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GRF to DUC: distance & flight time
Fort Lewis (Gray Army Air Field) → Duncan (Halliburton Field)
1,545 mi
2,486 km · 1,342 nm
3h 30m
estimated nonstop flight time
+2h
time difference · heading southeast
See live GRF→DUC fares Phone-only fares on this route — call free
Flight time details
1,545 miles nonstop takes roughly 3h 30m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- GRF — Gray Army Air Field · Fort Lewis, United States
- DUC — Halliburton Field · Duncan, 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 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
Near DUC
Frequently asked questions
How far is GRF from DUC?
The flight distance from Fort Lewis (GRF) to Duncan (DUC) is 1,545 miles (2,486 km, 1,342 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRF to DUC?
A nonstop flight takes about 3h 30m 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 Fort Lewis and Duncan?
Duncan is 2 hours ahead of Fort Lewis.
What is the cheapest way to fly from GRF to DUC?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRF–DUC that never appear on search engines, with no booking fees.