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AST to USN: distance & flight time
Astoria (Astoria Regional Airport) → Ulsan (Ulsan Airport)
5,188 mi
8,350 km · 4,509 nm
10h 38m
estimated nonstop flight time
+16h
time difference · heading northwest
See live AST→USN fares Phone-only fares on this route — call free
Flight time details
5,188 miles nonstop takes roughly 10h 38m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time gain when reading arrival times on your ticket.
The two airports
- AST — Astoria Regional Airport · Astoria, United States
- USN — Ulsan Airport · Ulsan, 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 AST
- KLS · Southwest Washington Regional Airport47 mi away
- OTK · Tillamook Airport51 mi away
- HQM · Bowerman Airport56 mi away
- CLS · Chehalis Centralia Airport56 mi away
Near USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is AST from USN?
The flight distance from Astoria (AST) to Ulsan (USN) is 5,188 miles (8,350 km, 4,509 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from AST to USN?
A nonstop flight takes about 10h 38m 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 Astoria and Ulsan?
Ulsan is 16 hours ahead of Astoria.
What is the cheapest way to fly from AST to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on AST–USN that never appear on search engines, with no booking fees.