What airlines fly to Portugal?

TAP AIR PORTUGAL, United Airlines and British Airways are the top three most popular airlines that fly to Portugal from Milwaukee according to our data. TAP AIR PORTUGAL is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 18 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Milwaukee-Mitchell to Portugal?

Air Europa, United Airlines, and Delta are the most popular carriers operating from Milwaukee-Mitchell to Portugal

When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Portugal?

Prices for flights from Milwaukee-Mitchell Airport to Portugal are updated daily.

How many operators does momondo search for flights from Milwaukee-Mitchell Airport to Portugal?

There are 4 operators available for flights from Milwaukee-Mitchell Airport to Portugal as of December 2025.

How old do you have to be to fly from Milwaukee-Mitchell Airport to Portugal?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Portugal.

What documentation or ID do you need to fly to Portugal?

The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$263 Cheap Flights from Milwaukee to Portugal in 2025/26

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Find the cheapest flights from Milwaukee to Portugal

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:30 am - 12:50 pm

MKE

OPO

19h 20m2 stops

6:00 am - 5:37 pm

OPO

MKE

17h 37m2 stops

$479Lufthansa

Tue, Feb 3 - Thu, Feb 12

11:39 am - 8:10 am

MKE

LIS

14h 31m1 stop

5:00 am - 5:37 pm

LIS

MKE

18h 37m2 stops

$485Lufthansa

Tue, Feb 24 - Tue, Mar 3

11:30 am - 8:10 am

MKE

LIS

14h 40m2 stops

5:00 am - 8:48 pm

LIS

MKE

21h 48m2 stops

$486United Airlines

Thu, Jan 29 - Wed, Feb 11

11:20 am - 8:00 am

MKE

LIS

14h 40m1 stop

5:00 am - 12:29 pm

LIS

MKE

37h 29m2 stops

$488Delta

Mon, Jan 26 - Sun, Feb 8

11:30 am - 8:10 am

MKE

LIS

14h 40m2 stops

11:20 am - 2:05 pm

LIS

MKE

32h 45m2 stops

$491United Airlines

Tue, Feb 24 - Tue, Mar 3

4:30 pm - 2:55 pm

MKE

LIS

16h 25m2 stops

8:20 am - 8:25 pm

LIS

MKE

17h 05m2 stops

$492American Airlines

Mon, Feb 9 - Mon, Mar 9

11:30 am - 11:40 am

MKE

OPO

18h 10m2 stops

6:00 am - 9:59 pm

OPO

MKE

21h 59m2 stops

$492Lufthansa

Tue, Feb 3 - Tue, Feb 10

7:00 am - 8:00 am

MKE

LIS

19h 00m1 stop

5:00 am - 4:54 pm

LIS

MKE

17h 54m2 stops

$496KLM

Sun, Apr 12 - Wed, Apr 22

6:00 am - 9:05 am

MKE

LIS

21h 05m1 stop

11:05 am - 9:52 am

LIS

MKE

28h 47m1 stop

$498American Airlines

Mon, Jan 26 - Sun, Feb 8

7:05 am - 10:30 am

MKE

OPO

21h 25m2 stops

5:00 am - 8:58 pm

OPO

MKE

21h 58m2 stops

$499Delta

Mon, Feb 2 - Mon, Feb 9

Delta flights from Milwaukee to Portugal

Our best Delta deals on Milwaukee to Portugal flight tickets

Delta

Jan 26

MKE11:20 amMilwaukee-Mitchell

14h 40m

1 stop

LIS8:00 amLisbon Humberto Delgado

Feb 8

LIS5:00 amLisbon Humberto Delgado

37h 29m

2 stops

MKE12:29 pmMilwaukee-Mitchell

$488

Find similar

Delta

Feb 2

MKE11:24 amMilwaukee-Mitchell

17h 06m

2 stops

OPO10:30 amPorto

Feb 10

OPO5:00 amPorto

22h 45m

2 stops

MKE9:45 pmMilwaukee-Mitchell

$499

Find similar

Delta

Feb 5

MKE6:00 amMilwaukee-Mitchell

22h 25m

2 stops

OPO10:25 amPorto

Feb 9

OPO11:25 amPorto

29h 15m

2 stops

MKE10:40 amMilwaukee-Mitchell

$504

Find similar

United Airlines flights from Milwaukee to Portugal

Our best United Airlines deals on Milwaukee to Portugal flight tickets

United Airlines

Jan 29

MKE11:30 amMilwaukee-Mitchell

14h 40m

2 stops

LIS8:10 amLisbon Humberto Delgado

Feb 11

LIS5:00 amLisbon Humberto Delgado

21h 48m

2 stops

MKE8:48 pmMilwaukee-Mitchell

$486

Find similar

United Airlines

Feb 24

MKE11:30 amMilwaukee-Mitchell

14h 40m

2 stops

LIS8:10 amLisbon Humberto Delgado

Mar 3

LIS11:20 amLisbon Humberto Delgado

32h 45m

2 stops

MKE2:05 pmMilwaukee-Mitchell

$491

Find similar

United Airlines

Apr 20

MKE9:23 amMilwaukee-Mitchell

19h 07m

2 stops

LIS10:30 amLisbon Humberto Delgado

Apr 28

LIS7:25 amLisbon Humberto Delgado

19h 23m

