$338 Find Cheap Flights from Milwaukee to Portugal - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Milwaukee to Portugal departing on 10/28. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Milwaukee to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$733
Porto
Porto1 stop$827
Ponta Delgada
Ponta Delgada1 stop$871
Lisbon
Lisbon1 stop$733
Porto
Porto1 stop$827
Ponta Delgada
Ponta Delgada1 stop$871

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

Wed, Nov 25 - Thu, Dec 3
United Airlines Logo
11:06 am - 8:10 am
MKE
-
LIS
15h 04m
1 stop
United Airlines Logo
5:00 am - 4:35 pm
LIS
-
MKE
17h 35m
2 stops
$733United Airlines
Mon, Nov 23 - Tue, Dec 8
United Airlines Logo
11:06 am - 8:10 am
MKE
-
LIS
15h 04m
1 stop
United Airlines Logo
5:00 am - 10:39 pm
LIS
-
MKE
23h 39m
2 stops
$733United Airlines
Tue, Nov 24 - Thu, Dec 3
United Airlines Logo
6:00 am - 8:10 am
MKE
-
LIS
20h 10m
1 stop
United Airlines Logo
5:00 am - 4:35 pm
LIS
-
MKE
17h 35m
2 stops
$733United Airlines
Tue, Nov 24 - Tue, Dec 8
Air Canada Logo
8:00 am - 9:20 am
MKE
-
LIS
19h 20m
2 stops
Air Canada Logo
12:50 pm - 9:49 am
LIS
-
MKE
26h 59m
2 stops
$734Air Canada
Mon, Nov 23 - Fri, Dec 4
Air Canada Logo
8:00 am - 9:20 am
MKE
-
LIS
19h 20m
2 stops
Air Canada Logo
11:20 am - 10:39 pm
LIS
-
MKE
41h 19m
2 stops
$734Air Canada
Mon, Nov 23 - Thu, Nov 26
Multiple Airlines Logo
8:10 am - 8:00 am
MKE
-
LIS
17h 50m
1 stop
Multiple Airlines Logo
5:00 am - 7:29 pm
LIS
-
MKE
20h 29m
2 stops
$734Multiple Airlines
Mon, Nov 23 - Thu, Dec 3
Delta Logo
1:30 pm - 9:00 am
MKE
-
LIS
13h 30m
2 stops
Delta Logo
5:00 am - 4:57 pm
LIS
-
MKE
17h 57m
2 stops
$738Delta
Wed, Nov 25 - Thu, Dec 3
Delta Logo
1:16 pm - 11:20 am
MKE
-
LIS
16h 04m
2 stops
Delta Logo
5:00 am - 4:57 pm
LIS
-
MKE
17h 57m
2 stops
$738Delta
Mon, Nov 30 - Thu, Dec 3
American Airlines Logo
12:36 pm - 9:05 am
MKE
-
LIS
14h 29m
1 stop
American Airlines Logo
6:30 am - 7:58 pm
LIS
-
MKE
19h 28m
2 stops
$797American Airlines
Mon, Nov 30 - Thu, Dec 3
American Airlines Logo
10:46 am - 9:05 am
MKE
-
LIS
16h 19m
2 stops
American Airlines Logo
6:30 am - 7:58 pm
LIS
-
MKE
19h 28m
2 stops
$801American 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.

What is the cheapest month to fly from Milwaukee to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Milwaukee to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Milwaukee to Portugal is March, when tickets cost $595 (return) on average. On the other hand, the most expensive months are May and December, when the average cost of round-trip tickets is $1,885 and $1,824 respectively.

Good to know

Low season

March

Cheapest flight

$338
Best time to beat the crowds with an average 50% drop in price.
Most popular time to fly and prices are also 40% lower on average.
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 3 airlines serving 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.
7.8
DeltaOverall score based on 8497 reviews
7.8Comfort
8.5Crew
8.1Boarding
7.8Entertainment
7.2Food
Airline reviews

Comfortable seats. Nice service online. Short flight, so not a lot of time to enjoy.

8.0 ExcellentMichael, Jul 2026
SEA - SMF
Read more Delta reviews

Comfortable seats. Nice service online. Short flight, so not a lot of time to enjoy.

Awful. There was an unexpected delay of nearly three hours because there were not enough flight attendants. I understand this is likely due to FAA regulations; but in that case, Delta should coordinate with smaller airports such as RDU to have extra flight attendants on the ground and "on call". In addition, this was the second 2-hour+ delay to Boston on this route in one week.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Pretty standard flight. Delta has a good selection of movies.

Overall Delta was amazing from automatically booking us on the next flight once we missed our connection due to a delay to the constant communication throughout the entire process. We will continue to fly Delta going forward more and pay a little more if needed.

The flight was so late that I had to change connecting flights, turning a five-hour trip into a fourteen-hour nightmare.

Despite being delayed, we would still give a high score for this flight experience. For the first time in quite some time we had excellent customer service throughout our entire round trip. The flight attendants were the most polite we have experienced in our last ten flights at least (non of which were Delta and include business class). The food offered was a better selection than most—we just didn’t have any of it. Overall, almost as good as flying used to be. Thank you to Delta.

The flight crew were very helpful. The seats were very close together. There was barely room to sit without touching the person next to you.

Improve the food offerings and cabin seating. My wife would prefer to fly another airline, even with a connection for a more comfortable trip. A 737-8 should not be scheduled for a 6 hour segment, which turned into 7.5 hours due to the origin ground delay.

OK, I don’t expect much from coach class. Everything basically is pretty lousy. But at least I expect my bloody luggage to get from A to B. Tap Airlines lost my luggage and it has been more than 24 hours in Lisbon and they still have not located my luggage. On top of that, they are incredibly unhelpful. They feel actually dismissive. This lousy customer service.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

The seats on the aircraft are like sitting in a rock. During the boarding process they recognize Active Duty Military, why don’t they recognize Retired Military. I’ve always preferred Delta, this flight confirmed why I still prefer Delta.

It was literally one of the worst travel experiences ever. My flight got delayed by over an hour and there was no communication of this from the gate staff. I realized it by checking the screen periodically. Once on board the flight attendants continued to serve alcohol to a man who was clearly already drunk and that was making a bunch of commotion. Never again will I fly United!

At least the delays were short. Business class, even in the new planes is very crowded now with crappy tray tables

All good except paid for wifi that did not work

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

Everything was done like clockwork and I find no fault with the airline.

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.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

Bathroom ran out of TP and floor was wet. Crew seemed a bit unhappy, overnight flights may be harder.

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

There were several different delays but we ended up being delayed a total of 40 mins or so. It was annoying we had a gate change which made it take longer to leave DFW, and we had to check our carry on. Ugh

The counter/baggage counter was busy and so many people missed flights. We got stuck sitting on the plane over 2 hours at the gate while they were doing an inspection is wrong. Many of us missed our connecting flights because of it.

Our flight was changed from Madison to DC to Madison to Charlotte.

We were told we had no flights before our flight was continually delayed then cancelled.

Boarding was relatively fast and easy and the crew was attentive throughout.

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

Information on your arrival and departure airports