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Portugal

$309+ 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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
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 August 2, 2025.

Round-trip from

$642
(Scandinavian Airlines)

One-way from

$309

Popular in

September

Cheapest in

January

Average price

$1,245
From Louisville Intl to Portugal
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One-way flight from Louisville Intl to Portugal
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Highest demand for flights based on searches. 13% potential increase in price ($156 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 2, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 8/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:45 pmSDF - LIS
2 stops34h 10mScandinavian Airlines
Wed 12/104:55 pmLIS - SDF
2 stops36h 01mScandinavian Airlines
Deal found 8/1$642
This KLM deal was found by Cheapflights users on 7/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/244:30 pmSDF - LIS
1 stop13h 30mMultiple Airlines
Sat 11/15:30 amLIS - SDF
2 stops20h 12mMultiple Airlines
Deal found 7/31$664
This Delta deal was found by Cheapflights users on 7/31. 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.
Fri 10/245:00 pmSDF - LIS
2 stops13h 00mDelta
Sat 11/15:30 amLIS - SDF
2 stops22h 29mDelta
Deal found 7/31$668
This United Airlines deal was found by Cheapflights users on 8/1. 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 10/159:55 amSDF - LIS
2 stops20h 10mUnited Airlines
Wed 10/2910:15 amLIS - SDF
1 stop12h 37mUnited Airlines
Deal found 8/1$687
This Orbitz deal was found by Cheapflights users on 8/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/46:12 pmSDF - LIS
2 stops47h 53mBritish Airways
Sat 10/116:55 pmLIS - SDF
2 stops32h 33mBritish Airways
Deal found 8/2$839
This American Airlines deal was found by Cheapflights users on 8/1. 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 10/1510:57 amSDF - LIS
1 stop17h 08mAmerican Airlines
Wed 10/2911:05 amLIS - SDF
1 stop14h 12mAmerican Airlines
Deal found 8/1$868
This KAYAK deal was found by Cheapflights users on 8/1. 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.
Sat 10/41:58 pmSDF - LIS
2 stops18h 37mLufthansa
Sat 10/115:05 amLIS - SDF
2 stops20h 43mLufthansa
Deal found 8/1$931

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 August 2, 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

Sat 12/6

5:45 pm-8:55 am

2 stops34h 10m

Lisbon Humberto Delgado

Wed 12/10

4:55 pm-11:56 pm

2 stops36h 01m

$642

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Fri 10/24

4:30 pm-11:00 am

1 stop13h 30m

Lisbon Humberto Delgado

Sat 11/1

5:30 am-9:42 pm

2 stops20h 12m

$664

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Fri 10/24

5:00 pm-11:00 am

2 stops13h 00m

Lisbon Humberto Delgado

Sat 11/1

5:30 am-11:59 pm

2 stops22h 29m

$668

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/15

9:55 am-11:05 am

2 stops20h 10m

Lisbon Humberto Delgado

Wed 10/29

10:15 am-6:52 pm

1 stop12h 37m

$687

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 10/4

6:12 pm-11:05 pm

2 stops47h 53m

Lisbon Humberto Delgado

Sat 10/11

6:55 pm-10:28 pm

2 stops32h 33m

$839

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/15

10:57 am-9:05 am

1 stop17h 08m

Lisbon Humberto Delgado

Wed 10/29

11:05 am-9:17 pm

1 stop14h 12m

$868

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 10/4

1:58 pm-1:35 pm

2 stops18h 37m

Lisbon Humberto Delgado

Sat 10/11

5:05 am-8:48 pm

2 stops20h 43m

$931

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 11/24

2:35 pm-10:15 am

1 stop14h 40m

$309

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 9/9

6:12 pm-9:35 pm

2 stops22h 23m

$611

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 9/9

1:40 pm-10:50 am

1 stop16h 10m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Showing 1-10 of 14 results
1
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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 $1,129). 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 August 2, 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 August 2, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and Scandinavian 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.
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.4
Good
1,457 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,855 reviews
Delta
8.0
Very good
7,983 reviews

Entertainment

7.9

Food

7.3

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $309. Aer Lingus flights start at $611 while deals on TAP AIR PORTUGAL start at $647 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, 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 $1,129). 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 4 airlines flying from Louisville to Portugal

Discover the top 4 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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$600Average$1,053FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$618Average$1,182FlexibilityNo cancel feeOn-time69%
DeltaCheapest$677Average$1,156FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$859Average$1,776FlexibilityNo cancel feeOn-time76%

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