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OSN to SIN: distance & flight time
Osan (Osan Air Base) → Singapore (Singapore Changi Airport)
2,873 mi
4,623 km · 2,496 nm
6h 6m
estimated nonstop flight time
-1h
time difference · heading southwest
See live OSN→SIN fares Phone-only fares on this route — call free
Flight time details
2,873 miles nonstop takes roughly 6h 6m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- SIN — Singapore Changi Airport · Singapore, Singapore
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 SIN
- QPG · Paya Lebar Air Base6 mi away
- XSP · Seletar Airport10 mi away
- BTH · Hang Nadim International Airport18 mi away
- TGA · Tengah Air Base20 mi away
Frequently asked questions
How far is OSN from SIN?
The flight distance from Osan (OSN) to Singapore (SIN) is 2,873 miles (4,623 km, 2,496 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to SIN?
A nonstop flight takes about 6h 6m 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 Singapore?
Singapore is 1 hour behind Osan.
What is the cheapest way to fly from OSN to SIN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–SIN that never appear on search engines, with no booking fees.