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SLU to OPO: distance & flight time
Castries (George F. L. Charles Airport) → Porto (Francisco de Sá Carneiro Airport)
3,643 mi
5,862 km · 3,165 nm
7h 37m
estimated nonstop flight time
+5h
time difference · heading northeast
See live SLU→OPO fares Phone-only fares on this route — call free
Flight time details
3,643 miles nonstop takes roughly 7h 37m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 5-hour time gain when reading arrival times on your ticket.
The two airports
- SLU — George F. L. Charles Airport · Castries, Saint Lucia
- 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 SLU
- UVF · Hewanorra International Airport20 mi away
- FDF · Martinique Aimé Césaire International Airport39 mi away
- SVD · Argyle International Airport61 mi away
- BQU · J F Mitchell Airport74 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 SLU from OPO?
The flight distance from Castries (SLU) to Porto (OPO) is 3,643 miles (5,862 km, 3,165 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SLU to OPO?
A nonstop flight takes about 7h 37m 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 Castries and Porto?
Porto is 5 hours ahead of Castries.
What is the cheapest way to fly from SLU to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SLU–OPO that never appear on search engines, with no booking fees.