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FSI to SEP: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Stephenville (Stephenville Clark Regional Airport)
169 mi
272 km · 147 nm
55m
estimated nonstop flight time
Same time
time difference · heading south
See live FSI→SEP fares Phone-only fares on this route — call free
Flight time details
169 miles nonstop takes roughly 55m 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
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
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 FSI from SEP?
The flight distance from Fort Sill (FSI) to Stephenville (SEP) is 169 miles (272 km, 147 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to SEP?
A nonstop flight takes about 55m 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 FSI to SEP?
Nonstop service on FSI–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 55m nonstop estimate.
What is the cheapest way to fly from FSI to SEP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–SEP that never appear on search engines, with no booking fees.
Why are some FSI to SEP fares phone-only?
Consolidator contracts let us sell certain FSI–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.