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Portugal

$554+ Cheap flights from Louisville (SDF) to Portugal

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Louisville to Portugal

Keep the following information in mind while searching for Louisville to Portugal flight deals. Data was last updated September 15, 2025.

Round-trip from

$554
(United Airlines)

Popular in

September

Cheapest in

December

Average price

$1,408
From Louisville Intl to Portugal
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($186 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Louisville to Portugal

Cheapest flights from Louisville to Portugal
Explore the most affordable flight options available from Louisville to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/15. 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 11/109:00 amSDF - LIS
2 stops43h 20mUnited Airlines
Wed 11/195:00 amLIS - SDF
2 stops20h 44mUnited Airlines
Deal found 9/15$554
This American Airlines deal was found by Cheapflights users on 9/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/294:28 pmSDF - LIS
2 stops15h 42mAmerican Airlines
Wed 11/56:30 amLIS - SDF
2 stops18h 49mAmerican Airlines
Deal found 9/13$557
This KAYAK deal was found by Cheapflights users on 9/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:09 pmSDF - LIS
2 stops25h 21mScandinavian Airlines
Wed 11/194:55 pmLIS - SDF
2 stops36h 11mScandinavian Airlines
Deal found 9/13$579
This Ovago deal was found by Cheapflights users on 9/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:20 pmSDF - LIS
2 stops23h 35mBritish Airways
Thu 11/208:45 pmLIS - SDF
2 stops29h 44mBritish Airways
Deal found 9/15$582
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/109:00 amSDF - LIS
2 stops43h 20mUnited Airlines
Thu 11/2010:15 amLIS - SDF
1 stop13h 37mUnited Airlines
Deal found 9/14$617
This United Airlines deal was found by Cheapflights users on 9/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:45 amSDF - LIS
2 stops21h 20mUnited Airlines
Wed 10/2911:55 amLIS - SDF
2 stops29h 30mUnited Airlines
Deal found 9/14$642
This Booking.com deal was found by Cheapflights users on 9/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:57 pmSDF - LIS
2 stops34h 23mMultiple Airlines
Sun 11/165:00 amLIS - SDF
2 stops22h 29mMultiple Airlines
Deal found 9/14$653

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville 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, Cheapflights users made 2,558,603 searches. Data last updated September 15, 2025.
Use the filters below to find and compare flights from Louisville to Portugal that are best for you.

Fly from

Louisville

Fly to

Portugal

Route

Depart

Return

Price

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

9:00 am-9:20 am

2 stops43h 20m

Lisbon Humberto Delgado

Thu 11/20

5:00 am-8:44 pm

2 stops20h 44m

$554

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/29

4:28 pm-12:10 pm

2 stops15h 42m

Lisbon Humberto Delgado

Wed 11/5

6:30 am-8:19 pm

2 stops18h 49m

$557

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

9:00 am-9:20 am

2 stops43h 20m

Lisbon Humberto Delgado

Wed 11/19

10:15 am-6:52 pm

1 stop13h 37m

$560

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/9

2:10 pm-10:15 am

2 stops16h 05m

Lisbon Humberto Delgado

Mon 3/23

5:00 am-10:09 pm

2 stops45h 09m

$572

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

3:09 pm-9:30 pm

2 stops25h 21m

Lisbon Humberto Delgado

Wed 11/19

4:55 pm-12:06 am

2 stops36h 11m

$579

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 10/21

9:55 am-9:20 am

2 stops18h 25m

Lisbon Humberto Delgado

Wed 10/29

11:55 am-1:25 pm

2 stops29h 30m

$579

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

5:20 pm-9:55 pm

2 stops23h 35m

Lisbon Humberto Delgado

Thu 11/20

8:45 pm-9:29 pm

2 stops29h 44m

$582

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/9

6:26 pm-9:05 am

1 stop10h 39m

Lisbon Humberto Delgado

Mon 3/23

11:05 am-10:38 am

1 stop27h 33m

$611

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/1

6:12 pm-5:55 pm

2 stops18h 43m

$3,683

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/1

2:03 pm-10:30 am

1 stop15h 27m

$6,850

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 11 results
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Best time to book a flight from Louisville to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Louisville 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.

Cheapflights Insights

Everything you need to know about your flight from Louisville to Portugal

What is the cheapest month to book a flight from Louisville to Portugal?

Currently, January is the cheapest month in which you can book a flight from Louisville to Portugal (average of $612). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,127). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SDF to PT?

Find hourly flight availability from Louisville to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Louisville to Portugal as you normally would.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated September 15, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Lufthansa from Louisville to Portugal to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,407 reviews
United Airlines
7.4
Good
8,929 reviews

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

  • What airport do you fly from for flights from Louisville to Portugal?

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to Portugal. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • How long is the flight from Louisville to Portugal?

    There are many flights that can get you from Louisville to Portugal in 15h 42m. Fly via United Airlines, American Airlines, or Scandinavian Airlines to get the fastest option. Airlines will cover a distance of 4008 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Louisville to Portugal that include hotel bookings?

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

  • How can I find direct flights from Louisville to Portugal?

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

  • Can I find deals for business class flights from Louisville to Portugal?

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

  • What is the cheapest month to book a flight from Louisville to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Louisville to Portugal (average of $612). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,127). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from Louisville to Portugal

Discover the top 3 airlines that operate flights from Louisville to Portugal. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$603Average$988FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$618Average$1,007FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$1,014Average$1,780FlexibilityNo cancel feeOn-time76%

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