Need help booking?
Unpublished phone-only deals available
CEI to CPR: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Casper (Casper-Natrona County International Airport)
7,781 mi
12,523 km · 6,762 nm
15h 43m
estimated nonstop flight time
-13h
time difference · heading north
See live CEI→CPR fares Phone-only fares on this route — call free
Flight time details
7,781 miles nonstop takes roughly 15h 43m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time set-back when reading arrival times on your ticket.
The two airports
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- CPR — Casper-Natrona County International Airport · Casper, 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 CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal Airport104 mi away
Frequently asked questions
How far is CEI from CPR?
The flight distance from Chiang Rai (CEI) to Casper (CPR) is 7,781 miles (12,523 km, 6,762 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CEI to CPR?
A nonstop flight takes about 15h 43m 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 Casper?
Casper is 13 hours behind Chiang Rai.
What is the cheapest way to fly from CEI to CPR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–CPR that never appear on search engines, with no booking fees.