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CEI to USN: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Ulsan (Ulsan Airport)
2,088 mi
3,361 km · 1,815 nm
4h 34m
estimated nonstop flight time
+2h
time difference · heading northeast
See live CEI→USN fares Phone-only fares on this route — call free
Flight time details
2,088 miles nonstop takes roughly 4h 34m 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
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- 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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 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 CEI from USN?
The flight distance from Chiang Rai (CEI) to Ulsan (USN) is 2,088 miles (3,361 km, 1,815 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CEI to USN?
A nonstop flight takes about 4h 34m 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 Chiang Rai and Ulsan?
Ulsan is 2 hours ahead of Chiang Rai.
What is the cheapest way to fly from CEI to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–USN that never appear on search engines, with no booking fees.