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SEP to ACI: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Alderney (Alderney Airport)
4,804 mi
7,731 km · 4,174 nm
9h 53m
estimated nonstop flight time
+6h
time difference · heading northeast
See live SEP→ACI fares Phone-only fares on this route — call free
Flight time details
4,804 miles nonstop takes roughly 9h 53m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- SEP — Stephenville Clark Regional Airport · Stephenville, United States
- ACI — Alderney Airport · Alderney, Guernsey
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 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
Near ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 mi away
Frequently asked questions
How far is SEP from ACI?
The flight distance from Stephenville (SEP) to Alderney (ACI) is 4,804 miles (7,731 km, 4,174 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to ACI?
A nonstop flight takes about 9h 53m 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 Stephenville and Alderney?
Alderney is 6 hours ahead of Stephenville.
What is the cheapest way to fly from SEP to ACI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–ACI that never appear on search engines, with no booking fees.