Need help booking?
Unpublished phone-only deals available
PSM to OSN: distance & flight time
Portsmouth (Portsmouth International at Pease Airport) → Osan (Osan Air Base)
6,785 mi
10,920 km · 5,896 nm
13h 46m
estimated nonstop flight time
+13h
time difference · heading north
See live PSM→OSN fares Phone-only fares on this route — call free
Flight time details
6,785 miles nonstop takes roughly 13h 46m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- PSM — Portsmouth International at Pease Airport · Portsmouth, United States
- 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 PSM
- BOS · General Edward Lawrence Logan International Airport50 mi away
- LWM · Lawrence Municipal Airport29 mi away
- MHT · Manchester-Boston Regional Airport33 mi away
- BVY · Beverly Municipal Airport34 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 PSM from OSN?
The flight distance from Portsmouth (PSM) to Osan (OSN) is 6,785 miles (10,920 km, 5,896 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PSM to OSN?
A nonstop flight takes about 13h 46m 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 Portsmouth and Osan?
Osan is 13 hours ahead of Portsmouth.
What is the cheapest way to fly from PSM to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PSM–OSN that never appear on search engines, with no booking fees.