$499 Find Cheap Flights from Milwaukee to Portugal

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Milwaukee to Portugal departing on 2/28. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Milwaukee to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$499
Porto
Porto2 stops$656
Ponta Delgada
Ponta Delgada2 stops$1,264
Lisbon
Lisbon1 stop$499
Porto
Porto2 stops$656
Ponta Delgada
Ponta Delgada2 stops$1,264

Book Cheap Milwaukee to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Milwaukee to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Milwaukee to Portugal

Sat, Feb 28 - Sat, Mar 7
Delta Logo
7:00 am - 9:00 am
MKE
-
LIS
20h 00m
1 stop
Delta Logo
5:00 am - 6:11 pm
LIS
-
MKE
19h 11m
2 stops
$499Delta
Sat, Feb 28 - Sat, Mar 7
United Airlines Logo
7:00 am - 8:10 am
MKE
-
LIS
19h 10m
2 stops
United Airlines Logo
5:00 am - 6:43 pm
LIS
-
MKE
19h 43m
2 stops
$501United Airlines
Tue, Apr 28 - Fri, May 8
Delta Logo
7:10 am - 8:50 am
MKE
-
LIS
19h 40m
2 stops
Delta Logo
5:00 am - 6:00 pm
LIS
-
MKE
19h 00m
2 stops
$502Delta
Sat, Feb 28 - Mon, Mar 9
United Airlines Logo
1:25 pm - 8:10 am
MKE
-
LIS
12h 45m
2 stops
United Airlines Logo
6:10 am - 5:38 pm
LIS
-
MKE
16h 28m
2 stops
$503United Airlines
Sun, Apr 26 - Thu, May 7
Delta Logo
7:10 am - 8:00 am
MKE
-
LIS
18h 50m
1 stop
Delta Logo
5:35 am - 7:39 pm
LIS
-
MKE
20h 04m
2 stops
$505Delta
Sat, Feb 28 - Sun, Mar 8
Lufthansa Logo
4:00 pm - 3:05 pm
MKE
-
LIS
41h 05m
2 stops
Lufthansa Logo
12:15 pm - 5:38 pm
LIS
-
MKE
34h 23m
2 stops
$518Lufthansa
Sat, May 2 - Fri, May 8
Lufthansa Logo
1:46 pm - 10:15 pm
MKE
-
LIS
26h 29m
2 stops
Lufthansa Logo
2:30 pm - 5:07 pm
LIS
-
MKE
32h 37m
2 stops
$530Lufthansa
Fri, May 1 - Sun, May 10
Iberia Logo
11:21 am - 11:45 am
MKE
-
OPO
18h 24m
2 stops
Iberia Logo
8:20 am - 6:25 pm
OPO
-
MKE
16h 05m
2 stops
$759Iberia
Wed, Feb 25 - Wed, Mar 4
Brussels Airlines Logo
11:39 am - 9:30 am
MKE
-
OPO
15h 51m
1 stop
Brussels Airlines Logo
12:35 pm - 10:18 am
OPO
-
MKE
27h 43m
1 stop
$909Brussels Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
11:39 am - 8:15 am
MKE
-
PDL
15h 36m
2 stops
Multiple Airlines Logo
8:30 am - 10:18 am
PDL
-
MKE
29h 48m
2 stops
$1,264Multiple Airlines
Booking Insights

KAYAK's insights & trends for Milwaukee to Portugal flights

Get data-powered insights and trends into flights from Milwaukee to Portugal to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Milwaukee to Portugal?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Milwaukee to Portugal were found on Delta ($499) and United Airlines ($503).

Good to know

Cheapest flight$499
Most popular time to fly with an average 24% increase in price.
Flight from Milwaukee to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Milwaukee to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Milwaukee to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Milwaukee to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Milwaukee to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Milwaukee to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Milwaukee to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Milwaukee to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Milwaukee to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Milwaukee to Portugal

 
Need help choosing which airline to fly with from Milwaukee to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9222 reviews
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
7.7Boarding
Airline reviews

The attendant on board was amazing. She should be doing business/first international long haul.

10.0 ExcellentJeremy, Feb 2026
EWR - BTV
Read more United Airlines reviews

The attendant on board was amazing. She should be doing business/first international long haul.

Although our flight was delayed the overall boarding process was very smooth and the crew was accommodating.

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

It would be nice to have some low carb options in the snacks.

I was trying to take 2 one and a half hour one way trips and I experienced almost 20 delays over the course of those two trips. Only a few of them were due to weather the rest was disorganization

No gates avail at DFW so our incoming had to wait 30 mins for a plane to push back because they Had mechanical. We boarded 90 mins delayed and then we had a mechanical. Come on American…do better. Also at my seat the tray table had not been cleaned. Floor had not been cleaned. But captain and flight Att were very picture and apologetic.

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

Flight was canceled. I asked to be rerouted to OKC and then took an Uber.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

Everything you need to know for your flight from Milwaukee to Portugal

Information on your arrival and departure airports