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$594+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap 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 August 20, 2025.

Round-trip from

$594
(United Airlines)
From Milwaukee-Mitchell to Porto
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Find 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 August 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/19. 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.
Sun 10/262:45 pmMKE - OPO
2 stops13h 45mUnited Airlines
Tue 11/46:00 amOPO - MKE
2 stops17h 17mUnited Airlines
Deal found 8/19$594
This United deal was found by Cheapflights users on 8/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:13 pmMKE - OPO
2 stops17h 02mMultiple Airlines
Tue 11/412:35 pmOPO - MKE
1 stop34h 34mMultiple Airlines
Deal found 8/19$625
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 10/176:35 pmMKE - OPO
2 stops14h 55mDelta
Sat 10/256:05 amOPO - MKE
2 stops20h 02mDelta
Deal found 8/18$841
This Orbitz deal was found by Cheapflights users on 8/19. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/265:51 pmMKE - OPO
1 stop10h 39mLufthansa
Tue 11/412:35 pmOPO - MKE
1 stop34h 34mLufthansa
Deal found 8/19$855
This United deal was found by Cheapflights users on 8/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amMKE - OPO
2 stops23h 15mMultiple Airlines
Sun 10/266:00 amOPO - MKE
2 stops19h 50mMultiple Airlines
Deal found 8/19$896
This Gurufare deal was found by Cheapflights users on 8/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:15 pmMKE - OPO
2 stops21h 30mLufthansa
Fri 10/1011:05 amOPO - MKE
2 stops41h 26mLufthansa
Deal found 8/19$1,133
This Gurufare deal was found by Cheapflights users on 8/18. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1611:27 amMKE - OPO
1 stop16h 18mLufthansa
Sun 10/266:00 amOPO - MKE
2 stops20h 59mLufthansa
Deal found 8/18$1,219
This Air Canada deal was found by Cheapflights users on 8/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:44 pmMKE - OPO
3 stops17h 11mAir Canada
Sat 10/259:00 amOPO - MKE
3 stops18h 56mAir Canada
Deal found 8/18$1,374

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 August 20, 2025.
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

Sun 10/26

2:45 pm-9:30 am

2 stops13h 45m

Porto

Tue 11/4

6:00 am-5:17 pm

2 stops17h 17m

$594

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 10/26

5:13 pm-3:15 pm

2 stops17h 02m

Porto

Tue 11/4

12:35 pm-5:09 pm

1 stop34h 34m

$625

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 10/17

6:35 pm-3:30 pm

2 stops14h 55m

Porto

Sat 10/25

6:05 am-8:07 pm

2 stops20h 02m

$841

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 10/26

5:51 pm-9:30 am

1 stop10h 39m

Porto

Tue 11/4

12:35 pm-5:09 pm

1 stop34h 34m

$855

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

6:00 am-11:15 am

2 stops23h 15m

Porto

Sun 10/26

6:00 am-9:59 pm

2 stops20h 59m

$896

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

7:00 am-11:15 am

2 stops22h 15m

Porto

Sun 10/26

6:00 am-5:17 pm

2 stops16h 17m

$896

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 10/3

7:15 pm-10:45 pm

2 stops21h 30m

Porto

Fri 10/10

11:05 am-10:31 pm

2 stops41h 26m

$1,133

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

11:27 am-9:45 am

1 stop16h 18m

Porto

Sun 10/26

6:00 am-9:59 pm

2 stops20h 59m

$1,219

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

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, January is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $523). Flying from Milwaukee to Porto in June is currently the most expensive (average of $1,030). 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?

    United Airlines, Delta, and Lufthansa can get you from Milwaukee to Porto in just under 10h 39m. Your travel time can differ by up to 4h 16m. 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, January is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $523). Flying from Milwaukee to Porto in June is currently the most expensive (average of $1,030). 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
Aveiro
Arcos de Valdevez
Coimbra

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