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Cheap flights from Milwaukee to Porto from $641

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Milwaukee to Porto departing on 6/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Milwaukee to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
7:00 am - 10:25 am
MKE
-
OPO
21h 25m
1 stop
KLM Logo
5:00 am - 4:02 pm
OPO
-
MKE
17h 02m
2 stops
$879KLM
Sun, Jul 5 - Tue, Jul 14
KLM Logo
7:00 am - 10:25 am
MKE
-
OPO
21h 25m
1 stop
KLM Logo
12:25 pm - 7:24 pm
OPO
-
MKE
12h 59m
1 stop
$883KLM
Sun, Jul 5 - Tue, Jul 14
United Airlines Logo
7:23 pm - 7:00 am
MKE
-
OPO
29h 37m
2 stops
United Airlines Logo
6:00 am - 6:48 pm
OPO
-
MKE
18h 48m
2 stops
$926United Airlines
Sun, Jul 5 - Tue, Jul 14
United Airlines Logo
10:53 am - 9:45 am
MKE
-
OPO
16h 52m
1 stop
United Airlines Logo
12:15 pm - 2:36 pm
OPO
-
MKE
32h 21m
2 stops
$927United Airlines
Tue, Jul 14 - Tue, Jul 21
United Airlines Logo
10:28 am - 6:15 am
MKE
-
OPO
13h 47m
2 stops
United Airlines Logo
12:15 pm - 2:36 pm
OPO
-
MKE
32h 21m
2 stops
$931United Airlines
Tue, Jul 14 - Tue, Jul 21
KLM Logo
6:45 am - 10:30 am
MKE
-
OPO
21h 45m
1 stop
KLM Logo
12:25 pm - 7:24 pm
OPO
-
MKE
12h 59m
1 stop
$942KLM
Tue, Jul 14 - Tue, Jul 21
Multiple Airlines Logo
7:23 pm - 7:00 am
MKE
-
OPO
29h 37m
2 stops
Multiple Airlines Logo
12:15 pm - 10:29 pm
OPO
-
MKE
16h 14m
3 stops
$959Multiple Airlines
Tue, Jul 14 - Tue, Jul 21
United Airlines Logo
10:53 am - 9:45 am
MKE
-
OPO
16h 52m
1 stop
United Airlines Logo
12:10 pm - 7:26 pm
OPO
-
MKE
37h 16m
2 stops
$961United Airlines
Wed, Jul 15 - Mon, Jul 27
United Airlines Logo
10:28 am - 6:55 am
MKE
-
OPO
14h 27m
2 stops
United Airlines Logo
12:10 pm - 7:26 pm
OPO
-
MKE
37h 16m
2 stops
$966United Airlines
Wed, Jul 15 - Mon, Jul 27
United Airlines Logo
10:53 am - 6:55 am
MKE
-
OPO
14h 02m
1 stop
United Airlines Logo
9:00 am - 6:26 pm
OPO
-
MKE
15h 26m
1 stop
$1,017United Airlines
Wed, Jul 15 - Mon, Jul 27

United Airlines flights from Milwaukee to Porto

Our best United Airlines deals on Milwaukee to Porto flight tickets
United Airlines
Jul 5
MKE7:23 pmMilwaukee-Mitchell
29h 37m
2 stops
OPO7:00 amPorto
Jul 14
OPO6:00 amPorto
18h 48m
2 stops
MKE6:48 pmMilwaukee-Mitchell
$926
United Airlines
Jul 14
MKE10:53 amMilwaukee-Mitchell
16h 52m
1 stop
OPO9:45 amPorto
Jul 21
OPO12:15 pmPorto
32h 21m
2 stops
MKE2:36 pmMilwaukee-Mitchell
$927
United Airlines
Jul 14
MKE10:28 amMilwaukee-Mitchell
13h 47m
2 stops
OPO6:15 amPorto
Jul 21
OPO12:15 pmPorto
32h 21m
2 stops
MKE2:36 pmMilwaukee-Mitchell
$931

KLM flights from Milwaukee to Porto

Our best KLM deals on Milwaukee to Porto flight tickets
KLM
Jul 5
MKE7:00 amMilwaukee-Mitchell
21h 25m
1 stop
OPO10:25 amPorto
Jul 14
OPO5:00 amPorto
17h 02m
2 stops
MKE4:02 pmMilwaukee-Mitchell
$879
KLM
Jul 5
MKE7:00 amMilwaukee-Mitchell
21h 25m
1 stop
OPO10:25 amPorto
Jul 14
OPO12:25 pmPorto
12h 59m
1 stop
MKE7:24 pmMilwaukee-Mitchell
$883
KLM
Jul 14
MKE6:45 amMilwaukee-Mitchell
21h 45m
1 stop
OPO10:30 amPorto
Jul 21
OPO12:25 pmPorto
12h 59m
1 stop
MKE7:24 pmMilwaukee-Mitchell
$942

momondo 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, momondo users made 832,500 searches. Data last updated May 19, 2026.
Use the filters below to find and compare flights from Milwaukee to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 7/5

7:00 am-10:25 am

1 stop21h 25m

Porto

Tue 7/14

5:00 am-4:02 pm

2 stops17h 02m

$879

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 7/5

7:00 am-10:25 am

1 stop21h 25m

Porto

Tue 7/14

12:25 pm-7:24 pm

1 stop12h 59m

$883

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 7/5

7:23 pm-7:00 am

2 stops29h 37m

Porto

Tue 7/14

6:00 am-6:48 pm

2 stops18h 48m

$926

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 7/14

10:53 am-9:45 am

1 stop16h 52m

Porto

Tue 7/21

12:15 pm-2:36 pm

2 stops32h 21m

$927

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 7/14

10:28 am-6:15 am

2 stops13h 47m

Porto

Tue 7/21

12:15 pm-2:36 pm

2 stops32h 21m

$931

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 7/14

6:45 am-10:30 am

1 stop21h 45m

Porto

Tue 7/21

12:25 pm-7:24 pm

1 stop12h 59m

$942

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 7/14

7:23 pm-7:00 am

2 stops29h 37m

Porto

Tue 7/21

12:15 pm-10:29 pm

3 stops16h 14m

$959

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 7/15

10:53 am-9:45 am

1 stop16h 52m

Porto

Mon 7/27

12:10 pm-7:26 pm

2 stops37h 16m

$961

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 7/15

10:28 am-6:55 am

2 stops14h 27m

Porto

Mon 7/27

12:10 pm-7:26 pm

2 stops37h 16m

$966
Quickest round-trip

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 7/15

10:53 am-6:55 am

1 stop14h 02m

Porto

Mon 7/27

9:00 am-6:26 pm

1 stop15h 26m

$1,017

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Porto from

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

Can stopping save me money on Milwaukee to Porto flights?

You could potentially save up to 44% 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

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from Milwaukee to Porto takes 12h 30m
There are no direct flights from Milwaukee to Porto. There are no popular flight routes from Milwaukee to Porto.
Search flight deals

Frequently asked questions about flying from Milwaukee to Porto

  • How far is Milwaukee-Mitchell to Porto by plane?

    There are 3902.8 mi between Milwaukee-Mitchell and Porto. Flights usually cover this in 12h 30m, 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.

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

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.

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