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HPH to OSN: distance & flight time
Haiphong (Cat Bi International Airport) → Osan (Osan Air Base)
1,658 mi
2,668 km · 1,440 nm
3h 43m
estimated nonstop flight time
+2h
time difference · heading northeast
See live HPH→OSN fares Phone-only fares on this route — call free
Flight time details
1,658 miles nonstop takes roughly 3h 43m 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
- HPH — Cat Bi International Airport · Haiphong, Vietnam
- 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 HPH
- HAN · Noi Bai International Airport65 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 HPH from OSN?
The flight distance from Haiphong (HPH) to Osan (OSN) is 1,658 miles (2,668 km, 1,440 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HPH to OSN?
A nonstop flight takes about 3h 43m 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 Haiphong and Osan?
Osan is 2 hours ahead of Haiphong.
What is the cheapest way to fly from HPH to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HPH–OSN that never appear on search engines, with no booking fees.