$974 Find Cheap Flights from Green Bay to Portugal - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Green Bay to Portugal departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Green Bay to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Green Bay to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Green Bay to Portugal

Wed, Sep 16 - Tue, Sep 29
United Airlines Logo
6:25 am - 9:20 am
GRB
-
LIS
20h 55m
2 stops
United Airlines Logo
5:05 am - 7:48 pm
LIS
-
GRB
20h 43m
2 stops
$974United Airlines
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
9:03 am - 10:30 am
GRB
-
LIS
19h 27m
2 stops
United Airlines Logo
7:25 am - 11:19 pm
LIS
-
GRB
21h 54m
2 stops
$1,045United Airlines
Wed, Sep 16 - Tue, Sep 29
Multiple Airlines Logo
12:02 pm - 9:35 am
GRB
-
LIS
15h 33m
2 stops
Multiple Airlines Logo
5:40 pm - 8:32 pm
LIS
-
GRB
32h 52m
3 stops
$1,598Multiple Airlines
Wed, Sep 16 - Tue, Sep 29
Multiple Airlines Logo
12:02 pm - 1:05 pm
GRB
-
LIS
19h 03m
3 stops
Multiple Airlines Logo
5:40 pm - 8:32 pm
LIS
-
GRB
32h 52m
3 stops
$1,649Multiple Airlines
Thu, Sep 10 - Thu, Sep 17
Multiple Airlines Logo
5:43 am - 8:10 am
GRB
-
LIS
20h 27m
1 stop
Multiple Airlines Logo
9:15 am - 12:13 am
LIS
-
GRB
20h 58m
1 stop
$1,800Multiple Airlines
Booking Insights

KAYAK's insights & trends for Green Bay to Portugal flights

Get data-powered insights and trends into flights from Green Bay to Portugal to help you find the cheapest flights, the best time to fly and much more.

How long does a flight from Green Bay to Portugal take?

The duration of a flight to Portugal depends on your arrival airport. The shortest route to Portugal from Green Bay is to Lisbon, which takes 19h 27m.

Good to know

Cheapest flight

$974
Flight from Green Bay to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Green Bay to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Green Bay to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Green Bay to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Green Bay to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Green Bay to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Green Bay to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Green Bay to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Green Bay to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Green Bay to Portugal

 
Need help choosing which airline to fly with from Green Bay to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10053 reviews
8.1Crew
7.3Comfort
7.7Boarding
7.1Entertainment
6.6Food
Airline reviews

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

8.0 ExcellentArmedrest, Jul 2026
ORD - PAH
Read more United Airlines reviews

It was hot and not as comfortable as the flight to Chicago. Must have been a different plane that needs to be worked on or replaced.

Improve the food offerings and cabin seating. My wife would prefer to fly another airline, even with a connection for a more comfortable trip. A 737-8 should not be scheduled for a 6 hour segment, which turned into 7.5 hours due to the origin ground delay.

OK, I don’t expect much from coach class. Everything basically is pretty lousy. But at least I expect my bloody luggage to get from A to B. Tap Airlines lost my luggage and it has been more than 24 hours in Lisbon and they still have not located my luggage. On top of that, they are incredibly unhelpful. They feel actually dismissive. This lousy customer service.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

The seats on the aircraft are like sitting in a rock. During the boarding process they recognize Active Duty Military, why don’t they recognize Retired Military. I’ve always preferred Delta, this flight confirmed why I still prefer Delta.

It was literally one of the worst travel experiences ever. My flight got delayed by over an hour and there was no communication of this from the gate staff. I realized it by checking the screen periodically. Once on board the flight attendants continued to serve alcohol to a man who was clearly already drunk and that was making a bunch of commotion. Never again will I fly United!

At least the delays were short. Business class, even in the new planes is very crowded now with crappy tray tables

All good except paid for wifi that did not work

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

Everything you need to know for your flight from Green Bay to Portugal

Information on your arrival and departure airports