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KOP to OSN: distance & flight time
Nakhon Phanom (Nakhon Phanom Airport) → Osan (Osan Air Base)
1,925 mi
3,098 km · 1,673 nm
4h 14m
estimated nonstop flight time
+2h
time difference · heading northeast
See live KOP→OSN fares Phone-only fares on this route — call free
Flight time details
1,925 miles nonstop takes roughly 4h 14m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- KOP — Nakhon Phanom Airport · Nakhon Phanom, Thailand
- OSN — Osan Air Base · Osan, South Korea
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 KOP
- SNO · Sakon Nakhon Airport37 mi away
- ZVK · Savannakhet Airport58 mi away
- ROI · Roi Et Airport105 mi away
- VII · Vinh Airport115 mi away
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
Frequently asked questions
How far is KOP from OSN?
The flight distance from Nakhon Phanom (KOP) to Osan (OSN) is 1,925 miles (3,098 km, 1,673 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KOP to OSN?
A nonstop flight takes about 4h 14m 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 Nakhon Phanom and Osan?
Osan is 2 hours ahead of Nakhon Phanom.
What is the cheapest way to fly from KOP to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KOP–OSN that never appear on search engines, with no booking fees.