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Portugal

$401+ Cheap flights from Louisville (SDF) to Portugal

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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Delta deal was found by Cheapflights users on 10/30. 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.
Wed 12/34:31 pmSDF - LIS
1 stop10h 29mDelta
Sun 12/75:30 amLIS - SDF
2 stops18h 22mDelta
Deal found 10/30$502
This Booking.com deal was found by Cheapflights users on 10/29. 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.
Wed 11/266:07 pmSDF - LIS
2 stops34h 13mMultiple Airlines
Wed 12/35:00 amLIS - SDF
2 stops23h 32mMultiple Airlines
Deal found 10/29$532
This United Airlines deal was found by Cheapflights users on 10/29. 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 stops18h 10mUnited Airlines
Wed 11/195:00 amLIS - SDF
2 stops20h 44mUnited Airlines
Deal found 10/29$546
This Air France deal was found by Cheapflights users on 10/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/103:09 pmSDF - LIS
2 stops15h 11mMultiple Airlines
Wed 11/1911:25 amLIS - SDF
2 stops17h 41mMultiple Airlines
Deal found 10/30$549
This United Airlines deal was found by Cheapflights users on 10/30. 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 12/32:05 pmSDF - LIS
1 stop15h 10mUnited Airlines
Sun 12/711:55 amLIS - SDF
1 stop13h 47mUnited Airlines
Deal found 10/30$555
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 11/106:50 amSDF - LIS
1 stop21h 15mAmerican Airlines
Thu 11/208:20 amLIS - SDF
2 stops18h 09mAmerican Airlines
Deal found 10/29$559
This United Airlines deal was found by Cheapflights users on 10/29. 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 11/262:02 pmSDF - LIS
2 stops13h 53mUnited Airlines
Wed 12/311:55 amLIS - SDF
1 stop13h 47mUnited Airlines
Deal found 10/29$561
This Air Canada deal was found by Cheapflights users on 10/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:00 amSDF - LIS
3 stops18h 55mMultiple Airlines
Sun 12/710:50 amLIS - SDF
2 stops16h 39mMultiple Airlines
Deal found 10/30$572
This Ovago deal was found by Cheapflights users on 10/29. 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 11/101:07 pmSDF - LIS
1 stop14h 03mLufthansa
Wed 11/195:00 amLIS - SDF
2 stops23h 54mLufthansa
Deal found 10/29$579
This Delta deal was found by Cheapflights users on 10/30. 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.
Wed 11/126:16 pmSDF - LIS
2 stops18h 14mDelta
Sun 11/235:00 amLIS - SDF
2 stops21h 14mDelta
Deal found 10/30$599
This American Airlines deal was found by Cheapflights users on 10/29. 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 11/266:45 amSDF - LIS
1 stop21h 10mAmerican Airlines
Wed 12/311:05 amLIS - SDF
1 stop15h 37mAmerican Airlines
Deal found 10/29$611

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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$500
(Delta)

One-way from

$401
(Thrive Travel)

Popular in

May

Cheapest in

December

Average price

$858
Provider with most accurate pricing for Louisville Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Lisbon Humberto Delgado flights.
Search Deals
From Louisville Intl to Portugal
Search Deals
One-way flight from Louisville Intl to Portugal
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($202 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 30, 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

Thu 1/15

3:00 pm-3:10 pm

2 stops19h 10m

Lisbon Humberto Delgado

Mon 1/19

5:00 am-11:50 pm

2 stops23h 50m

$500

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 12/3

4:31 pm-8:00 am

1 stop10h 29m

Lisbon Humberto Delgado

Sun 12/7

5:30 am-6:52 pm

2 stops18h 22m

$502

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 1/15

8:29 am-9:20 am

2 stops19h 51m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-7:31 pm

2 stops37h 11m

$539

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

11:00 am-8:10 am

2 stops16h 10m

Lisbon Humberto Delgado

Thu 11/20

5:00 am-8:44 pm

2 stops20h 44m

$546

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

9:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Wed 11/19

5:00 am-8:44 pm

2 stops20h 44m

$546

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/10

3:09 pm-11:20 am

2 stops15h 11m

Lisbon Humberto Delgado

Thu 11/20

11:25 am-12:06 am

2 stops17h 41m

$549

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 12/3

2:05 pm-10:15 am

1 stop15h 10m

Lisbon Humberto Delgado

Sun 12/7

11:55 am-8:42 pm

1 stop13h 47m

$555

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 1/15

11:10 am-9:20 am

3 stops17h 10m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-10:30 pm

2 stops16h 10m

$568

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 11/12

6:16 pm-5:30 pm

2 stops18h 14m

Lisbon Humberto Delgado

Sun 11/23

5:00 am-11:00 pm

2 stops23h 00m

$599

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 11/26

6:45 am-8:55 am

1 stop21h 10m

Lisbon Humberto Delgado

Wed 12/3

11:05 am-9:42 pm

1 stop15h 37m

$611

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 13 results
1
2

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, November is the cheapest month in which you can book a flight from Louisville to Portugal (average of $557). Flying from Louisville to Portugal in June is currently the most expensive (average of $975). 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 October 30, 2025.

When flying from Louisville to Portugal, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 72% versus a flight in the afternoon.

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 October 30, 2025.
Peruse reviews from past customers who have flown with United Airlines and American Airlines 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
8,998 reviews

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
8,998 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,035 reviews
United Airlines
7.4
Good
8,998 reviews

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 16h 10m. Fly via Delta, Air Canada, or United 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.

  • What are the cheapest airlines to fly from Louisville to Portugal one-way?

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $401. United Airlines flights start at $403 while deals on Air Canada start at $509 one-way.

  • 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, November is the cheapest month in which you can book a flight from Louisville to Portugal (average of $557). Flying from Louisville to Portugal in June is currently the most expensive (average of $975). 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.

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Top 2 airlines flying from Louisville to Portugal

Discover the top 2 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$603Average$1,005FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$608Average$964FlexibilityNo cancel feeOn-time71%

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