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

American Airlines, Lufthansa, and KLM are the most popular carriers operating from Milwaukee-Mitchell to Portugal

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 59% 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.

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.

$324 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:29 am - 8:10 am

MKE

LIS

14h 41m1 stop

3:55 pm - 8:55 pm

LIS

MKE

35h 00m2 stops

$445Lufthansa

Sun, Feb 8 - Sun, Mar 1

5:51 pm - 9:30 am

MKE

OPO

10h 39m1 stop

12:30 pm - 6:43 pm

OPO

MKE

35h 13m2 stops

$477Lufthansa

Mon, Mar 16 - Wed, Mar 25

3:20 pm - 9:20 am

MKE

LIS

36h 00m2 stops

5:00 am - 9:59 pm

LIS

MKE

22h 59m2 stops

$478Multiple Airlines

Tue, Jan 20 - Sun, Jan 25

3:24 pm - 12:50 pm

MKE

OPO

16h 26m2 stops

12:30 pm - 6:43 pm

OPO

MKE

35h 13m2 stops

$479Lufthansa

Mon, Mar 16 - Wed, Mar 25

5:51 pm - 9:30 am

MKE

OPO

10h 39m1 stop

6:00 am - 10:30 am

OPO

MKE

33h 30m2 stops

$486United Airlines

Tue, Mar 17 - Wed, Mar 25

3:20 pm - 9:20 am

MKE

LIS

36h 00m2 stops

5:00 am - 9:59 pm

LIS

MKE

22h 59m2 stops

$488Multiple Airlines

Wed, Jan 14 - Wed, Jan 21

3:24 pm - 9:30 am

MKE

OPO

13h 06m2 stops

12:30 pm - 12:35 pm

OPO

MKE

29h 05m2 stops

$491United Airlines

Tue, Mar 17 - Wed, Mar 25

2:32 pm - 9:20 am

MKE

LIS

36h 48m2 stops

11:20 am - 3:43 pm

LIS

MKE

34h 23m2 stops

$493Air Canada

Mon, Jan 19 - Mon, Jan 26

7:05 am - 8:00 am

MKE

LIS

18h 55m1 stop

5:00 am - 8:54 pm

LIS

MKE

21h 54m2 stops

$497Delta

Mon, Jan 19 - Tue, Jan 27

1:21 pm - 3:25 pm

MKE

OPO

20h 04m2 stops

5:00 am - 9:27 pm

OPO

MKE

21h 27m2 stops

$499Delta

Thu, Mar 5 - Thu, Mar 12

Lufthansa flights from Milwaukee to Portugal

Our best Lufthansa deals on Milwaukee to Portugal flight tickets

Lufthansa

Feb 8

MKE11:29 amMilwaukee-Mitchell

14h 41m

1 stop

LIS8:10 amLisbon Humberto Delgado

Mar 1

LIS3:55 pmLisbon Humberto Delgado

35h 00m

2 stops

MKE8:55 pmMilwaukee-Mitchell

$445

Find similar

Lufthansa

Mar 16

MKE5:51 pmMilwaukee-Mitchell

10h 39m

1 stop

OPO9:30 amPorto

Mar 25

OPO12:30 pmPorto

35h 13m

2 stops

MKE6:43 pmMilwaukee-Mitchell

$477

Find similar

Lufthansa

Mar 16

MKE3:24 pmMilwaukee-Mitchell

16h 26m

2 stops

OPO12:50 pmPorto

Mar 25

OPO12:30 pmPorto

35h 13m

2 stops

MKE6:43 pmMilwaukee-Mitchell

$479

Find similar

KLM flights from Milwaukee to Portugal

Our best KLM deals on Milwaukee to Portugal flight tickets

KLM

Feb 8

MKE7:05 amMilwaukee-Mitchell

18h 55m

1 stop

LIS8:00 amLisbon Humberto Delgado

Mar 1

LIS10:00 amLisbon Humberto Delgado

16h 36m

1 stop

MKE8:36 pmMilwaukee-Mitchell

$556

Find similar

KLM

Jan 20

MKE7:05 amMilwaukee-Mitchell

18h 55m

1 stop

LIS8:00 amLisbon Humberto Delgado

Jan 25

LIS10:00 amLisbon Humberto Delgado

16h 58m

1 stop

MKE8:58 pmMilwaukee-Mitchell

$578

Find similar

KLM

Jan 20

MKE7:05 amMilwaukee-Mitchell

18h 55m

1 stop

LIS8:00 amLisbon Humberto Delgado

Jan 25

LIS10:00 amLisbon Humberto Delgado

16h 58m

1 stop

MKE8:58 pmMilwaukee-Mitchell

$581

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Sun 2/8

11:29 am-8:10 am

1 stop14h 41m

Lisbon Humberto Delgado

Sun 3/1

3:55 pm-8:55 pm

2 stops35h 00m

$445

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/16

5:51 pm-9:30 am

1 stop10h 39m

Porto

Wed 3/25

12:30 pm-6:43 pm

2 stops35h 13m

$477

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Tue 1/20

3:20 pm-9:20 am

2 stops36h 00m

Lisbon Humberto Delgado

Sun 1/25

5:00 am-9:59 pm

2 stops22h 59m

$478

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 3/16

3:24 pm-12:50 pm

2 stops16h 26m

Porto

Wed 3/25

12:30 pm-6:43 pm

2 stops35h 13m

$479

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/17

5:51 pm-9:30 am

1 stop10h 39m

Porto

Wed 3/25

6:00 am-10:30 am

2 stops33h 30m

$486

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 1/14

3:20 pm-9:20 am

2 stops36h 00m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-9:59 pm

2 stops22h 59m

$488

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/17

3:24 pm-9:30 am

2 stops13h 06m

Porto

Wed 3/25

12:30 pm-12:35 pm

2 stops29h 05m

$491

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 1/19

2:32 pm-9:20 am

2 stops36h 48m

Lisbon Humberto Delgado

Mon 1/26

11:20 am-3:43 pm

2 stops34h 23m

$493

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 1/19

7:05 am-8:00 am

1 stop18h 55m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-8:54 pm

2 stops21h 54m

$497

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 3/5

1:21 pm-3:25 pm

2 stops20h 04m

Porto

Thu 3/12

5:00 am-9:27 pm

2 stops21h 27m

$499

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 $698.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Sunday is the cheapest day to fly to Portugal from Milwaukee. The lowest ticket price found for a Sunday departure recently was $911. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $1,186.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is at noon. Flights from Milwaukee to Portugal during this time can be as low as $905. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,072 per ticket.

Can stopping save me money on Milwaukee to Portugal flights?

You could potentially save up to 38% 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	10h 39m
Direct flights	None

The fastest flight from Milwaukee to Portugal takes 10h 39m

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 9,091 reviews	Search United Airlines flights
Delta	PriceFrom $668	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 11,053 reviews	Search American Airlines flights
KLM	PriceFrom $827	Free Cancellation	Rating 7.7 1,430 reviews	Search KLM 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.