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SEP to OPO: distance & flight time
Stephenville (Stephenville Clark Regional Airport) → Porto (Francisco de Sá Carneiro Airport)
4,773 mi
7,681 km · 4,148 nm
9h 50m
estimated nonstop flight time
+6h
time difference · heading northeast
See live SEP→OPO fares Phone-only fares on this route — call free
Flight time details
4,773 miles nonstop takes roughly 9h 50m 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
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
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 OPO
- BGZ · Braga Municipal Aerodrome26 mi away
- VRL · Vila Real Airport50 mi away
- VSE · Aerodromo Goncalves Lobato (Viseu Airport)55 mi away
- VGO · Vigo Airport68 mi away
Frequently asked questions
How far is SEP from OPO?
The flight distance from Stephenville (SEP) to Porto (OPO) is 4,773 miles (7,681 km, 4,148 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEP to OPO?
A nonstop flight takes about 9h 50m 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 Porto?
Porto is 6 hours ahead of Stephenville.
What is the cheapest way to fly from SEP to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEP–OPO that never appear on search engines, with no booking fees.