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Portugal

$792+ Cheap flights from Green Bay (GRB) to Portugal

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — LIS
Jul 14 — Jul 211
Tue 7/14
Tue 7/21
1 adult, Economy
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Cheap flight deals from Green Bay to Portugal

Cheapest flights from Green Bay to Portugal
Explore the most affordable flight options available from Green Bay to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 14, 2026.

This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:30 am
GRB
-
LIS
2 stops19h 40m
United Airlines
Thu 12/1012:25 pm
LIS
-
GRB
2 stops17h 54m
United Airlines
Deal found 6/9$792
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/178:03 am
GRB
-
LIS
2 stops18h 17m
United Airlines
Tue 6/236:45 am
LIS
-
GRB
2 stops18h 26m
United Airlines
Deal found 6/11$1,559

Find flight deals from Green Bay to Portugal

Keep the following information in mind while searching for Green Bay to Portugal flight deals. Data was last updated June 14, 2026.

Round-trip from

$792
(United Airlines)
From Green Bay Austin-Straubel to Portugal
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Green Bay to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 14, 2026.
Use the filters below to find and compare flights from Green Bay to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Mon 12/7

6:30 am-8:10 am

2 stops19h 40m

Lisbon Humberto Delgado

Thu 12/10

12:25 pm-12:19 am

2 stops17h 54m

$792
Cheapest one-way
Quickest one-way

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Tue 7/14

9:51 am-5:55 pm

2 stops26h 04m

$1,088

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Tue 7/14

5:47 pm-9:35 am

3 stops57h 48m

$2,486

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Sorted by cheapest first

Best time to book a flight from Green Bay to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Green Bay with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Green Bay to Portugal
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated June 14, 2026.
Peruse reviews from past customers who have flown with United Airlines from Green Bay to Portugal to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,818 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,818 reviews
United Airlines
7.4
Good
9,818 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Boarding

7.7

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

Find useful and relevant information for your journey from Green Bay to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Green Bay to Portugal?

    For a flight from Green Bay to Portugal, you will be flying from Austin-Straubel. Green Bay Austin-Straubel (GRB) is just 5.9 mi from the center of the city.

  • How long is the flight from Green Bay to Portugal?

    Departing from Green Bay to Portugal will take you 19h 40m. The distance between Green Bay and Portugal is about 3934 mi.

  • Can I find deals for flights from Green Bay to Portugal that include hotel bookings?

    Yes. In addition to deals on Green Bay to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Green Bay to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Green Bay to Portugal.

  • Can I find deals for business class flights from Green Bay to Portugal?

    Yes. Cheapflights offers flight deals from Green Bay to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Green Bay to Portugal

Discover the top airline that operate flights from Green Bay to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$545Average$904FlexibilityNo cancel feeOn-time69%

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