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Cheap flights from Milwaukee to Porto from $393

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 5/3. 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.
Lufthansa Logo
11:00 am - 3:25 pm
MKE
-
OPO
23h 25m
2 stops
Lufthansa Logo
4:15 pm - 9:50 pm
OPO
-
MKE
58h 35m
2 stops
$529Lufthansa
Wed, Mar 11 - Tue, Mar 24
Delta Logo
7:00 am - 10:30 am
MKE
-
OPO
22h 30m
2 stops
Delta Logo
5:00 am - 8:06 pm
OPO
-
MKE
21h 06m
2 stops
$530Delta
Wed, Mar 18 - Tue, Mar 31
United Airlines Logo
5:51 pm - 9:30 am
MKE
-
OPO
10h 39m
1 stop
United Airlines Logo
6:00 am - 9:49 pm
OPO
-
MKE
21h 49m
2 stops
$593United Airlines
Wed, Mar 18 - Tue, Mar 31
Lufthansa Logo
5:51 pm - 9:30 am
MKE
-
OPO
10h 39m
1 stop
Lufthansa Logo
12:30 pm - 5:38 pm
OPO
-
MKE
34h 08m
2 stops
$653Lufthansa
Wed, Mar 11 - Tue, Mar 24
Delta Logo
1:21 pm - 10:30 am
MKE
-
OPO
15h 09m
2 stops
Delta Logo
5:00 am - 8:36 pm
OPO
-
MKE
21h 36m
2 stops
$655Delta
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
7:00 am - 9:30 am
MKE
-
OPO
20h 30m
2 stops
United Airlines Logo
6:00 am - 7:45 pm
OPO
-
MKE
19h 45m
2 stops
$688United Airlines
Wed, Mar 4 - Sun, Mar 8
Lufthansa Logo
11:39 am - 9:30 am
MKE
-
OPO
15h 51m
1 stop
Lufthansa Logo
12:30 pm - 10:28 pm
OPO
-
MKE
15h 58m
2 stops
$728Lufthansa
Wed, Feb 25 - Wed, Mar 4
KLM Logo
7:06 am - 10:30 am
MKE
-
OPO
21h 24m
1 stop
KLM Logo
5:00 am - 4:06 pm
OPO
-
MKE
17h 06m
2 stops
$971KLM
Sun, May 24 - Thu, Jun 4
Delta Logo
5:00 pm - 3:25 pm
MKE
-
OPO
16h 25m
2 stops
Delta Logo
5:00 am - 4:06 pm
OPO
-
MKE
17h 06m
2 stops
$975Delta
Sun, May 24 - Thu, Jun 4
KLM Logo
7:06 am - 10:30 am
MKE
-
OPO
21h 24m
1 stop
KLM Logo
12:25 pm - 9:52 pm
OPO
-
MKE
15h 27m
1 stop
$978KLM
Sun, May 24 - Thu, Jun 4

Lufthansa flights from Milwaukee to Porto

Our best Lufthansa deals on Milwaukee to Porto flight tickets
Lufthansa
Mar 11
MKE11:00 amMilwaukee-Mitchell
23h 25m
2 stops
OPO3:25 pmPorto
Mar 24
OPO4:15 pmPorto
58h 35m
2 stops
MKE9:50 pmMilwaukee-Mitchell
$529
Lufthansa
Mar 11
MKE5:51 pmMilwaukee-Mitchell
10h 39m
1 stop
OPO9:30 amPorto
Mar 24
OPO12:30 pmPorto
34h 08m
2 stops
MKE5:38 pmMilwaukee-Mitchell
$653
Lufthansa
Feb 25
MKE11:39 amMilwaukee-Mitchell
15h 51m
1 stop
OPO9:30 amPorto
Mar 4
OPO12:30 pmPorto
15h 58m
2 stops
MKE10:28 pmMilwaukee-Mitchell
$728

KLM flights from Milwaukee to Porto

Our best KLM deals on Milwaukee to Porto flight tickets
KLM
May 24
MKE7:06 amMilwaukee-Mitchell
21h 24m
1 stop
OPO10:30 amPorto
Jun 4
OPO5:00 amPorto
17h 06m
2 stops
MKE4:06 pmMilwaukee-Mitchell
$971
KLM
May 24
MKE7:06 amMilwaukee-Mitchell
21h 24m
1 stop
OPO10:30 amPorto
Jun 4
OPO12:25 pmPorto
15h 27m
1 stop
MKE9:52 pmMilwaukee-Mitchell
$978

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 February 8, 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

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/11

11:00 am-3:25 pm

2 stops23h 25m

Porto

Tue 3/24

4:15 pm-9:50 pm

2 stops58h 35m

$529

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/18

7:00 am-10:30 am

2 stops22h 30m

Porto

Tue 3/31

5:00 am-8:06 pm

2 stops21h 06m

$530

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/18

5:51 pm-9:30 am

1 stop10h 39m

Porto

Tue 3/31

6:00 am-9:49 pm

2 stops21h 49m

$593

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/11

5:51 pm-9:30 am

1 stop10h 39m

Porto

Tue 3/24

12:30 pm-5:38 pm

2 stops34h 08m

$653

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 2/25

1:21 pm-10:30 am

2 stops15h 09m

Porto

Wed 3/4

5:00 am-8:36 pm

2 stops21h 36m

$655

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/4

7:00 am-9:30 am

2 stops20h 30m

Porto

Sun 3/8

6:00 am-7:45 pm

2 stops19h 45m

$688

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 2/25

11:39 am-9:30 am

1 stop15h 51m

Porto

Wed 3/4

12:30 pm-10:28 pm

2 stops15h 58m

$728

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/24

7:06 am-10:30 am

1 stop21h 24m

Porto

Thu 6/4

5:00 am-4:06 pm

2 stops17h 06m

$971

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/24

5:00 pm-3:25 pm

2 stops16h 25m

Porto

Thu 6/4

5:00 am-4:06 pm

2 stops17h 06m

$975

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Sun 5/24

7:06 am-10:30 am

1 stop21h 24m

Porto

Thu 6/4

12:25 pm-9:52 pm

1 stop15h 27m

$978

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 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

Fastest flight time

15h 09m

Direct flights

None
The fastest flight from Milwaukee to Porto takes 15h 09m
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 15h 09m, 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
Guimarães
Espinho
Chaves
Pinhao
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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