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APA to CEI: distance & flight time
Denver (Centennial Airport) → Chiang Rai (Chiang Rai International Airport)
8,025 mi
12,915 km · 6,974 nm
16h 12m
estimated nonstop flight time
+13h
time difference · heading northwest
See live APA→CEI fares Phone-only fares on this route — call free
Flight time details
8,025 miles nonstop takes roughly 16h 12m 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
- APA — Centennial Airport · Denver, 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 APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal 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 APA from CEI?
The flight distance from Denver (APA) to Chiang Rai (CEI) is 8,025 miles (12,915 km, 6,974 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from APA to CEI?
A nonstop flight takes about 16h 12m 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 Denver and Chiang Rai?
Chiang Rai is 13 hours ahead of Denver.
What is the cheapest way to fly from APA to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on APA–CEI that never appear on search engines, with no booking fees.