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SEA to DUC: distance & flight time
Seattle (Seattle Tacoma International Airport) → Duncan (Halliburton Field)
1,544 mi
2,485 km · 1,342 nm
3h 30m
estimated nonstop flight time
+2h
time difference · heading southeast
See live SEA→DUC fares Phone-only fares on this route — call free
Flight time details
1,544 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
- SEA — Seattle Tacoma International Airport · Seattle, 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 SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Near DUC
Frequently asked questions
How far is SEA from DUC?
The flight distance from Seattle (SEA) to Duncan (DUC) is 1,544 miles (2,485 km, 1,342 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA 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 Seattle and Duncan?
Duncan is 2 hours ahead of Seattle.
What is the cheapest way to fly from SEA to DUC?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–DUC that never appear on search engines, with no booking fees.