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$482+ Cheap flights from Milwaukee (MKE) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Milwaukee to Porto

Cheapest flights from Milwaukee to Porto
Explore the most affordable flight options available from Milwaukee to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/251:25 pm
MKE
-
OPO
2 stops28h 15m
Lufthansa
Wed 3/412:30 pm
OPO
-
MKE
2 stops15h 58m
Lufthansa
Deal found 1/26$482
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:30 am
MKE
-
OPO
2 stops16h 00m
United Airlines
Wed 3/46:00 am
OPO
-
MKE
2 stops18h 43m
United Airlines
Deal found 1/26$492
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:00 am
MKE
-
OPO
2 stops21h 30m
Delta
Tue 3/35:00 am
OPO
-
MKE
2 stops17h 08m
Delta
Deal found 1/26$494
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/251:25 pm
MKE
-
OPO
2 stops28h 15m
Lufthansa
Sun 3/112:30 pm
OPO
-
MKE
2 stops15h 58m
Lufthansa
Deal found 1/26$495
This United Airlines deal was found by Cheapflights users on 1/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/261:25 pm
MKE
-
OPO
2 stops14h 05m
United Airlines
Tue 3/312:35 pm
OPO
-
MKE
2 stops15h 09m
United Airlines
Deal found 1/26$500
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/261:25 pm
MKE
-
OPO
2 stops27h 00m
Lufthansa
Sun 3/16:00 am
OPO
-
MKE
2 stops22h 28m
Lufthansa
Deal found 1/26$507
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/231:25 pm
MKE
-
OPO
2 stops27h 00m
Lufthansa
Sat 3/71:45 pm
OPO
-
MKE
2 stops37h 05m
Lufthansa
Deal found 1/26$519
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2811:39 am
MKE
-
OPO
1 stop15h 51m
Lufthansa
Sat 3/71:45 pm
OPO
-
MKE
2 stops37h 05m
Lufthansa
Deal found 1/26$599
This KAYAK deal was found by Cheapflights users on 1/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/271:25 pm
MKE
-
OPO
2 stops16h 15m
Lufthansa
Fri 3/612:30 pm
OPO
-
MKE
2 stops16h 13m
Lufthansa
Deal found 1/26$607

Find flight deals from Milwaukee to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Round-trip from

$482
(FlightHub)
From Milwaukee-Mitchell to Porto
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Milwaukee to Porto 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 January 27, 2026.
Use the filters below to find and compare flights from Milwaukee to Porto that are best for you.

Fly from

Milwaukee

Fly to

Porto

Route

Depart

Return

Price

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

$482

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 2/24

1:21 pm-10:30 am

2 stops15h 09m

Porto

Mon 3/2

5:00 am-4:08 pm

2 stops17h 08m

$494

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 2/24

7:05 am-10:30 am

2 stops21h 25m

Porto

Fri 3/6

11:20 am-4:13 pm

2 stops34h 53m

$500

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 2/26

7:00 am-10:30 am

2 stops21h 30m

Porto

Thu 3/5

5:00 am-8:38 pm

2 stops21h 38m

$500

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 2/23

6:40 am-10:30 am

2 stops21h 50m

Porto

Fri 3/6

11:20 am-4:13 pm

2 stops34h 53m

$500

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 2/26

1:25 pm-11:40 am

2 stops16h 15m

Porto

Wed 3/4

6:00 am-6:43 pm

2 stops18h 43m

$507

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 2/23

1:25 pm-2:55 pm

2 stops19h 30m

Porto

Sun 3/1

6:00 am-10:28 pm

2 stops22h 28m

$507

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 2/27

1:25 pm-11:40 am

2 stops16h 15m

Porto

Sun 3/1

12:30 pm-10:28 pm

2 stops15h 58m

$607

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 2/17

1:35 pm-10:30 am

2 stops14h 55m

Porto

Wed 2/25

11:15 am-10:39 pm

2 stops17h 24m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Best time to book a flight from Milwaukee to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

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

Currently, November is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $449). Flying from Milwaukee to Porto 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.

Related info for your journey

Find useful and relevant information for your journey from Milwaukee to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Milwaukee to Porto?

    Lufthansa and Delta can get you from Milwaukee to Porto in just under 15h 09m. Your travel time can differ by up to 13h 06m. The distance from Milwaukee to Porto is about 3900 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Milwaukee to Porto 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 Porto?

    Currently, November is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $449). Flying from Milwaukee to Porto 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

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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