What airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and Iberia are the top three most popular airlines that fly to Porto from Milwaukee according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 10 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Porto Airport?

Prices for flights from Milwaukee-Mitchell Airport to Porto Airport refresh daily.

How old do you have to be to fly from Milwaukee-Mitchell Airport to Porto Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$594 Cheap Flights from Milwaukee to Porto (MKE-OPO) in 2025

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Find the cheapest flights from Milwaukee to Porto (MKE-OPO)

Round-trip

One-way

Cheap round-trip flights

2:45 pm - 9:30 amMKE-OPO

13h 45m2 stops

6:00 am - 5:17 pmOPO-MKE

17h 17m2 stops

$594United Airlines

Find Deal

Sun, Oct 26 - Tue, Nov 4

5:13 pm - 3:15 pmMKE-OPO

17h 02m2 stops

12:35 pm - 5:09 pmOPO-MKE

34h 34m1 stop

$625

Find Deal

Sun, Oct 26 - Tue, Nov 4

7:00 am - 3:45 pmMKE-OPO

26h 45m2 stops

12:30 pm - 5:17 pmOPO-MKE

33h 47m2 stops

$830United Airlines

Find Deal

Thu, Oct 16 - Sun, Oct 26

6:00 am - 11:15 amMKE-OPO

23h 15m2 stops

4:15 pm - 4:32 pmOPO-MKE

53h 17m2 stops

$836

Find Deal

Thu, Oct 16 - Sun, Oct 26

5:51 pm - 9:30 amMKE-OPO

10h 39m1 stop

12:35 pm - 5:09 pmOPO-MKE

34h 34m1 stop

$855Lufthansa

Find Deal

Sun, Oct 26 - Tue, Nov 4

6:00 am - 11:15 amMKE-OPO

23h 15m2 stops

6:00 am - 8:50 pmOPO-MKE

19h 50m2 stops

$896

Find Deal

Thu, Oct 16 - Sun, Oct 26

6:00 am - 3:45 pmMKE-OPO

27h 45m2 stops

12:30 pm - 4:32 pmOPO-MKE

33h 02m2 stops

$907

Find Deal

Thu, Oct 16 - Sun, Oct 26

7:15 pm - 10:45 pmMKE-OPO

21h 30m2 stops

11:05 am - 10:31 pmOPO-MKE

41h 26m2 stops

$1,133Lufthansa

Find Deal

Fri, Oct 3 - Fri, Oct 10

4:59 pm - 4:40 pmMKE-OPO

18h 41m2 stops

8:20 am - 6:30 pmOPO-MKE

16h 10m2 stops

$1,481British Airways

Find Deal

Sun, Oct 26 - Tue, Nov 4

3:44 pm - 2:55 pmMKE-OPO

17h 11m3 stops

10:00 am - 9:56 pmOPO-MKE

17h 56m3 stops

$1,746Air Canada

Find Deal

Fri, Oct 3 - Fri, Oct 10

United Airlines flights from Milwaukee to Porto

Our best United Airlines deals on Milwaukee to Porto flight tickets

United Airlines

Oct 26

MKE2:45 pmMilwaukee-Mitchell

13h 45m

2 stops

OPO9:30 amPorto

Nov 4

OPO6:00 amPorto

17h 17m

2 stops

MKE5:17 pmMilwaukee-Mitchell

$594

Find similar

United Airlines

Oct 16

MKE7:00 amMilwaukee-Mitchell

26h 45m

2 stops

OPO3:45 pmPorto

Oct 26

OPO12:30 pmPorto

33h 47m

2 stops

MKE5:17 pmMilwaukee-Mitchell

$830

Find similar

Lufthansa flights from Milwaukee to Porto

Our best Lufthansa deals on Milwaukee to Porto flight tickets

Lufthansa

Oct 26

MKE5:51 pmMilwaukee-Mitchell

10h 39m

1 stop

OPO9:30 amPorto

Nov 4

OPO12:35 pmPorto

34h 34m

1 stop

MKE5:09 pmMilwaukee-Mitchell

$855

Find similar

Lufthansa

Oct 3

MKE7:15 pmMilwaukee-Mitchell

21h 30m

2 stops

OPO10:45 pmPorto

Oct 10

OPO11:05 amPorto

41h 26m

2 stops

MKE10:31 pmMilwaukee-Mitchell

$1,133

Find similar

Lufthansa

Oct 16

MKE11:27 amMilwaukee-Mitchell

16h 18m

1 stop

OPO9:45 amPorto

Oct 26

OPO6:15 amPorto

20h 44m

2 stops

MKE9:59 pmMilwaukee-Mitchell

$1,230

Find similar

Fly from

Fly to

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

Thu 10/16

7:00 am-3:45 pm

2 stops26h 45m

Porto

Sun 10/26

12:30 pm-5:17 pm

2 stops33h 47m

$830

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

6:00 am-11:15 am

2 stops23h 15m

Porto

Sun 10/26

4:15 pm-4:32 pm

2 stops53h 17m

$836

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-8:50 pm

2 stops19h 50m

$896

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

6:00 am-3:45 pm

2 stops27h 45m

Porto

Sun 10/26

12:30 pm-4:32 pm

2 stops33h 02m

$907

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

Sun 10/26

4:59 pm-4:40 pm

2 stops18h 41m

Porto

Tue 11/4

8:20 am-6:30 pm

2 stops16h 10m

$1,481

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Fri 10/3

3:44 pm-2:55 pm

3 stops17h 11m

Porto

Fri 10/10

10:00 am-9:56 pm

3 stops17h 56m

$1,746

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Milwaukee to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Milwaukee to Porto flights?

You could potentially save up to 28% on your flight if you consider stops on a Milwaukee to Porto flight.

When to book flights from Milwaukee to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Milwaukee to Porto according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Milwaukee to Porto (MKE to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Milwaukee to Porto

Direct flights	None

There are no direct flights from Milwaukee to Porto. There are no popular flight routes from Milwaukee to Porto.

Search flight deals

How far is Milwaukee-Mitchell to Porto by plane?
There are 3902.8 mi between Milwaukee-Mitchell and Porto. Flights usually cover this in 10h 39m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Porto Airport?
Prices for flights from Milwaukee-Mitchell Airport to Porto Airport refresh daily.
How old do you have to be to fly from Milwaukee-Mitchell Airport to Porto Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Vila Nova de Gaia

Aveiro

Coimbra

Braga

Matosinhos

Caminha

Guimarães

Lamego

Esposende

Chaves

Arcos de Valdevez

Espinho

Viseu

Ponte de Lima

Pinhao

Santa Maria da Feira

Curia

Penafiel

Mesao Frio

Baiao

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Why should I use momondo to find a flight deal from Milwaukee to Porto?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Milwaukee to Porto. momondo saves you time and could save you money on your trip.

Can I find flights from Milwaukee to Porto with flexible booking policies on momondo?

All flight searches from Milwaukee to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Milwaukee to Porto?

momondo helps you find the best flight between Milwaukee and Porto by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Milwaukee to Porto right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Milwaukee to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.