Which airports can I use when flying from Milwaukee to Porto?

Flights from Milwaukee to Porto usually depart from Milwaukee-Mitchell (MKE) and arrive at Porto (OPO).

What cabin classes can I book on flights from Milwaukee to Porto?

Only Economy Class is available on flights from Milwaukee to Porto.

Which airports do connecting flights from Milwaukee to Porto pass through?

Most connecting flights from Milwaukee to Porto pass through Newark (EWR), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from Milwaukee to Porto?

Yes. Being flexible with your travel dates can save you up to 56% on the Milwaukee to Porto route. Thursday is the cheapest departure day at $878 round-trip on average, while Friday is the most expensive at $1,981, a difference of $1,103. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Porto?

Some of the most popular sights in Porto are Ribeira, Ribeira Square and Mercado do Bolhão. These are among the most viewed places in Porto on KAYAK.

Do I need a passport to fly from Milwaukee to Porto?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Have flight prices from Milwaukee to Porto changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $665 to $4,775. That means the highest observed fare was about 7x higher than the lowest one.

What is the time difference between Milwaukee and Porto?

Porto is 6 hours ahead of Milwaukee (Western European Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Porto Airport (OPO)?

Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include: • Klass Wagen • Drive on Holiday • GREEN MOTION • Goldcar Rental SP • SURPRICE CAR RENTAL

How much should I expect to pay for a Milwaukee to Porto flight?

Round-trip flights from Milwaukee to Porto range from $869 to $1,122, with an average of $920 over the past 12 months. Anything below $869 counts as a good deal.

What is the cheapest airline to fly from Milwaukee to Porto?

Delta ($665) and United Airlines ($716) are the cheapest airlines to fly round-trip from Milwaukee to Porto according to KAYAK data over the last 5 days.

What is the cheapest layover airport when flying from Milwaukee to Porto?

Flights via Newark (EWR) offer the most affordable fares, with an average round-trip price of $1,452. Based on KAYAK data over the past 3 months.

When flying from Milwaukee to Porto which airport offers the shortest layover?

Newark (EWR) had the shortest average connection time for Milwaukee to Porto layovers at 577 minutes over the past 3 months.

$665 CHEAP FLIGHTS from Milwaukee to Porto (MKE - OPO)

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Cheapest round-trip

$665

Typical prices: $869-$1,122

Delta

Sat 10/13Sat 10/20

MKE - OPO • 2 stops

When to travel

November

Cheapest • 27% price drop

June

Most popular

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Flight Deals

Cheap Flights from Milwaukee to Porto (MKE-OPO)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Milwaukee to Porto