2 stops

MKE8:48 pmMilwaukee-Mitchell

$499

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 2/3

11:30 am-12:50 pm

2 stops19h 20m

Porto

Thu 2/12

6:00 am-5:37 pm

2 stops17h 37m

$479

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Tue 2/24

11:39 am-8:10 am

1 stop14h 31m

Lisbon Humberto Delgado

Tue 3/3

5:00 am-5:37 pm

2 stops18h 37m

$485

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Thu 1/29

11:30 am-8:10 am

2 stops14h 40m

Lisbon Humberto Delgado

Wed 2/11

5:00 am-8:48 pm

2 stops21h 48m

$486

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 1/26

11:20 am-8:00 am

1 stop14h 40m

Lisbon Humberto Delgado

Sun 2/8

5:00 am-12:29 pm

2 stops37h 29m

$488

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Tue 2/24

11:30 am-8:10 am

2 stops14h 40m

Lisbon Humberto Delgado

Tue 3/3

11:20 am-2:05 pm

2 stops32h 45m

$491

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 2/9

4:30 pm-2:55 pm

2 stops16h 25m

Lisbon Humberto Delgado

Mon 3/9

8:20 am-8:25 pm

2 stops17h 05m

$492

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 2/3

11:30 am-11:40 am

2 stops18h 10m

Porto

Tue 2/10

6:00 am-9:59 pm

2 stops21h 59m

$492

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Sun 4/12

7:00 am-8:00 am

1 stop19h 00m

Lisbon Humberto Delgado

Wed 4/22

5:00 am-4:54 pm

2 stops17h 54m

$496

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 1/26

6:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Sun 2/8

11:05 am-9:52 am

1 stop28h 47m

$498

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 2/2

7:05 am-10:30 am

2 stops21h 25m

Porto

Mon 2/9

5:00 am-8:58 pm

2 stops21h 58m

$499

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Milwaukee to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Milwaukee is in November. Flight prices, which tend to average around $673, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Milwaukee during February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $714.

Can stopping save me money on Milwaukee to Portugal flights?

You could potentially save up to 2% on your flight if you consider stops on a Milwaukee to Portugal flight.

Cheap Milwaukee to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Milwaukee to Portugal

Fastest flight time	14h 31m
Direct flights	None

The fastest flight from Milwaukee to Portugal takes 14h 31m

There are no direct flights from Milwaukee to Portugal. There are no popular flight routes from Milwaukee to Portugal.

Search flight deals

When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Portugal?
Prices for flights from Milwaukee-Mitchell Airport to Portugal are updated daily.
How many operators does momondo search for flights from Milwaukee-Mitchell Airport to Portugal?
There are 4 operators available for flights from Milwaukee-Mitchell Airport to Portugal as of December 2025.
How old do you have to be to fly from Milwaukee-Mitchell Airport to Portugal?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Milwaukee to Portugal

Compare and see reviews for airlines that fly from Milwaukee to Portugal with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $509	Free Cancellation	Rating 7.4 9,126 reviews	Search United Airlines flights
Delta	PriceFrom $668	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
KLM	PriceFrom $670	Free Cancellation	Rating 7.7 1,435 reviews	Search KLM flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Milwaukee to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Milwaukee to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Milwaukee to Portugal with flexible booking policies on momondo?

All flight searches from Milwaukee to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Milwaukee to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Milwaukee to Portugal.

I’m not ready to book a flight from Milwaukee to Portugal right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Milwaukee to Portugal flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.