,485 miles nonstop takes roughly 11h 13m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- ASM — Asmara International Airport · Asmara, Eritrea
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 ASM
- MSW · Massawa International Airport40 mi away
- AXU · Axum Airport80 mi away
- MQX · Mekele Airport133 mi away
Frequently asked questions
How far is OSN from ASM?
The flight distance from Osan (OSN) to Asmara (ASM) is 5,485 miles (8,827 km, 4,766 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to ASM?
A nonstop flight takes about 11h 13m 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 Asmara?
Asmara is 6 hours behind Osan.
What is the cheapest way to fly from OSN to ASM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–ASM that never appear on search engines, with no booking fees.