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Did you mean flights from Porto to Green Bay?
United States
Austin Straubel International Airport
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Portugal
Francisco Sá Carneiro Airport
At present, there are no direct flights from Green Bay to Porto.
However, there are several flights from GRB to OPO with a stopover.
Select a stopover airport from the list below to see which airlines operate flights from GRB to OPO, and to see what flight schedules are available.
In Porto, the summers are known for being warm, long, and dry, with temperatures typically reaching about 30°C (86°F). The area’s breathtaking scenery complements the sun-filled lifestyle, making it a popular destination for visitors all year round who are looking for relaxation, fun by the water, and the beauty of the outdoors.
Porto is best explored from mid-spring to summer, specifically between April and September, as most rainfall occurs from October to February.

Currently, there is only one airline that covers the full route (with 1 stopover) from Green Bay GRB to Porto OPO, which is United Airlines.
All other flights from Green Bay to Porto are operated by a combination of multiple carriers, which are listed below:
Star Alliance is the only alliance that covers the full route (with 1 stopover) from Green Bay GRB to Porto OPO.
You can fly the full journey from GRB to OPO in either Economy or Business Class. Premium Economy and First Class are not available on this route, at least not on the full route with just 1 stopover.
However, for the first part of this route, Economy and Business Class are available. This depends on the stopover airport of your choice though.
Again depending on your stopover airport, available classes for the second part of this route are Economy, Premium Economy and Business Class.
At this moment, it is not possible to cover the full route from Green Bay to Porto (with 1 stopover) with one specific type of aircraft. All flights from Green Bay to Porto are operated by a combination of multiple aircraft types.
The distance between Green Bay and Porto is 3,869 miles (6,226 kilometers).
However, because there are no direct flights between GRB and OPO, the distance of the full journey varies between 4,084 and 4,003 miles (or 6,573 and 6,442 kilometers), depending on your stopover airport.
Flights from Green Bay to Porto take from 8 hours and 56 minutes up to 9 hours and 10 minutes, depending on your stopover airport.
Please note that these times refer to the actual flight times, excluding the stopover time in between connecting flights, as this depends on your stopover airport as well as your date(s) of travel.
There is 1 airport in Porto: Francisco Sá Carneiro Airport (OPO).
From 8 hours and 56 minutes up to 9 hours and 10 minutes, depending on your stopover airport.
Note that this excludes the layover time in between connecting flights.
Because there are no direct flights between GRB and OPO, the total distance of the full journey varies between 4,084 and 4,003 miles (or 6,573 and 6,442 kilometers), depending on your stopover airport.
United Airlines is the only airline flying the full route from Green Bay to Porto.
TAP Portugal and Delta operate several connecting flights, but only partly.
Star Alliance is currently the only alliance flying from Green Bay to Porto.
You can fly the full route from Green Bay to Porto (with 1 stopover) in Economy and Business Class.
There is no specific aircraft type that covers the full route (with 1 stopover) from Green Bay to Porto at this moment.
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