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DUC to SEP: distance & flight time
Duncan (Halliburton Field) → Stephenville (Stephenville Clark Regional Airport)
156 mi
252 km · 136 nm
53m
estimated nonstop flight time
Same time
time difference · heading south
See live DUC→SEP fares Phone-only fares on this route — call free
Flight time details
156 miles nonstop takes roughly 53m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- DUC — Halliburton Field · Duncan, United States
- SEP — Stephenville Clark Regional Airport · Stephenville, 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 SEP
- MWL · Mineral Wells Airport40 mi away
- DFW · Dallas Fort Worth International Airport81 mi away
- BKD · Stephens County Airport54 mi away
- FWH · NAS Fort Worth JRB/Carswell Field57 mi away
Frequently asked questions
How far is DUC from SEP?
The flight distance from Duncan (DUC) to Stephenville (SEP) is 156 miles (252 km, 136 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DUC to SEP?
A nonstop flight takes about 53m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from DUC to SEP?
Nonstop service on DUC–SEP depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 53m nonstop estimate.
What is the cheapest way to fly from DUC to SEP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DUC–SEP that never appear on search engines, with no booking fees.
Why are some DUC to SEP fares phone-only?
Consolidator contracts let us sell certain DUC–SEP tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.