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SEP to ROI: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Roi Et (Roi Et Airport)
8,795 mi
14,154 km · 7,643 nm
17h 43m
estimated nonstop flight time
+12h
time difference · heading northwest
See live SEP→ROI fares Phone-only fares on this route — call free
Flight time details
8,795 miles nonstop takes roughly 17h 43m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- SEP — Stephenville Clark Regional Airport · Stephenville, United States
- ROI — Roi Et Airport · Roi Et, Thailand
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 ROI
- KKC · Khon Kaen Airport70 mi away
- BFV · Buri Ram Airport70 mi away
- ZVK · Savannakhet Airport72 mi away
- SNO · Sakon Nakhon Airport78 mi away
Frequently asked questions
How far is SEP from ROI?
The flight distance from Stephenville (SEP) to Roi Et (ROI) is 8,795 miles (14,154 km, 7,643 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to ROI?
A nonstop flight takes about 17h 43m 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 Roi Et?
Roi Et is 12 hours ahead of Stephenville.
What is the cheapest way to fly from SEP to ROI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–ROI that never appear on search engines, with no booking fees.