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SPF to GRF: distance & flight time
Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field) → Fort Lewis (Gray Army Air Field)
921 mi
1,482 km · 800 nm
2h 28m
estimated nonstop flight time
-1h
time difference · heading west
See live SPF→GRF fares Phone-only fares on this route — call free
Flight time details
921 miles nonstop takes roughly 2h 28m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, United States
- GRF — Gray Army Air Field · Fort Lewis, 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 GRF
- SEA · Seattle Tacoma International Airport29 mi away
- TCM · McChord Air Force Base6 mi away
- TIW · Tacoma Narrows Airport13 mi away
- OLM · Olympia Regional Airport17 mi away
Frequently asked questions
How far is SPF from GRF?
The flight distance from Spearfish-South Dakota (SPF) to Fort Lewis (GRF) is 921 miles (1,482 km, 800 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SPF to GRF?
A nonstop flight takes about 2h 28m 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 Fort Lewis?
Fort Lewis is 1 hour behind Spearfish-South Dakota.
What is the cheapest way to fly from SPF to GRF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SPF–GRF that never appear on search engines, with no booking fees.