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Cheap flights from Milwaukee to Porto from $876

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Milwaukee to Porto departing on 9/27. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Milwaukee to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
8:11 am - 10:25 am
MKE
-
OPO
20h 14m
1 stop
Delta Logo
5:00 am - 8:31 pm
OPO
-
MKE
21h 31m
2 stops
$876Delta
Sun, Sep 27 - Fri, Oct 9
Delta Logo
8:11 am - 10:25 am
MKE
-
OPO
20h 14m
1 stop
Delta Logo
11:45 am - 11:53 pm
OPO
-
MKE
18h 08m
2 stops
$877Delta
Sun, Sep 20 - Wed, Oct 7
Delta Logo
3:59 pm - 3:25 pm
MKE
-
OPO
17h 26m
2 stops
Delta Logo
5:00 am - 5:58 pm
OPO
-
MKE
18h 58m
2 stops
$880Delta
Tue, Sep 22 - Fri, Oct 9
Delta Logo
4:57 pm - 3:25 pm
MKE
-
OPO
16h 28m
2 stops
Delta Logo
11:45 am - 11:53 pm
OPO
-
MKE
18h 08m
2 stops
$881Delta
Tue, Sep 22 - Wed, Oct 7
Delta Logo
6:45 am - 10:30 am
MKE
-
OPO
21h 45m
1 stop
Delta Logo
5:00 am - 8:18 pm
OPO
-
MKE
21h 18m
2 stops
$882Delta
Mon, Aug 10 - Wed, Aug 19
Delta Logo
8:11 am - 10:25 am
MKE
-
OPO
20h 14m
1 stop
Delta Logo
5:55 am - 5:58 pm
OPO
-
MKE
18h 03m
2 stops
$883Delta
Sun, Sep 20 - Thu, Oct 8
Delta Logo
8:11 am - 10:25 am
MKE
-
OPO
20h 14m
1 stop
Delta Logo
5:55 am - 5:58 pm
OPO
-
MKE
18h 03m
2 stops
$884Delta
Sun, Sep 27 - Thu, Oct 8
Delta Logo
6:59 pm - 7:10 pm
MKE
-
OPO
18h 11m
2 stops
Delta Logo
5:00 am - 3:09 pm
OPO
-
MKE
16h 09m
2 stops
$885Delta
Sun, Aug 9 - Wed, Aug 19
Delta Logo
3:59 pm - 3:25 pm
MKE
-
OPO
17h 26m
2 stops
Delta Logo
5:55 am - 5:58 pm
OPO
-
MKE
18h 03m
2 stops
$887Delta
Tue, Sep 22 - Thu, Oct 8
Delta Logo
1:28 pm - 3:25 pm
MKE
-
OPO
19h 57m
2 stops
Delta Logo
12:40 pm - 8:35 pm
OPO
-
MKE
13h 55m
1 stop
$888Delta
Tue, Sep 22 - Wed, Oct 7

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KLM flights from Milwaukee to Porto

Our best KLM deals on Milwaukee to Porto flight tickets
KLM
Aug 10
MKE6:45 amMilwaukee-Mitchell
21h 45m
1 stop
OPO10:30 amPorto
Aug 19
OPO12:40 pmPorto
12h 44m
1 stop
MKE7:24 pmMilwaukee-Mitchell
$891
KLM
Aug 9
MKE6:48 pmMilwaukee-Mitchell
14h 42m
2 stops
OPO3:30 pmPorto
Aug 19
OPO12:40 pmPorto
12h 44m
1 stop
MKE7:24 pmMilwaukee-Mitchell
$942

United Airlines flights from Milwaukee to Porto

Our best United Airlines deals on Milwaukee to Porto flight tickets
United Airlines
Aug 19
MKE11:40 amMilwaukee-Mitchell
13h 15m
1 stop
OPO6:55 amPorto
Aug 26
OPO11:20 amPorto
18h 17m
2 stops
MKE11:37 pmMilwaukee-Mitchell
$911
United Airlines
Aug 19
MKE6:15 amMilwaukee-Mitchell
18h 45m
2 stops
OPO7:00 amPorto
Aug 26
OPO11:20 amPorto
18h 17m
2 stops
MKE11:37 pmMilwaukee-Mitchell
$914
United Airlines
Aug 10
MKE10:53 amMilwaukee-Mitchell
14h 02m
1 stop
OPO6:55 amPorto
Aug 18
OPO6:00 amPorto
38h 33m
2 stops
MKE2:33 pmMilwaukee-Mitchell
$920

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 July 7, 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 9/27

8:11 am-10:25 am

1 stop20h 14m

Porto

Fri 10/9

5:00 am-8:31 pm

2 stops21h 31m

$876

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 9/20

8:11 am-10:25 am

1 stop20h 14m

Porto

Wed 10/7

11:45 am-11:53 pm

2 stops18h 08m

$877

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 9/22

3:59 pm-3:25 pm

2 stops17h 26m

Porto

Fri 10/9

5:00 am-5:58 pm

2 stops18h 58m

$880

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 9/22

4:57 pm-3:25 pm

2 stops16h 28m

Porto

Wed 10/7

11:45 am-11:53 pm

2 stops18h 08m

$881

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Mon 8/10

6:45 am-10:30 am

1 stop21h 45m

Porto

Wed 8/19

5:00 am-8:18 pm

2 stops21h 18m

$882

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 9/20

8:11 am-10:25 am

1 stop20h 14m

Porto

Thu 10/8

5:55 am-5:58 pm

2 stops18h 03m

$883

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 9/27

8:11 am-10:25 am

1 stop20h 14m

Porto

Thu 10/8

5:55 am-5:58 pm

2 stops18h 03m

$884

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 8/9

6:59 pm-7:10 pm

2 stops18h 11m

Porto

Wed 8/19

5:00 am-3:09 pm

2 stops16h 09m

$885

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 9/22

3:59 pm-3:25 pm

2 stops17h 26m

Porto

Thu 10/8

5:55 am-5:58 pm

2 stops18h 03m

$887
Quickest round-trip

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 9/22

1:28 pm-3:25 pm

2 stops19h 57m

Porto

Wed 10/7

12:40 pm-8:35 pm

1 stop13h 55m

$888

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 48% 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

13h 15m

Direct flights

None
The fastest flight from Milwaukee to Porto takes 13h 15m
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 13h 15m, 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
Esposende
Lamego
Chaves
Pinhao
Arcos de Valdevez
Guimarães
Espinho
Ponte de Lima
Viseu
Curia
Mesao Frio
Penafiel
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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