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$551+ 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 11/29. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
nov. 15 — nov. 221
sáb. 11/15
sáb. 11/22
1 adult, Economy
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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 octubre 16, 2025.

This Expedia deal was found by Cheapflights users on 10/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/2912:05 pmMKE - OPO
2 stops29h 35mLufthansa
sáb. 12/61:45 pmOPO - MKE
2 stops38h 02mLufthansa
Deal found 10/15$551
This United Airlines deal was found by Cheapflights users on 10/16. 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.
dom. 11/2312:05 pmMKE - OPO
2 stops15h 25mUnited Airlines
dom. 11/3012:30 pmOPO - MKE
3 stops56h 38mUnited Airlines
Deal found 10/16$942
This Delta deal was found by Cheapflights users on 10/16. 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.
vie. 11/217:00 amMKE - OPO
2 stops21h 30mDelta
vie. 11/286:30 amOPO - MKE
2 stops19h 37mDelta
Deal found 10/16$1,048
This Delta deal was found by Cheapflights users on 10/16. 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.
dom. 11/233:13 pmMKE - OPO
2 stops18h 12mDelta
dom. 11/3011:25 amOPO - MKE
2 stops42h 30mDelta
Deal found 10/16$1,054
This Delta deal was found by Cheapflights users on 10/16. 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.
sáb. 11/225:50 pmMKE - OPO
2 stops34h 40mDelta
dom. 11/3011:25 amOPO - MKE
2 stops36h 24mDelta
Deal found 10/16$1,133
This United Airlines deal was found by Cheapflights users on 10/16. 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.
sáb. 11/222:45 pmMKE - OPO
2 stops12h 45mUnited Airlines
dom. 11/3012:30 pmOPO - MKE
3 stops56h 38mUnited Airlines
Deal found 10/16$1,157
This Mytrip deal was found by Cheapflights users on 10/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/291:05 pmMKE - OPO
2 stops18h 05mMultiple Airlines
sáb. 12/612:40 pmOPO - MKE
3 stops27h 17mMultiple Airlines
Deal found 10/15$1,242
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/15. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/285:51 pmMKE - OPO
1 stop12h 59mMultiple Airlines
mar. 11/48:00 pmOPO - MKE
2 stops27h 56mMultiple Airlines
Deal found 10/15$1,497

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 octubre 16, 2025.

Round-trip from

$537
(United Airlines)
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 octubre 16, 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

sáb. 11/29

11:20 am-9:30 am

1 stop16h 10m

Porto

sáb. 12/6

12:30 pm-4:57 pm

2 stops34h 27m

$670

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

vie. 3/27

9:44 am-9:30 am

2 stops18h 46m

Porto

mar. 3/31

6:00 am-6:08 pm

2 stops18h 08m

$727

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

dom. 11/23

12:05 pm-9:30 am

2 stops15h 25m

Porto

dom. 11/30

12:30 pm-3:08 pm

3 stops56h 38m

$942

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

vie. 11/21

7:00 am-10:30 am

2 stops21h 30m

Porto

vie. 11/28

6:30 am-8:07 pm

2 stops19h 37m

$1,048

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

dom. 11/23

3:13 pm-3:25 pm

2 stops18h 12m

Porto

dom. 11/30

11:25 am-11:55 pm

2 stops42h 30m

$1,054

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

vie. 3/27

11:00 am-9:30 am

1 stop17h 30m

Porto

mar. 3/31

12:35 pm-9:37 pm

1 stop15h 02m

$1,116

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

sáb. 11/22

5:50 pm-10:30 am

2 stops34h 40m

Porto

dom. 11/30

11:25 am-5:49 pm

2 stops36h 24m

$1,133

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

dom. 11/23

10:53 am-9:30 am

2 stops16h 37m

Porto

vie. 11/28

6:00 am-6:47 pm

2 stops18h 47m

$1,157

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

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, December is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $389). Flying from Milwaukee to Porto in June is currently the most expensive (average of $695). 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 United Airlines can get you from Milwaukee to Porto in just under 16h 10m. Your travel time can differ by up to 2h 36m. 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, December is the cheapest month in which you can book a flight from Milwaukee to Porto (average of $389). Flying from Milwaukee to Porto in June is currently the most expensive (average of $695). 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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