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SPF to CEI: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Chiang Rai (Chiang Rai International Airport)
7,741 mi
12,458 km · 6,727 nm
15h 39m
estimated nonstop flight time
+13h
time difference · heading northwest
See live SPF→CEI fares Phone-only fares on this route — call free
Flight time details
7,741 miles nonstop takes roughly 15h 39m 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
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 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 SPF from CEI?
The flight distance from Spearfish-South Dakota (SPF) to Chiang Rai (CEI) is 7,741 miles (12,458 km, 6,727 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to CEI?
A nonstop flight takes about 15h 39m 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 Spearfish-South Dakota and Chiang Rai?
Chiang Rai is 13 hours ahead of Spearfish-South Dakota.
What is the cheapest way to fly from SPF to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–CEI that never appear on search engines, with no booking fees.