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Portugal

$440+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap 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 December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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.
Wed 12/242:22 pmSDF - LIS
1 stop14h 53mUnited Airlines
Fri 1/25:00 amLIS - SDF
2 stops34h 03mUnited Airlines
Deal found 12/15$1,802
This Ovago deal was found by Cheapflights users on 12/15. 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.
Wed 12/242:22 pmSDF - LIS
1 stop14h 53mLufthansa
Fri 1/211:55 amLIS - SDF
1 stop12h 16mLufthansa
Deal found 12/15$1,987
This Air France deal was found by Cheapflights users on 12/14. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:49 pmSDF - LIS
2 stops17h 21mMultiple Airlines
Fri 1/25:00 amLIS - SDF
2 stops17h 26mMultiple Airlines
Deal found 12/14$2,017
This Ovago deal was found by Cheapflights users on 12/15. 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.
Wed 12/242:22 pmSDF - LIS
1 stop14h 53mLufthansa
Sat 1/310:15 amLIS - SDF
1 stop18h 22mLufthansa
Deal found 12/15$2,036

Find flight deals from Louisville to Portugal

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

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$486
(United Airlines)

One-way from

$440
(Air Canada)

Popular in

May

Cheapest in

January

Average price

$641
Provider with most accurate pricing for Louisville Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Lisbon Humberto Delgado flights.
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From Louisville Intl to Portugal
Search Deals
One-way flight from Louisville Intl to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($185 potential increase over avg. RT price).
Search Deals
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 December 2025
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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 December 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

Sat 1/10

2:10 pm-8:10 am

2 stops37h 00m

Lisbon Humberto Delgado

Fri 1/23

5:00 am-8:28 pm

2 stops20h 28m

$486

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 1/15

8:30 am-9:20 am

2 stops19h 50m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-7:31 pm

2 stops37h 11m

$493

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 1/15

6:28 am-9:20 am

2 stops21h 52m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-1:24 pm

2 stops31h 04m

$493

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 1/27

1:45 pm-8:10 am

1 stop13h 25m

Lisbon Humberto Delgado

Tue 2/3

5:00 am-7:43 pm

2 stops19h 43m

$494

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 1/11

1:40 pm-8:10 am

1 stop13h 30m

Lisbon Humberto Delgado

Sat 1/24

7:45 am-11:23 pm

2 stops20h 38m

$496

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 1/10

2:05 pm-9:20 am

2 stops38h 15m

Lisbon Humberto Delgado

Fri 1/23

11:20 am-1:28 pm

2 stops31h 08m

$497

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Fri 1/23

2:05 pm-8:10 am

2 stops13h 05m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-8:28 pm

2 stops20h 28m

$498

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 6/3

7:00 am-9:20 am

2 stops21h 20m

$440

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 6/2

7:00 am-9:20 am

2 stops21h 20m

$440

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 6/4

10:59 am-9:05 am

1 stop17h 06m

$468

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 19 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, December is the cheapest month in which you can book a flight from Louisville to Portugal (average of $492). 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 December 15, 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 December 15, 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
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,092 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,052 reviews
United Airlines
7.4
Good
9,092 reviews

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 13h 25m. Fly via United Airlines, KLM, or Lufthansa 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, December is the cheapest month in which you can book a flight from Louisville to Portugal (average of $492). 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.

See more FAQs

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$596Average$898FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$616Average$947FlexibilityNo cancel feeOn-time71%

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