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USN to AST: distance & flight time
Ulsan (Ulsan Airport) → Astoria (Astoria Regional Airport)
5,188 mi
8,350 km · 4,509 nm
10h 38m
estimated nonstop flight time
-16h
time difference · heading northeast
See live USN→AST fares Phone-only fares on this route — call free
Flight time details
5,188 miles nonstop takes roughly 10h 38m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- USN — Ulsan Airport · Ulsan, South Korea
- AST — Astoria Regional Airport · Astoria, United States
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 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
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
Frequently asked questions
How far is USN from AST?
The flight distance from Ulsan (USN) to Astoria (AST) 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 USN to AST?
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 Ulsan and Astoria?
Astoria is 16 hours behind Ulsan.
What is the cheapest way to fly from USN to AST?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USN–AST that never appear on search engines, with no booking fees.