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OPO to SLD: distance & flight time
Porto (Francisco de Sá Carneiro Airport) → Sliac (Sliač Airport)
1,443 mi
2,323 km · 1,254 nm
3h 36m
estimated nonstop flight time
+1h
time difference · heading northeast
See live OPO→SLD fares Phone-only fares on this route — call free
Flight time details
1,443 miles nonstop takes roughly 3h 36m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
- SLD — Sliač Airport · Sliac, Slovakia
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 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
Near SLD
- ILZ · Žilina Airport47 mi away
- TAT · Poprad-Tatry Airport59 mi away
- PZY · Piešťany Airport60 mi away
- UHE · Kunovice Airport82 mi away
Frequently asked questions
How far is OPO from SLD?
The flight distance from Porto (OPO) to Sliac (SLD) is 1,443 miles (2,323 km, 1,254 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OPO to SLD?
A nonstop flight takes about 3h 36m 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 Porto and Sliac?
Sliac is 1 hour ahead of Porto.
What is the cheapest way to fly from OPO to SLD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OPO–SLD that never appear on search engines, with no booking fees.