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$775+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
2 stars
Provider with most accurate pricing for Milwaukee-Mitchell-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Porto flights.
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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 April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:00 amMKE - OPO
2 stops26h 45mUnited Airlines
Sun 10/266:00 amOPO - MKE
2 stops21h 09mUnited Airlines
Deal found 4/15$775
This Gurufare deal was found by Cheapflights users on 4/16. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:40 pmMKE - OPO
2 stops23h 05mLufthansa
Sun 10/266:15 amOPO - MKE
2 stops20h 54mLufthansa
Deal found 4/16$814
This Delta deal was found by Cheapflights users on 4/16. 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.
Sun 5/186:34 pmMKE - OPO
2 stops16h 11mDelta
Mon 6/24:20 pmOPO - MKE
2 stops29h 47mDelta
Deal found 4/16$1,138
This KLM deal was found by Cheapflights users on 4/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/167:04 pmMKE - OPO
2 stops14h 31mKLM
Sun 6/15:00 amOPO - MKE
2 stops17h 07mKLM
Deal found 4/16$1,425
This Lufthansa deal was found by Cheapflights users on 4/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1611:38 amMKE - OPO
1 stop16h 07mMultiple Airlines
Sun 10/266:15 amOPO - MKE
2 stops20h 54mMultiple Airlines
Deal found 4/16$2,004
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/173:52 pmMKE - OPO
3 stops17h 08mAir Canada
Sun 6/110:00 amOPO - MKE
3 stops18h 25mAir Canada
Deal found 4/16$2,129

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 April 17, 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 5/18

6:34 pm-4:45 pm

2 stops16h 11m

Porto

Mon 6/2

4:20 pm-4:07 pm

2 stops29h 47m

$1,138

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/18

1:10 pm-10:50 pm

2 stops27h 40m

Porto

Sat 5/31

6:00 am-9:00 pm

2 stops21h 00m

$1,192

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 5/16

7:04 pm-3:35 pm

2 stops14h 31m

Porto

Mon 6/2

6:30 am-6:09 pm

2 stops17h 39m

$1,375

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sat 5/17

3:52 pm-3:00 pm

3 stops17h 08m

Porto

Sun 6/1

10:00 am-10:25 pm

3 stops18h 25m

$2,129

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sat 5/17

1:10 pm-11:15 am

2 stops16h 05m

Porto

Sun 6/1

9:15 am-5:58 pm

1 stop14h 43m

$2,492

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

  • Most accurate provider: When it comes to deals on Milwaukee-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Milwaukee-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Milwaukee-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Milwaukee-Porto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Milwaukee-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $1,081). 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.

What is the cheapest time of day to fly from MKE to OPO?

Find hourly flight availability from Milwaukee to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

When flying from Milwaukee to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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.

  • 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 $1,081). 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 Milwaukee?

Book flights to Milwaukee if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
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