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$681+ Cheap flights from Milwaukee (MKE) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — OPO
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$962
(United)

One-way from

$681
(American Airlines)
Provider with most accurate pricing for Milwaukee-Mitchell-Porto flight deals.
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Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Porto flights.
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From Milwaukee-Mitchell to Porto
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One-way flight 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 March 28, 2025.

This United deal was found by Cheapflights users on 3/28. 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 10/162:24 pmMKE - OPO
2 stops13h 21mUnited Airlines
Sun 10/266:00 amOPO - MKE
2 stops38h 04mUnited Airlines
Deal found 3/28$844
This Delta deal was found by Cheapflights users on 3/27. 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 3/2810:44 amMKE - OPO
2 stops16h 41mDelta
Fri 4/46:40 amOPO - MKE
2 stops17h 01mDelta
Deal found 3/27$880
This United deal was found by Cheapflights users on 3/27. 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.
Tue 9/26:08 pmMKE - OPO
2 stops33h 17mMultiple Airlines
Tue 9/1612:50 pmOPO - MKE
2 stops39h 06mMultiple Airlines
Deal found 3/27$962
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/41:48 pmMKE - OPO
2 stops20h 07mAmerican Airlines
Wed 5/218:15 amOPO - MKE
2 stops19h 12mAmerican Airlines
Deal found 3/27$990
This Priceline deal was found by Cheapflights users on 3/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/305:30 pmMKE - OPO
2 stops23h 50mLufthansa
Fri 4/46:15 amOPO - MKE
2 stops16h 27mLufthansa
Deal found 3/27$1,581
This Air Canada deal was found by Cheapflights users on 3/27. 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.
Sun 5/43:52 pmMKE - OPO
3 stops17h 28mAir Canada
Wed 5/2110:00 amOPO - MKE
3 stops16h 37mAir Canada
Deal found 3/27$1,755

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 March 28, 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

Tue 9/2

6:08 pm-9:25 am

2 stops33h 17m

Porto

Tue 9/16

12:50 pm-9:56 pm

2 stops39h 06m

$962

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 8/31

11:39 am-6:55 am

1 stop13h 16m

Porto

Wed 9/17

9:35 am-6:08 pm

1 stop14h 33m

$985

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/4

1:48 pm-3:55 pm

2 stops20h 07m

Porto

Wed 5/21

8:15 am-9:27 pm

2 stops19h 12m

$990

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 8/31

5:00 pm-3:30 pm

2 stops16h 30m

Porto

Wed 9/17

11:35 am-11:25 pm

2 stops17h 50m

$1,011

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/4

3:52 pm-3:20 pm

3 stops17h 28m

Porto

Wed 5/21

10:00 am-8:37 pm

3 stops16h 37m

$1,755

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 9/19

1:17 pm-11:40 am

2 stops16h 23m

$681

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 9/19

11:39 am-6:50 am

1 stop13h 11m

$718

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 9/19

3:44 pm-2:55 pm

3 stops17h 11m

$1,142

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

  • 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 $1,084). 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 March 28, 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).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated March 28, 2025.
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,603 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
8,981 reviews
Delta
8.0
Very good
7,897 reviews

Entertainment

7.9

Overall

8.0

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from Milwaukee to Porto round-trip?

    Our cheapest airline available from Milwaukee to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $985 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $990 and $1,011 round-trip.

  • What are the cheapest airlines to fly from Milwaukee to Porto one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $681. However, be on the lookout for offers from United Airlines and Air Canada, as they are both options that can get you from Milwaukee to Porto for a low price.

  • 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 $1,084). 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
Arcos de Valdevez

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