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BUF to OPO: distance & flight time
Buffalo (Buffalo Niagara International Airport) → Porto (Francisco de Sá Carneiro Airport)
3,485 mi
5,608 km · 3,028 nm
7h 18m
estimated nonstop flight time
+5h
time difference · heading northeast
See live BUF→OPO fares Phone-only fares on this route — call free
Flight time details
3,485 miles nonstop takes roughly 7h 18m 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
- BUF — Buffalo Niagara International Airport · Buffalo, 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 BUF
- IAG · Niagara Falls International Airport16 mi away
- YYZ · Lester B. Pearson International Airport68 mi away
- YCM · Niagara District Airport28 mi away
- DKK · Chautauqua County-Dunkirk Airport41 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 BUF from OPO?
The flight distance from Buffalo (BUF) to Porto (OPO) is 3,485 miles (5,608 km, 3,028 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BUF to OPO?
A nonstop flight takes about 7h 18m 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 Buffalo and Porto?
Porto is 5 hours ahead of Buffalo.
What is the cheapest way to fly from BUF to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BUF–OPO that never appear on search engines, with no booking fees.