Tue, Oct 13 - Tue, Oct 20

4:56 pm - 3:25 pmMKE Milwaukee-Mitchell-OPO Porto

16h 29m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

6:15 am - 6:04 pmOPO Porto-MKE Milwaukee-Mitchell

17h 49m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County

$665Delta

Tue, Oct 13 - Wed, Oct 21

8:00 am - 10:30 amMKE Milwaukee-Mitchell-OPO Porto

20h 30m1 stop New York John F Kennedy Intl

5:00 am - 4:05 pmOPO Porto-MKE Milwaukee-Mitchell

17h 05m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$668Delta

Tue, Oct 13 - Tue, Oct 20

8:00 am - 10:30 amMKE Milwaukee-Mitchell-OPO Porto

20h 30m1 stop New York John F Kennedy Intl

6:15 am - 8:06 pmOPO Porto-MKE Milwaukee-Mitchell

19h 51m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County

$675Delta

Tue, Oct 13 - Wed, Oct 21

8:00 am - 10:30 amMKE Milwaukee-Mitchell-OPO Porto

20h 30m1 stop New York John F Kennedy Intl

12:40 pm - 8:35 pmOPO Porto-MKE Milwaukee-Mitchell

13h 55m1 stop New York John F Kennedy Intl

$676Delta

Sun, Oct 11 - Thu, Oct 22

8:00 am - 10:25 amMKE Milwaukee-Mitchell-OPO Porto

20h 25m1 stop New York John F Kennedy Intl

1:25 pm - 8:35 pmOPO Porto-MKE Milwaukee-Mitchell

13h 10m1 stop New York John F Kennedy Intl

$688Delta

Tue, Oct 13 - Wed, Oct 21

5:45 pm - 3:30 pmMKE Milwaukee-Mitchell-OPO Porto

15h 45m2 stops Minneapolis St Paul Amsterdam Schiphol

5:00 am - 4:31 pmOPO Porto-MKE Milwaukee-Mitchell

17h 31m2 stops Amsterdam Schiphol Minneapolis St Paul

$699Delta

Wed, Oct 14 - Wed, Oct 21

4:56 pm - 6:20 pmMKE Milwaukee-Mitchell-OPO Porto

19h 24m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

12:40 pm - 8:35 pmOPO Porto-MKE Milwaukee-Mitchell

13h 55m1 stop New York John F Kennedy Intl

$706Delta

Sun, Oct 25 - Sun, Nov 1

6:18 pm - 9:30 amMKE Milwaukee-Mitchell-OPO Porto

34h 12m2 stops Chicago O'Hare Intl Newark

6:00 am - 9:50 pmOPO Porto-MKE Milwaukee-Mitchell

20h 50m2 stops Frankfurt am Main Chicago O'Hare Intl

$716United Airlines

Thu, Oct 15 - Wed, Oct 21

6:32 pm - 7:10 amMKE Milwaukee-Mitchell-OPO Porto

30h 38m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

11:20 am - 3:11 pmOPO Porto-MKE Milwaukee-Mitchell

33h 51m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$729United Airlines

Mon, Oct 12 - Wed, Oct 21

7:18 am - 9:45 amMKE Milwaukee-Mitchell-OPO Porto

44h 27m2 stops Chicago O'Hare Intl Newark

11:20 am - 3:11 pmOPO Porto-MKE Milwaukee-Mitchell

33h 51m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$735United Airlines

Recent last minute flight deals from Milwaukee to Porto

Fri, Sep 18 - Sun, Sep 27

7:05 pm - 6:55 amMKE Milwaukee-Mitchell-OPO Porto

29h 50m1 stop Newark

6:00 am - 11:37 pmOPO Porto-MKE Milwaukee-Mitchell

23h 37m2 stops Frankfurt am Main New York John F Kennedy Intl

$1,087Lufthansa

Tue, Sep 15 - Tue, Sep 29

10:44 am - 3:25 pmMKE Milwaukee-Mitchell-OPO Porto

22h 41m2 stops New York LaGuardia Paris Charles de Gaulle

5:00 am - 6:07 pmOPO Porto-MKE Milwaukee-Mitchell

19h 07m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$1,132Delta

Tue, Sep 15 - Mon, Sep 28

10:44 am - 3:25 pmMKE Milwaukee-Mitchell-OPO Porto

22h 41m2 stops New York LaGuardia Paris Charles de Gaulle

4:25 pm - 5:07 pmOPO Porto-MKE Milwaukee-Mitchell

30h 42m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

$1,152Delta

Tue, Sep 15 - Wed, Sep 30

6:05 am - 6:15 amMKE Milwaukee-Mitchell-OPO Porto

18h 10m1 stop Newark

6:00 am - 11:37 pmOPO Porto-MKE Milwaukee-Mitchell

23h 37m2 stops Frankfurt am Main Newark

$1,155United Airlines

Fri, Sep 18 - Sun, Sep 27

10:30 am - 9:45 amMKE Milwaukee-Mitchell-OPO Porto

17h 15m2 stops Chicago O'Hare Intl Newark

11:15 am - 10:07 amOPO Porto-MKE Milwaukee-Mitchell

28h 52m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,216Multiple Airlines

