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OSN to CMB: distance & flight time
Osan (Osan Air Base) → Colombo (Bandaranaike International Colombo Airport)
3,603 mi
5,798 km · 3,131 nm
7h 32m
estimated nonstop flight time
-3.5h
time difference · heading southwest
See live OSN→CMB fares Phone-only fares on this route — call free
Flight time details
3,603 miles nonstop takes roughly 7h 32m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.5-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- CMB — Bandaranaike International Colombo Airport · Colombo, Sri Lanka
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 CMB
- RML · Colombo Ratmalana Airport25 mi away
- GIU · Sigiriya Air Force Base79 mi away
- ACJ · Anuradhapura Air Force Base86 mi away
- KCT · Koggala Airport87 mi away
Frequently asked questions
How far is OSN from CMB?
The flight distance from Osan (OSN) to Colombo (CMB) is 3,603 miles (5,798 km, 3,131 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to CMB?
A nonstop flight takes about 7h 32m 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 Colombo?
Colombo is 3.5 hours behind Osan.
What is the cheapest way to fly from OSN to CMB?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–CMB that never appear on search engines, with no booking fees.