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Portugal

$790+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
GRB — LIS
May 29 — Jun 51
Fri 5/29
Fri 6/5
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 April 29, 2026.

This United Airlines deal was found by Cheapflights users on 4/27. 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.
Sun 12/61:11 pm
GRB
-
LIS
2 stops12h 59m
United Airlines
Wed 12/91:00 pm
LIS
-
GRB
2 stops29h 05m
United Airlines
Deal found 4/27$790
This United Airlines deal was found by Cheapflights users on 4/26. 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.
Thu 10/151:11 pm
GRB
-
LIS
2 stops18h 29m
United Airlines
Tue 11/31:00 pm
LIS
-
GRB
2 stops29h 05m
United Airlines
Deal found 4/26$843
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 10/188:25 am
GRB
-
LIS
2 stops20h 05m
United Airlines
Thu 10/225:05 am
LIS
-
GRB
2 stops20h 00m
United Airlines
Deal found 4/28$909
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 10/158:25 am
GRB
-
LIS
2 stops20h 05m
United Airlines
Thu 10/225:05 am
LIS
-
GRB
2 stops25h 14m
United Airlines
Deal found 4/28$917
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 10/181:11 pm
GRB
-
LIS
2 stops15h 19m
United Airlines
Fri 10/2312:20 pm
LIS
-
GRB
2 stops16h 29m
United Airlines
Deal found 4/28$920
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Thu 10/158:25 am
GRB
-
LIS
2 stops20h 05m
United Airlines
Fri 10/2312:20 pm
LIS
-
GRB
2 stops17h 59m
United Airlines
Deal found 4/28$928
This United Airlines deal was found by Cheapflights users on 4/28. 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 10/141:11 pm
GRB
-
LIS
2 stops15h 19m
United Airlines
Thu 10/225:05 am
LIS
-
GRB
2 stops25h 14m
United Airlines
Deal found 4/28$935
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 10/188:25 am
GRB
-
LIS
2 stops20h 05m
United Airlines
Mon 10/2611:55 am
LIS
-
GRB
2 stops27h 35m
United Airlines
Deal found 4/28$938
This KAYAK deal was found by Cheapflights users on 4/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:25 pm
GRB
-
LIS
2 stops19h 50m
Lufthansa
Mon 10/263:45 pm
LIS
-
GRB
2 stops37h 34m
Lufthansa
Deal found 4/28$945
This United Airlines deal was found by Cheapflights users on 4/28. 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 10/141:11 pm
GRB
-
LIS
2 stops15h 19m
United Airlines
Fri 10/2312:20 pm
LIS
-
GRB
2 stops17h 59m
United Airlines
Deal found 4/28$946
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 10/181:11 pm
GRB
-
LIS
2 stops15h 19m
United Airlines
Sun 10/251:00 pm
LIS
-
GRB
2 stops26h 30m
United Airlines
Deal found 4/28$952
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sat 10/171:11 pm
GRB
-
LIS
2 stops15h 24m
United Airlines
Thu 10/225:05 am
LIS
-
GRB
2 stops23h 44m
United Airlines
Deal found 4/28$959

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 April 29, 2026.

Round-trip from

$843
(United Airlines)

Popular in

September

Cheapest in

March

Average price

$877
From Green Bay Austin-Straubel to Portugal
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 29, 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

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Thu 10/15

1:11 pm-1:40 pm

2 stops18h 29m

Lisbon Humberto Delgado

Tue 11/3

1:00 pm-12:05 pm

2 stops29h 05m

$843
Quickest round-trip

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Sun 10/18

1:11 pm-10:30 am

2 stops15h 19m

Lisbon Humberto Delgado

Fri 10/23

12:20 pm-10:49 pm

2 stops16h 29m

$920

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Thu 10/15

8:25 am-10:30 am

2 stops20h 05m

Lisbon Humberto Delgado

Fri 10/23

12:20 pm-12:19 am

2 stops17h 59m

$928

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Sun 10/18

8:25 am-10:30 am

2 stops20h 05m

Lisbon Humberto Delgado

Mon 10/26

11:55 am-10:30 am

2 stops27h 35m

$938

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Wed 10/14

1:11 pm-10:30 am

2 stops15h 19m

Lisbon Humberto Delgado

Fri 10/23

12:20 pm-12:19 am

2 stops17h 59m

$946

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Sun 10/18

1:11 pm-10:30 am

2 stops15h 19m

Lisbon Humberto Delgado

Sun 10/25

1:00 pm-10:30 am

2 stops26h 30m

$952

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Fri 10/16

1:11 pm-11:45 am

2 stops16h 34m

Lisbon Humberto Delgado

Thu 10/22

5:05 am-7:05 pm

2 stops20h 00m

$1,051

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Thu 10/8

1:11 pm-9:20 am

2 stops14h 09m

Lisbon Humberto Delgado

Sat 10/17

6:15 am-1:55 pm

2 stops37h 40m

$1,065

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Wed 6/10

2:35 pm-10:45 pm

2 stops26h 10m

Lisbon Humberto Delgado

Wed 6/17

11:25 am-3:09 pm

2 stops33h 44m

$1,402

Green BayLisbon

GRB - LIS

GRBLIS

Green Bay Austin-Straubel

Thu 10/8

8:10 pm-8:10 am

1 stop30h 00m

Lisbon Humberto Delgado

Sat 10/17

12:40 pm-7:48 pm

1 stop13h 08m

$1,778

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 April 29, 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
9,680 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,680 reviews
United Airlines
7.4
Good
9,680 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 18h 29m. 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 April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$545Average$904FlexibilityNo cancel feeOn-time69%

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