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Portugal

$325+ Cheap flights from Milwaukee (MKE) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — LIS
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap flight deals from Milwaukee to Portugal

Cheapest flights from Milwaukee to Portugal
Explore the most affordable flight options available from Milwaukee to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 22, 2025.

This KLM deal was found by Cheapflights users on 12/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:05 pmMKE - LIS
1 stop12h 55mKLM
Fri 12/2611:25 amLIS - MKE
2 stops18h 26mKLM
Deal found 12/20$1,308
This Iberia deal was found by Cheapflights users on 12/20. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:43 amMKE - LIS
2 stops22h 07mMultiple Airlines
Fri 12/266:45 pmLIS - MKE
2 stops29h 04mMultiple Airlines
Deal found 12/20$1,361
This KLM deal was found by Cheapflights users on 12/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:05 pmMKE - LIS
1 stop12h 55mKLM
Sun 1/45:00 amLIS - MKE
2 stops21h 17mKLM
Deal found 12/21$1,523
This KLM deal was found by Cheapflights users on 12/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:05 pmMKE - LIS
1 stop12h 55mMultiple Airlines
Sun 1/45:30 amLIS - MKE
2 stops20h 13mMultiple Airlines
Deal found 12/20$1,529
This Air France deal was found by Cheapflights users on 12/20. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:25 pmMKE - LIS
2 stops15h 45mAir France
Sun 1/45:30 amLIS - MKE
2 stops20h 13mAir France
Deal found 12/20$1,914
This Ovago deal was found by Cheapflights users on 12/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2511:41 amMKE - LIS
1 stop14h 29mLufthansa
Sun 1/410:15 amLIS - MKE
1 stop12h 56mLufthansa
Deal found 12/20$4,299

Find flight deals from Milwaukee to Portugal

Keep the following information in mind while searching for Milwaukee to Portugal flight deals. Data was last updated December 22, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$485
(FlightHub)

One-way from

$325
(Iberia)

Popular in

July

Cheapest in

November

Average price

$1,405
Provider with most accurate pricing for Milwaukee-Mitchell-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Lisbon Humberto Delgado flights.
Search Deals
From Milwaukee-Mitchell to Portugal
Search Deals
One-way flight from Milwaukee-Mitchell to Portugal
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Milwaukee 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 December 22, 2025.
Use the filters below to find and compare flights from Milwaukee to Portugal that are best for you.

Fly from

Milwaukee

Fly to

Portugal

Route

Depart

Return

Price

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/10

11:00 am-9:30 am

1 stop17h 30m

Porto

Fri 3/20

6:00 am-9:50 pm

2 stops20h 50m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/9

5:51 pm-9:30 am

1 stop10h 39m

Porto

Wed 3/18

6:00 am-10:43 pm

2 stops21h 43m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/11

5:51 pm-9:30 am

1 stop10h 39m

Porto

Mon 3/16

12:30 pm-6:43 pm

2 stops35h 13m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/9

5:51 pm-9:30 am

1 stop10h 39m

Porto

Sun 3/15

12:30 pm-9:50 pm

2 stops38h 20m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/9

5:51 pm-9:30 am

1 stop10h 39m

Porto

Thu 3/19

12:30 pm-9:50 pm

2 stops38h 20m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/11

5:51 pm-9:30 am

1 stop10h 39m

Porto

Sun 3/15

12:30 pm-9:50 pm

2 stops38h 20m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 3/8

5:51 pm-9:30 am

1 stop10h 39m

Porto

Thu 3/19

6:00 am-9:50 pm

2 stops44h 50m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/9

5:51 pm-9:30 am

1 stop10h 39m

Porto

Mon 3/16

12:30 pm-9:50 pm

2 stops38h 20m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/9

5:51 pm-9:30 am

1 stop10h 39m

Porto

Wed 3/18

6:00 am-6:43 pm

2 stops17h 43m

$486

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/10

1:25 pm-9:30 am

2 stops15h 05m

Porto

Fri 3/20

6:00 am-9:50 pm

2 stops20h 50m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 38 results
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Best time to book a flight from Milwaukee to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Milwaukee 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 Milwaukee to Portugal

What is the cheapest month to book a flight from Milwaukee to Portugal?

Currently, December is the cheapest month in which you can book a flight from Milwaukee to Portugal (average of $411). Flying from Milwaukee to Portugal in June is currently the most expensive (average of $690). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MKE to PT?

Find hourly flight availability from Milwaukee to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 22, 2025.

It’s optimal to fly from Milwaukee to Portugal in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the afternoon.

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 December 22, 2025.
Read reviews from past customers who have flown Delta, KLM, and United Airlines from Milwaukee to Portugal. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,015 reviews

Crew

8.5

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,015 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,431 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,102 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,051 reviews
Delta
7.9
Good
8,015 reviews

Crew

8.5

Boarding

8.1

Food

7.3

Overall

7.9

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Milwaukee 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 Milwaukee to Portugal?

    Milwaukee-Mitchell (MKE) is the airport you will fly out of if you book a flight from Milwaukee to Portugal. It is only a 6.4 mi journey to Milwaukee-Mitchell (MKE) from Milwaukee’s city center.

  • How long is the flight from Milwaukee to Portugal?

    Airlines like Lufthansa, United Airlines, and Air Canada fly from Milwaukee to Portugal in about 10h 39m. The time it takes to get you to your destination can typically vary by up to 6h 51m. Milwaukee and Portugal are separated by a distance of 3900 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Milwaukee to Portugal?

    Most travelers choose Milwaukee-Mitchell - Lisbon Humberto Delgado, Milwaukee-Mitchell - Porto or Milwaukee-Mitchell - Ponta Delgada Nordela when deciding on the best route from Milwaukee to Portugal.

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

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

  • How can I find direct flights from Milwaukee to Portugal?

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

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

    Yes. Cheapflights offers flight deals from Milwaukee 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.

  • What is the cheapest month to book a flight from Milwaukee to Portugal?

    Currently, December is the cheapest month in which you can book a flight from Milwaukee to Portugal (average of $411). Flying from Milwaukee to Portugal in June is currently the most expensive (average of $690). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 4 airlines flying from Milwaukee to Portugal

Discover the top 4 airlines that operate flights from Milwaukee 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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$509Average$1,148FlexibilityNo cancel feeOn-time69%
DeltaCheapest$668Average$1,168FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$703Average$1,247FlexibilityNo cancel feeOn-time71%
KLMCheapest$827Average$1,347FlexibilityNo cancel feeOn-time75%

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