Fri, Sep 18 - Sun, Sep 20

11:45 am - 9:45 amMKE Milwaukee-Mitchell-OPO Porto

16h 00m1 stop Newark

4:35 pm - 9:00 pmOPO Porto-MKE Milwaukee-Mitchell

34h 25m2 stops Frankfurt am Main Chicago O'Hare Intl

$1,228Lufthansa

Tue, Sep 15 - Tue, Sep 29

6:05 am - 6:15 amMKE Milwaukee-Mitchell-OPO Porto

18h 10m1 stop Newark

12:15 pm - 3:11 pmOPO Porto-MKE Milwaukee-Mitchell

32h 56m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,288United Airlines

Fri, Sep 18 - Sun, Sep 20

5:00 am - 9:45 amMKE Milwaukee-Mitchell-OPO Porto

22h 45m2 stops Chicago O'Hare Intl Newark

12:10 pm - 8:08 pmOPO Porto-MKE Milwaukee-Mitchell

37h 58m2 stops Frankfurt am Main Newark

$1,298United Airlines

Tue, Sep 15 - Sat, Sep 26

6:05 am - 6:15 amMKE Milwaukee-Mitchell-OPO Porto

18h 10m1 stop Newark

6:00 am - 9:25 pmOPO Porto-MKE Milwaukee-Mitchell

21h 25m2 stops Frankfurt am Main Chicago O'Hare Intl

$1,360United Airlines

Tue, Sep 15 - Sat, Sep 26

5:00 am - 7:00 amMKE Milwaukee-Mitchell-OPO Porto

20h 00m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:00 am - 10:59 pmOPO Porto-MKE Milwaukee-Mitchell

22h 59m2 stops Frankfurt am Main Chicago O'Hare Intl

$1,364United Airlines

Booking Insights

Price, demand and travel trends for Milwaukee to Porto flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Milwaukee to Porto with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Milwaukee to Porto?

Round-trip flights from Milwaukee to Porto start at $665. Prices are below average for this route right now, with typical round-trip fares ranging from $869 to $1,122. The lowest price found in the past 5 days was $665 on Delta.

Find deals

Low season	January
High season	June

Most popular time to fly and prices are also 1% lower on average.

When to book flights from Milwaukee to Porto

Are your dates flexible? Find out the best times to travel from Milwaukee to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Milwaukee to Porto?
Flights from Milwaukee to Porto usually depart from Milwaukee-Mitchell (MKE) and arrive at Porto (OPO).
What cabin classes can I book on flights from Milwaukee to Porto?
Only Economy Class is available on flights from Milwaukee to Porto.
Which airports do connecting flights from Milwaukee to Porto pass through?
Most connecting flights from Milwaukee to Porto pass through Newark (EWR), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from Milwaukee to Porto?
Yes. Being flexible with your travel dates can save you up to 56% on the Milwaukee to Porto route. Thursday is the cheapest departure day at $878 round-trip on average, while Friday is the most expensive at $1,981, a difference of $1,103. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Porto?
Some of the most popular sights in Porto are Ribeira, Ribeira Square and Mercado do Bolhão. These are among the most viewed places in Porto on KAYAK.
Do I need a passport to fly from Milwaukee to Porto?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
Have flight prices from Milwaukee to Porto changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $665 to $4,775. That means the highest observed fare was about 7x higher than the lowest one.
What is the time difference between Milwaukee and Porto?
Porto is 6 hours ahead of Milwaukee (Western European Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Porto Airport (OPO)?
Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:
• Klass Wagen
• Drive on Holiday
• GREEN MOTION
• Goldcar Rental SP
• SURPRICE CAR RENTAL
How much should I expect to pay for a Milwaukee to Porto flight?
Round-trip flights from Milwaukee to Porto range from $869 to $1,122, with an average of $920 over the past 12 months. Anything below $869 counts as a good deal.

If your dates can be flexible, aim for a Thursday departure instead of Friday. On this route, Thursday flights average $878 - about $1,103 less than Friday (56% savings) based on the last 12 months.
If you can choose when to travel, plan your Milwaukee to Porto trip for November. Fares historically average $671 round-trip in that month - typically $1,310 less than the most expensive month, which is July (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to Porto Airport.
- Opo Hotel Porto Aeroporto

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MKE - OPO

$665 Find Cheap Flights from Milwaukee to Porto - Compare and Save

Everything you should know

Cheap Flights from Milwaukee to Porto (MKE-OPO)

Recent round-trip flight deals from Milwaukee to Porto

Recent one-way flight deals from Milwaukee to Porto

Recent last minute flight deals from Milwaukee to Porto

Price, demand and travel trends for Milwaukee to Porto flights

How much is a round-trip flight from Milwaukee to Porto?

What is the cheapest airline to fly from Milwaukee to Porto?

What is the cheapest layover airport when flying from Milwaukee to Porto?

When flying from Milwaukee to Porto which airport offers the shortest layover?

Key details for Milwaukee to Porto flights

Low season

High season

When to book flights from Milwaukee to Porto

Your Milwaukee to Porto flight questions, answered

Your guide to booking Milwaukee to Porto flights

More options for your flight from Milwaukee to Porto

Complete your trip to Porto with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Milwaukee to Porto

Find direct flights to and from Milwaukee and Porto

Flights from domestic origins to Porto

Flights to other popular destinations