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Cheap flights from Milwaukee to Portugal from $344

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 Portugal departing on 10/19. 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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0 bags

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Find the cheapest flights from Milwaukee to Portugal

Cheap round-trip flights

Scandinavian Airlines Logo
7:00 am - 9:35 pmMKE-LIS
32h 35m2 stops
Scandinavian Airlines Logo
6:45 am - 8:12 pmLIS-MKE
19h 27m2 stops
$505Scandinavian Airlines
Find Deal
Wed, Jan 14 - Mon, Feb 9
Scandinavian Airlines Logo
7:00 am - 8:55 amMKE-LIS
43h 55m2 stops
Scandinavian Airlines Logo
4:55 pm - 8:12 pmLIS-MKE
33h 17m2 stops
$535Scandinavian Airlines
Find Deal
Wed, Jan 14 - Sun, Jan 18
United Airlines Logo
7:00 am - 9:30 amMKE-OPO
20h 30m2 stops
United Airlines Logo
12:35 pm - 10:09 pmOPO-MKE
14h 34m2 stops
$597United Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 18
United Airlines Logo
6:05 am - 9:20 amMKE-LIS
21h 15m2 stops
United Airlines Logo
5:00 am - 4:32 pmLIS-MKE
17h 32m2 stops
$598United Airlines
Find Deal
Tue, Nov 4 - Tue, Nov 11
American Airlines Logo
6:41 pm - 5:40 pmMKE-LIS
16h 59m2 stops
American Airlines Logo
11:05 am - 9:53 amLIS-MKE
28h 48m1 stop
$615American Airlines
Find Deal
Wed, Jan 14 - Mon, Feb 9
United Airlines Logo
3:49 pm - 1:20 pmMKE-LIS
15h 31m2 stops
United Airlines Logo
5:00 am - 5:17 pmLIS-MKE
18h 17m2 stops
$621United Airlines
Find Deal
Mon, Nov 3 - Tue, Nov 11
Lufthansa Logo
1:25 pm - 11:40 amMKE-OPO
16h 15m2 stops
Lufthansa Logo
6:00 am - 4:35 pmOPO-MKE
15h 35m2 stops
$623Lufthansa
Find Deal
Tue, Mar 3 - Fri, Mar 13
American Airlines Logo
11:33 am - 7:40 amMKE-LIS
15h 07m2 stops
American Airlines Logo
6:30 am - 6:27 pmLIS-MKE
17h 57m2 stops
$628American Airlines
Find Deal
Thu, Oct 30 - Thu, Nov 6
Lufthansa Logo
11:39 am - 2:45 pmMKE-OPO
21h 06m2 stops
Lufthansa Logo
1:45 pm - 10:09 pmOPO-MKE
37h 24m2 stops
$635Lufthansa
Find Deal
Tue, Mar 3 - Mon, Mar 16
Delta Logo
1:10 pm - 3:30 pmMKE-OPO
20h 20m2 stops
Delta Logo
6:15 am - 11:55 pmOPO-MKE
22h 40m2 stops
$962Delta
Find Deal
Thu, Oct 16 - Sun, Oct 26

United Airlines flights from Milwaukee to Portugal

Our best United Airlines deals on Milwaukee to Portugal flight tickets
United Airlines
Mar 3
MKE7:00 amMilwaukee-Mitchell
20h 30m
2 stops
OPO9:30 amPorto
Mar 18
OPO12:35 pmPorto
14h 34m
2 stops
MKE10:09 pmMilwaukee-Mitchell
$597
Find similar
United Airlines
Nov 4
MKE6:05 amMilwaukee-Mitchell
21h 15m
2 stops
LIS9:20 amLisbon Humberto Delgado
Nov 11
LIS5:00 amLisbon Humberto Delgado
17h 32m
2 stops
MKE4:32 pmMilwaukee-Mitchell
$598
Find similar
United Airlines
Nov 3
MKE3:49 pmMilwaukee-Mitchell
15h 31m
2 stops
LIS1:20 pmLisbon Humberto Delgado
Nov 11
LIS5:00 amLisbon Humberto Delgado
18h 17m
2 stops
MKE5:17 pmMilwaukee-Mitchell
$621
Find similar

