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CEI to SEP: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Stephenville (Stephenville Clark Regional Airport)
8,640 mi
13,904 km · 7,508 nm
17h 24m
estimated nonstop flight time
-12h
time difference · heading north
See live CEI→SEP fares Phone-only fares on this route — call free
Flight time details
8,640 miles nonstop takes roughly 17h 24m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time set-back when reading arrival times on your ticket.
The two airports
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- SEP — Stephenville Clark Regional Airport · Stephenville, 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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 mi away
Near SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 mi away
Frequently asked questions
How far is CEI from SEP?
The flight distance from Chiang Rai (CEI) to Stephenville (SEP) is 8,640 miles (13,904 km, 7,508 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CEI to SEP?
A nonstop flight takes about 17h 24m 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 Stephenville?
Stephenville is 12 hours behind Chiang Rai.
What is the cheapest way to fly from CEI to SEP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–SEP that never appear on search engines, with no booking fees.