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Cheap flights from Milwaukee to Portugal from $402

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Milwaukee to Portugal departing on 4/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Milwaukee to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
11:21 am - 11:15 pm
MKE
-
LIS
29h 54m
2 stops
British Airways Logo
7:20 am - 11:12 pm
LIS
-
MKE
21h 52m
2 stops
$457British Airways
Wed, Apr 22 - Wed, Apr 29
Multiple Airlines Logo
12:26 pm - 2:45 pm
MKE
-
LIS
20h 19m
2 stops
Multiple Airlines Logo
8:20 am - 5:54 pm
LIS
-
MKE
15h 34m
2 stops
$478Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
Lufthansa Logo
1:25 pm - 11:40 pm
MKE
-
OPO
28h 15m
2 stops
Lufthansa Logo
12:30 pm - 10:28 pm
OPO
-
MKE
15h 58m
2 stops
$481Lufthansa
Wed, Feb 25 - Wed, Mar 4
Delta Logo
1:21 pm - 10:30 am
MKE
-
OPO
15h 09m
2 stops
Delta Logo
5:00 am - 5:34 pm
OPO
-
MKE
18h 34m
2 stops
$493Delta
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
4:30 pm - 2:50 pm
MKE
-
LIS
16h 20m
2 stops
American Airlines Logo
7:45 am - 7:07 pm
LIS
-
MKE
17h 22m
2 stops
$502American Airlines
Wed, Feb 4 - Sun, Feb 8
American Airlines Logo
10:26 am - 9:05 am
MKE
-
LIS
16h 39m
1 stop
American Airlines Logo
8:20 am - 5:54 pm
LIS
-
MKE
15h 34m
2 stops
$505American Airlines
Thu, Feb 19 - Thu, Feb 26
Delta Logo
5:05 pm - 5:50 pm
MKE
-
LIS
18h 45m
2 stops
Delta Logo
12:45 pm - 7:11 pm
LIS
-
MKE
12h 26m
1 stop
$511Delta
Mon, Apr 13 - Mon, Apr 20
Lufthansa Logo
11:39 am - 8:10 am
MKE
-
LIS
14h 31m
1 stop
Lufthansa Logo
10:15 am - 5:37 pm
LIS
-
MKE
13h 22m
1 stop
$527Lufthansa
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
10:30 am - 11:40 am
MKE
-
OPO
19h 10m
2 stops
United Airlines Logo
6:00 am - 9:59 pm
OPO
-
MKE
21h 59m
2 stops
$556United Airlines
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
11:30 am - 9:30 am
MKE
-
OPO
16h 00m
2 stops
United Airlines Logo
6:00 am - 6:43 pm
OPO
-
MKE
17h 43m
2 stops
$637United Airlines
Fri, Mar 6 - Fri, Mar 13

American Airlines flights from Milwaukee to Portugal

Our best American Airlines deals on Milwaukee to Portugal flight tickets
American Airlines
Feb 4
MKE4:30 pmMilwaukee-Mitchell
16h 20m
2 stops
LIS2:50 pmLisbon Humberto Delgado
Feb 8
LIS7:45 amLisbon Humberto Delgado
17h 22m
2 stops
MKE7:07 pmMilwaukee-Mitchell
$502
American Airlines
Feb 19
MKE10:26 amMilwaukee-Mitchell
16h 39m
1 stop
LIS9:05 amLisbon Humberto Delgado
Feb 26
LIS8:20 amLisbon Humberto Delgado
15h 34m
2 stops
MKE5:54 pmMilwaukee-Mitchell
$505
American Airlines
Feb 4
MKE4:30 pmMilwaukee-Mitchell
16h 20m
2 stops
LIS2:50 pmLisbon Humberto Delgado
Feb 8
LIS11:05 amLisbon Humberto Delgado
15h 19m
1 stop
MKE8:24 pmMilwaukee-Mitchell
$553

KLM flights from Milwaukee to Portugal

Our best KLM deals on Milwaukee to Portugal flight tickets
KLM
Apr 22
MKE11:56 amMilwaukee-Mitchell
16h 49m
1 stop
LIS10:45 amLisbon Humberto Delgado
Apr 29
LIS10:00 amLisbon Humberto Delgado
16h 16m
1 stop
MKE8:16 pmMilwaukee-Mitchell
$664
KLM
Mar 5
MKE7:00 amMilwaukee-Mitchell
19h 55m
1 stop
LIS8:55 amLisbon Humberto Delgado
Mar 12
LIS5:00 amLisbon Humberto Delgado
18h 16m
2 stops
MKE6:16 pmMilwaukee-Mitchell
$705
KLM
Mar 5
MKE7:00 amMilwaukee-Mitchell
19h 55m
1 stop
LIS8:55 amLisbon Humberto Delgado
Mar 12
LIS10:00 amLisbon Humberto Delgado
15h 06m
1 stop
MKE8:06 pmMilwaukee-Mitchell
$714

momondo 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, momondo users made 832,500 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Milwaukee to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 4/22

11:21 am-11:15 pm

2 stops29h 54m

Lisbon Humberto Delgado

Wed 4/29

7:20 am-11:12 pm

2 stops21h 52m

$457

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Thu 2/19

12:26 pm-2:45 pm

2 stops20h 19m

Lisbon Humberto Delgado

Thu 2/26

8:20 am-5:54 pm

2 stops15h 34m

$478

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 2/25

1:25 pm-11:40 pm

2 stops28h 15m

Porto

Wed 3/4

12:30 pm-10:28 pm

2 stops15h 58m

$481

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 2/18

1:21 pm-10:30 am

2 stops15h 09m

Porto

Wed 2/25

5:00 am-5:34 pm

2 stops18h 34m

$493

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 2/4

4:30 pm-2:50 pm

2 stops16h 20m

Lisbon Humberto Delgado

Sun 2/8

7:45 am-7:07 pm

2 stops17h 22m

$502

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Thu 2/19

10:26 am-9:05 am

1 stop16h 39m

Lisbon Humberto Delgado

Thu 2/26

8:20 am-5:54 pm

2 stops15h 34m

$505

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 4/13

5:05 pm-5:50 pm

2 stops18h 45m

Lisbon Humberto Delgado

Mon 4/20

12:45 pm-7:11 pm

1 stop12h 26m

$511

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Thu 2/19

11:39 am-8:10 am

1 stop14h 31m

Lisbon Humberto Delgado

Thu 2/26

10:15 am-5:37 pm

1 stop13h 22m

$527

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 2/6

10:30 am-11:40 am

2 stops19h 10m

Porto

Tue 2/10

6:00 am-9:59 pm

2 stops21h 59m

$556

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 3/6

11:30 am-9:30 am

2 stops16h 00m

Porto

Fri 3/13

6:00 am-6:43 pm

2 stops17h 43m

$637

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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

15h 55m

Direct flights

None
The fastest flight from Milwaukee to Portugal takes 15h 55m
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?

  • 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 AirlinesPriceFrom $509Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
DeltaPriceFrom $595Free CancellationRating
7.9
8,088 reviews
Search Delta flights
American AirlinesPriceFrom $703Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
KLMPriceFrom $1,018Free CancellationRating
7.7
1,442 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.

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Find better results for your trip to Portugal

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