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FNL to CEI: distance & flight time
Fort Collins (Northern Colorado Regional Airport) → Chiang Rai (Chiang Rai International Airport)
7,967 mi
12,821 km · 6,923 nm
16h 5m
estimated nonstop flight time
+13h
time difference · heading northwest
See live FNL→CEI fares Phone-only fares on this route — call free
Flight time details
7,967 miles nonstop takes roughly 16h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- FNL — Northern Colorado Regional Airport · Fort Collins, 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 FNL
- DEN · Denver International Airport45 mi away
- GXY · Greeley–Weld County Airport20 mi away
- WBU · Boulder Municipal Airport31 mi away
- BJC · Rocky Mountain Metropolitan Airport38 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 FNL from CEI?
The flight distance from Fort Collins (FNL) to Chiang Rai (CEI) is 7,967 miles (12,821 km, 6,923 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FNL to CEI?
A nonstop flight takes about 16h 5m 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 Fort Collins and Chiang Rai?
Chiang Rai is 13 hours ahead of Fort Collins.
What is the cheapest way to fly from FNL to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FNL–CEI that never appear on search engines, with no booking fees.