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OSN to CEI: distance & flight time
Osan (Osan Air Base) → Chiang Rai (Chiang Rai International Airport)
2,017 mi
3,246 km · 1,753 nm
4h 25m
estimated nonstop flight time
-2h
time difference · heading southwest
See live OSN→CEI fares Phone-only fares on this route — call free
Flight time details
2,017 miles nonstop takes roughly 4h 25m gate to gate, flying southwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 mi away
Frequently asked questions
How far is OSN from CEI?
The flight distance from Osan (OSN) to Chiang Rai (CEI) is 2,017 miles (3,246 km, 1,753 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to CEI?
A nonstop flight takes about 4h 25m 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 Chiang Rai?
Chiang Rai is 2 hours behind Osan.
What is the cheapest way to fly from OSN to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–CEI that never appear on search engines, with no booking fees.