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$405+ Cheap flights from Madison (MSN) to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
MSN — OPO
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap flight deals from Madison to Porto

Cheapest flights from Madison to Porto
Explore the most affordable flight options available from Madison to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:30 pm
MSN
-
OPO
2 stops39h 45m
United Airlines
Wed 12/912:30 pm
OPO
-
MSN
2 stops17h 42m
United Airlines
Deal found 3/11$670
This Delta deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:25 pm
MSN
-
OPO
2 stops20h 00m
Delta
Tue 5/55:00 am
OPO
-
MSN
2 stops22h 15m
Delta
Deal found 3/14$683
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:30 am
MSN
-
OPO
2 stops18h 30m
United Airlines
Wed 8/192:25 pm
OPO
-
MSN
2 stops25h 19m
United Airlines
Deal found 3/15$732
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:40 am
MSN
-
OPO
2 stops14h 15m
United Airlines
Wed 8/1912:35 pm
OPO
-
MSN
2 stops16h 07m
United Airlines
Deal found 3/11$753
This Delta deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/163:50 pm
MSN
-
OPO
1 stop12h 35m
Delta
Mon 9/74:25 pm
OPO
-
MSN
2 stops33h 48m
Delta
Deal found 3/14$774
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/93:50 pm
MSN
-
OPO
1 stop12h 35m
Delta
Fri 8/215:00 am
OPO
-
MSN
2 stops18h 04m
Delta
Deal found 3/11$777
This Delta deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/101:45 pm
MSN
-
OPO
2 stops19h 40m
Delta
Fri 8/215:00 am
OPO
-
MSN
2 stops18h 04m
Delta
Deal found 3/11$781
This Delta deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:45 pm
MSN
-
OPO
2 stops19h 40m
Delta
Fri 8/215:55 am
OPO
-
MSN
2 stops20h 18m
Delta
Deal found 3/14$788

Find flight deals from Madison to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Madison (MSN) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 16, 2026.

Round-trip from

$683
(Delta)

One-way from

$405
(United Airlines)
From Madison Truax Field to Porto
Search Deals
One-way flight from Madison Truax Field to Porto
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Madison 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, Cheapflights users made 2,558,603 searches. Data last updated March 16, 2026.
Use the filters below to find and compare flights from Madison to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Wed 8/12

12:18 pm-6:55 am

2 stops12h 37m

Porto

Wed 8/19

12:35 pm-9:05 pm

2 stops14h 30m

$753

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Tue 8/11

10:49 am-6:55 am

2 stops14h 06m

Porto

Thu 8/20

9:00 am-7:05 pm

2 stops16h 05m

$753

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Tue 8/11

3:50 pm-10:30 am

1 stop12h 40m

Porto

Fri 8/21

5:00 am-5:04 pm

2 stops18h 04m

$777

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Wed 8/12

3:50 pm-10:30 am

1 stop12h 40m

Porto

Fri 8/21

5:00 am-5:04 pm

2 stops18h 04m

$777

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Sun 8/9

3:50 pm-10:25 am

1 stop12h 35m

Porto

Fri 8/21

5:00 am-5:04 pm

2 stops18h 04m

$777

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Mon 8/10

1:45 pm-3:25 pm

2 stops19h 40m

Porto

Fri 8/21

5:00 am-5:04 pm

2 stops18h 04m

$781

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Mon 8/10

2:35 pm-9:45 am

2 stops13h 10m

Porto

Sat 8/22

12:35 pm-10:42 pm

2 stops16h 07m

$813

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Sat 8/8

2:35 pm-9:45 am

2 stops13h 10m

Porto

Wed 8/19

12:35 pm-10:42 pm

2 stops16h 07m

$813

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Wed 8/12

9:26 am-6:55 am

2 stops15h 29m

Porto

Sat 8/22

12:35 pm-10:42 pm

2 stops16h 07m

$813

MadisonPorto

MSN - OPO

MSNOPO

Madison Truax Field

Sun 8/9

12:24 pm-6:55 am

2 stops12h 31m

Porto

Sun 8/23

12:15 pm-12:04 am

2 stops17h 49m

$816

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight from Madison to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Madison with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated March 16, 2026.
See what other customers who have flown with Delta and KLM from Madison to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,292 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,292 reviews
Delta
7.9
Good
8,292 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.8
Good
1,471 reviews
Delta
7.9
Good
8,292 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Overall

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Madison to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Madison to Porto?

    For as low as $753, United Airlines can have you in Porto from Madison in 12h 37m. The distance between Madison and Porto is about 3958 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Madison to Porto round-trip?

    According to our current data, KLM ($700), and Delta ($711) offers the cheapest pricing from Madison to Porto.

  • Can I find deals for flights from Madison to Porto that include hotel bookings?

    Yes. In addition to deals on Madison to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Madison to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Madison to Porto.

  • Can I find deals for business class flights from Madison to Porto?

    Yes. Cheapflights offers flight deals from Madison to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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Top 2 airlines flying from Madison to Porto

Discover the top 2 airlines that operate flights from Madison to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$700Average$846FlexibilityNo cancel feeOn-time75%
DeltaCheapest$711Average$842FlexibilityNo cancel feeOn-timeN/A

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