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DUC to SEA: distance & flight time
Duncan (Halliburton Field) → Seattle (Seattle Tacoma International Airport)
1,544 mi
2,485 km · 1,342 nm
3h 30m
estimated nonstop flight time
-2h
time difference · heading northwest
See live DUC→SEA fares Phone-only fares on this route — call free
Flight time details
1,544 miles nonstop takes roughly 3h 30m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- DUC — Halliburton Field · Duncan, United States
- SEA — Seattle Tacoma International Airport · Seattle, 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 DUC
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
Frequently asked questions
How far is DUC from SEA?
The flight distance from Duncan (DUC) to Seattle (SEA) 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 DUC to SEA?
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 Duncan and Seattle?
Seattle is 2 hours behind Duncan.
What is the cheapest way to fly from DUC to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DUC–SEA that never appear on search engines, with no booking fees.