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MFI to OPO: distance & flight time
Marshfield (Marshfield Municipal Airport) → Porto (Francisco de Sá Carneiro Airport)
3,950 mi
6,356 km · 3,432 nm
8h 13m
estimated nonstop flight time
+6h
time difference · heading northeast
See live MFI→OPO fares Phone-only fares on this route — call free
Flight time details
3,950 miles nonstop takes roughly 8h 13m 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
- MFI — Marshfield Municipal Airport · Marshfield, 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 MFI
- ISW · Alexander Field South Wood County Airport26 mi away
- CWA · Central Wisconsin Airport27 mi away
- STE · Stevens Point Municipal Airport33 mi away
- AUW · Wausau Downtown Airport34 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 MFI from OPO?
The flight distance from Marshfield (MFI) to Porto (OPO) is 3,950 miles (6,356 km, 3,432 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from MFI to OPO?
A nonstop flight takes about 8h 13m 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 Marshfield and Porto?
Porto is 6 hours ahead of Marshfield.
What is the cheapest way to fly from MFI to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on MFI–OPO that never appear on search engines, with no booking fees.