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Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–HPH that never appear on search engines, with no booking fees.