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Cheap flights from Milwaukee to Portugal from $463

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 8/13. 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.
Delta Logo
2:00 pm - 10:30 am
MKE
-
OPO
14h 30m
1 stop
Delta Logo
1:25 pm - 8:08 pm
OPO
-
MKE
12h 43m
1 stop
$783Delta
Tue, Oct 13 - Thu, Oct 22
Delta Logo
6:25 pm - 3:25 pm
MKE
-
OPO
15h 00m
2 stops
Delta Logo
1:25 pm - 8:08 pm
OPO
-
MKE
12h 43m
1 stop
$788Delta
Tue, Oct 13 - Thu, Oct 22
American Airlines Logo
3:01 pm - 4:00 pm
MKE
-
OPO
18h 59m
2 stops
American Airlines Logo
8:20 am - 9:18 pm
OPO
-
MKE
17h 58m
2 stops
$806American Airlines
Sun, Oct 18 - Tue, Oct 27
United Airlines Logo
12:14 pm - 9:45 am
MKE
-
OPO
15h 31m
2 stops
United Airlines Logo
12:35 pm - 12:09 am
OPO
-
MKE
17h 34m
2 stops
$807United Airlines
Mon, Oct 19 - Wed, Oct 21
United Airlines Logo
5:10 am - 7:00 am
MKE
-
OPO
19h 50m
2 stops
United Airlines Logo
11:50 am - 11:36 pm
OPO
-
MKE
17h 46m
2 stops
$809United Airlines
Wed, Oct 14 - Thu, Oct 22
Delta Logo
11:00 am - 10:30 am
MKE
-
OPO
17h 30m
1 stop
Delta Logo
5:55 am - 4:45 pm
OPO
-
MKE
16h 50m
2 stops
$833Delta
Thu, Oct 15 - Wed, Oct 21
Delta Logo
2:00 pm - 10:30 am
MKE
-
OPO
14h 30m
1 stop
Delta Logo
5:00 am - 4:07 pm
OPO
-
MKE
17h 07m
2 stops
$836Delta
Tue, Oct 13 - Sat, Oct 24
Delta Logo
2:00 pm - 10:30 am
MKE
-
OPO
14h 30m
1 stop
Delta Logo
10:00 am - 8:08 pm
OPO
-
MKE
15h 08m
1 stop
$843Delta
Tue, Oct 13 - Mon, Oct 26
Iberia Logo
8:16 pm - 11:25 pm
MKE
-
LIS
21h 09m
2 stops
Iberia Logo
6:35 am - 5:40 pm
LIS
-
MKE
17h 05m
2 stops
$861Iberia
Sat, Oct 17 - Sat, Oct 24
Air France Logo
5:01 pm - 2:55 pm
MKE
-
LIS
15h 54m
2 stops
Air France Logo
5:35 am - 4:06 pm
LIS
-
MKE
16h 31m
2 stops
$870Air France
Fri, May 8 - Tue, May 12

American Airlines flights from Milwaukee to Portugal

Our best American Airlines deals on Milwaukee to Portugal flight tickets
American Airlines
Oct 18
MKE3:01 pmMilwaukee-Mitchell
18h 59m
2 stops
OPO4:00 pmPorto
Oct 27
OPO8:20 amPorto
17h 58m
2 stops
MKE9:18 pmMilwaukee-Mitchell
$806
American Airlines
Oct 17
MKE12:37 pmMilwaukee-Mitchell
14h 28m
1 stop
LIS9:05 amLisbon Humberto Delgado
Oct 24
LIS8:25 amLisbon Humberto Delgado
15h 15m
2 stops
MKE5:40 pmMilwaukee-Mitchell
$953
American Airlines
Oct 7
MKE12:37 pmMilwaukee-Mitchell
14h 28m
1 stop
LIS9:05 amLisbon Humberto Delgado
Oct 14
LIS6:35 amLisbon Humberto Delgado
17h 05m
2 stops
MKE5:40 pmMilwaukee-Mitchell
$974

KLM flights from Milwaukee to Portugal

Our best KLM deals on Milwaukee to Portugal flight tickets
KLM
Aug 13
MKE7:00 amMilwaukee-Mitchell
21h 30m
1 stop
OPO10:30 amPorto
Aug 24
OPO5:00 amPorto
15h 11m
2 stops
MKE2:11 pmMilwaukee-Mitchell
$998
KLM
Aug 10
MKE7:00 amMilwaukee-Mitchell
19h 00m
1 stop
LIS8:00 amLisbon Humberto Delgado
Aug 18
LIS11:55 amLisbon Humberto Delgado
17h 30m
2 stops
MKE11:25 pmMilwaukee-Mitchell
$1,002
KLM
Aug 30
MKE7:00 amMilwaukee-Mitchell
19h 00m
1 stop
LIS8:00 amLisbon Humberto Delgado
Dec 22
LIS10:00 amLisbon Humberto Delgado
16h 08m
1 stop
MKE8:08 pmMilwaukee-Mitchell
$1,007

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 April 24, 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

Cheapest round-trip
Quickest round-trip

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 10/13

2:00 pm-10:30 am

1 stop14h 30m

Porto

Thu 10/22

1:25 pm-8:08 pm

1 stop12h 43m

$783

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 10/13

6:25 pm-3:25 pm

2 stops15h 00m

Porto

Thu 10/22

1:25 pm-8:08 pm

1 stop12h 43m

$788

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 10/18

3:01 pm-4:00 pm

2 stops18h 59m

Porto

Tue 10/27

8:20 am-9:18 pm

2 stops17h 58m

$806

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 10/19

12:14 pm-9:45 am

2 stops15h 31m

Porto

Wed 10/21

12:35 pm-12:09 am

2 stops17h 34m

$807

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 10/14

5:10 am-7:00 am

2 stops19h 50m

Porto

Thu 10/22

11:50 am-11:36 pm

2 stops17h 46m

$809

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/15

11:00 am-10:30 am

1 stop17h 30m

Porto

Wed 10/21

5:55 am-4:45 pm

2 stops16h 50m

$833

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 10/13

2:00 pm-10:30 am

1 stop14h 30m

Porto

Sat 10/24

5:00 am-4:07 pm

2 stops17h 07m

$836

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 10/13

2:00 pm-10:30 am

1 stop14h 30m

Porto

Mon 10/26

10:00 am-8:08 pm

1 stop15h 08m

$843

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Sat 10/17

8:16 pm-11:25 pm

2 stops21h 09m

Lisbon Humberto Delgado

Sat 10/24

6:35 am-5:40 pm

2 stops17h 05m

$861

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Fri 5/8

5:01 pm-2:55 pm

2 stops15h 54m

Lisbon Humberto Delgado

Tue 5/12

5:35 am-4:06 pm

2 stops16h 31m

$870

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 28% 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 07m

Direct flights

None
The fastest flight from Milwaukee to Portugal takes 15h 07m
There are no direct flights from Milwaukee to Portugal. There are no popular flight routes from Milwaukee to Portugal.
Search flight deals

Frequently asked questions about flying from Milwaukee 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?

  • 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
9,643 reviews
Search United Airlines flights
American AirlinesPriceFrom $778Free CancellationRating
7.1
11,666 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.

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Find better results for your trip to Portugal

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