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ALN to CEI: distance & flight time
Alton/St Louis (St Louis Regional Airport) → Chiang Rai (Chiang Rai International Airport)
8,321 mi
13,391 km · 7,230 nm
16h 47m
estimated nonstop flight time
—
time difference · heading north
See live ALN→CEI fares Phone-only fares on this route — call free
Flight time details
8,321 miles nonstop takes roughly 16h 47m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- ALN — St Louis Regional Airport · Alton/St Louis, United States
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
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 ALN
- STL · St Louis Lambert International Airport20 mi away
- BLV · Scott AFB/Midamerica Airport26 mi away
- SUS · Spirit of St Louis Airport36 mi away
- SPI · Abraham Lincoln Capital Airport69 mi away
Near CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 mi away
Frequently asked questions
How far is ALN from CEI?
The flight distance from Alton/St Louis (ALN) to Chiang Rai (CEI) is 8,321 miles (13,391 km, 7,230 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ALN to CEI?
A nonstop flight takes about 16h 47m 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 cheapest way to fly from ALN to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ALN–CEI that never appear on search engines, with no booking fees.