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SPF to GFK: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Grand Forks (Grand Forks International Airport)
396 mi
638 km · 344 nm
1h 31m
estimated nonstop flight time
+1h
time difference · heading northeast
See live SPF→GFK fares Phone-only fares on this route — call free
Flight time details
396 miles nonstop takes roughly 1h 31m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-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
- GFK — Grand Forks International Airport · Grand Forks, 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 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 GFK
- RDR · Grand Forks Air Force Base10 mi away
- TVF · Thief River Falls Regional Airport47 mi away
- PMB · Pembina Municipal Airport69 mi away
- FAR · Hector International Airport73 mi away
Frequently asked questions
How far is SPF from GFK?
The flight distance from Spearfish-South Dakota (SPF) to Grand Forks (GFK) is 396 miles (638 km, 344 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to GFK?
A nonstop flight takes about 1h 31m 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 Grand Forks?
Grand Forks is 1 hour ahead of Spearfish-South Dakota.
What is the cheapest way to fly from SPF to GFK?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–GFK that never appear on search engines, with no booking fees.