Need help booking?
Unpublished phone-only deals available
CNX to SPF: distance & flight time
Chiang Mai (Chiang Mai International Airport) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
7,837 mi
12,613 km · 6,810 nm
15h 50m
estimated nonstop flight time
-13h
time difference · heading north
See live CNX→SPF fares Phone-only fares on this route — call free
Flight time details
7,837 miles nonstop takes roughly 15h 50m 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
- CNX — Chiang Mai International Airport · Chiang Mai, Thailand
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 CNX
- LPT · Lampang Airport49 mi away
- PYY · Mae Hong Son Airport54 mi away
- HGN · Mae Hong Son Airport74 mi away
- PRH · Phrae Airport90 mi away
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
Frequently asked questions
How far is CNX from SPF?
The flight distance from Chiang Mai (CNX) to Spearfish-South Dakota (SPF) is 7,837 miles (12,613 km, 6,810 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CNX to SPF?
A nonstop flight takes about 15h 50m 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 Mai and Spearfish-South Dakota?
Spearfish-South Dakota is 13 hours behind Chiang Mai.
What is the cheapest way to fly from CNX to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CNX–SPF that never appear on search engines, with no booking fees.