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Cheap flights from Milwaukee to Porto from $637

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 3/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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United Airlines Logo
11:30 am - 9:30 amMKE-OPO
16h 00m2 stops
United Airlines Logo
6:00 am - 5:48 pmOPO-MKE
17h 48m2 stops
$637United Airlines
Find Deal
Wed, Mar 4 - Sun, Mar 8
Lufthansa Logo
11:39 am - 9:30 amMKE-OPO
15h 51m1 stop
Lufthansa Logo
6:00 am - 5:48 pmOPO-MKE
17h 48m2 stops
$833Lufthansa
Find Deal
Wed, Mar 4 - Sun, Mar 8

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 November 4, 2025.
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 3/4

11:30 am-9:30 am

2 stops16h 00m

Porto

Sun 3/8

6:00 am-5:48 pm

2 stops17h 48m

$637

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Wed 3/4

11:39 am-9:30 am

1 stop15h 51m

Porto

Sun 3/8

6:00 am-5:48 pm

2 stops17h 48m

$833

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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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

Direct flights

None
There are no direct flights from Milwaukee to Porto. There are no popular flight routes from Milwaukee to Porto.
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  • 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 51m, 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
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
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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