Lufthansa flights from Milwaukee to Portugal

Our best Lufthansa deals on Milwaukee to Portugal flight tickets
Lufthansa
Mar 3
MKE1:25 pmMilwaukee-Mitchell
16h 15m
2 stops
OPO11:40 amPorto
Mar 13
OPO6:00 amPorto
15h 35m
2 stops
MKE4:35 pmMilwaukee-Mitchell
$623
Find similar
Lufthansa
Mar 3
MKE11:39 amMilwaukee-Mitchell
21h 06m
2 stops
OPO2:45 pmPorto
Mar 16
OPO1:45 pmPorto
37h 24m
2 stops
MKE10:09 pmMilwaukee-Mitchell
$635
Find similar
Lufthansa
Nov 4
MKE5:52 pmMilwaukee-Mitchell
23h 38m
2 stops
LIS11:30 pmLisbon Humberto Delgado
Nov 10
LIS3:55 pmLisbon Humberto Delgado
30h 37m
2 stops
MKE4:32 pmMilwaukee-Mitchell
$645
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Milwaukee to Portugal 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 September 16, 2025.
Use the filters below to find and compare flights from Milwaukee to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 1/14

7:00 am-9:35 pm

2 stops32h 35m

Lisbon Humberto Delgado

Mon 2/9

6:45 am-8:12 pm

2 stops19h 27m

$505

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 1/14

7:00 am-8:55 am

2 stops43h 55m

Lisbon Humberto Delgado

Sun 1/18

4:55 pm-8:12 pm

2 stops33h 17m

$535

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/3

7:00 am-9:30 am

2 stops20h 30m

Porto

Wed 3/18

12:35 pm-10:09 pm

2 stops14h 34m

$597

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Tue 11/4

6:05 am-9:20 am

2 stops21h 15m

Lisbon Humberto Delgado

Tue 11/11

5:00 am-4:32 pm

2 stops17h 32m

$598

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Wed 1/14

6:41 pm-5:40 pm

2 stops16h 59m

Lisbon Humberto Delgado

Mon 2/9

11:05 am-9:53 am

1 stop28h 48m

$615

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Mon 11/3

3:49 pm-1:20 pm

2 stops15h 31m

Lisbon Humberto Delgado

Tue 11/11

5:00 am-5:17 pm

2 stops18h 17m

$621

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/3

1:25 pm-11:40 am

2 stops16h 15m

Porto

Fri 3/13

6:00 am-4:35 pm

2 stops15h 35m

$623

MilwaukeeLisbon

MKE - LIS

MKELIS

Milwaukee-Mitchell

Thu 10/30

11:33 am-7:40 am

2 stops15h 07m

Lisbon Humberto Delgado

Thu 11/6

6:30 am-6:27 pm

2 stops17h 57m

$628

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Tue 3/3

11:39 am-2:45 pm

2 stops21h 06m

Porto

Mon 3/16

1:45 pm-10:09 pm

2 stops37h 24m

$635

MilwaukeePorto

MKE - OPO

MKEOPO

Milwaukee-Mitchell

Thu 10/16

1:10 pm-3:30 pm

2 stops20h 20m

Porto

Sun 10/26

6:15 am-11:55 pm

2 stops22h 40m

$962

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Milwaukee to Portugal

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

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Milwaukee is in November. Flight prices, which tend to average around $659, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Milwaukee during February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $830.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Sunday is the cheapest day to fly to Portugal from Milwaukee. The lowest ticket price found for a Sunday departure recently was $911. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $1,186.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is at noon. Flights from Milwaukee to Portugal during this time can be as low as $905. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,072 per ticket.

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Milwaukee when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $1,160 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Milwaukee for as low as $734 on momondo.

Can stopping save me money on Milwaukee to Portugal flights?

You could potentially save up to 38% on your flight if you consider stops on a Milwaukee to Portugal flight.

Cheap Milwaukee to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Milwaukee to Portugal

Direct flights

None
There are no direct flights from Milwaukee to Portugal. There are no popular flight routes from Milwaukee to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Milwaukee-Mitchell Airport to Portugal?

    Prices for flights from Milwaukee-Mitchell Airport to Portugal are updated daily.

  • How many operators does momondo search for flights from Milwaukee-Mitchell Airport to Portugal?

  • How old do you have to be to fly from Milwaukee-Mitchell Airport to Portugal?

    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 Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The necessary travel and health documents for your Portugal trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Milwaukee to Portugal

Compare and see reviews for airlines that fly from Milwaukee to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $555Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
KLMPriceFrom $604Free CancellationRating
7.8
1,386 reviews
Search KLM flights
DeltaPriceFrom $699Free CancellationRating
7.9
7,957 reviews
Search Delta flights
American AirlinesPriceFrom $703Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Milwaukee to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Milwaukee to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Milwaukee to Portugal with flexible booking policies on momondo?

All flight searches from Milwaukee to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Milwaukee to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Milwaukee to Portugal.

I’m not ready to book a flight from Milwaukee to Portugal right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Milwaukee to Portugal 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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Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $358
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