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Portugal

$343+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This United Airlines deal was found by Cheapflights users on 1/28. 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 2/252:35 pm
SDF
-
LIS
2 stops12h 35m
United Airlines
Wed 3/45:00 am
LIS
-
SDF
2 stops17h 19m
United Airlines
Deal found 1/28$496
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:43 pm
SDF
-
LIS
2 stops23h 32m
Multiple Airlines
Tue 4/1411:25 am
LIS
-
SDF
2 stops34h 16m
Multiple Airlines
Deal found 1/28$502
This KLM deal was found by Cheapflights users on 1/28. 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.
Tue 3/103:05 pm
SDF
-
LIS
2 stops13h 55m
KLM
Tue 3/175:00 am
LIS
-
SDF
2 stops17h 49m
KLM
Deal found 1/28$503
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/169:00 am
SDF
-
LIS
2 stops21h 15m
United Airlines
Wed 3/2511:55 am
LIS
-
SDF
2 stops32h 51m
United Airlines
Deal found 1/27$513
This Gurufare deal was found by Cheapflights users on 1/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/101:47 pm
SDF
-
LIS
1 stop14h 23m
Lufthansa
Tue 3/175:00 am
LIS
-
SDF
2 stops22h 59m
Lufthansa
Deal found 1/28$546
This Delta deal was found by Cheapflights users on 1/27. 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 3/161:56 pm
SDF
-
LIS
1 stop14h 04m
Delta
Wed 3/255:30 am
LIS
-
SDF
2 stops19h 12m
Delta
Deal found 1/27$554
This Delta deal was found by Cheapflights users on 1/27. 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 3/156:35 am
SDF
-
LIS
1 stop22h 20m
Delta
Wed 3/255:30 am
LIS
-
SDF
2 stops19h 12m
Delta
Deal found 1/27$560
This Gurufare deal was found by Cheapflights users on 1/26. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:20 pm
SDF
-
LIS
2 stops22h 25m
Lufthansa
Fri 5/155:05 am
LIS
-
SDF
2 stops22h 25m
Lufthansa
Deal found 1/26$567

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$496
(United Airlines)

One-way from

$343
(KAYAK)

Popular in

May

Cheapest in

December

Average price

$659
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. 13% potential increase in price ($147 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Wed 2/25

2:35 pm-8:10 am

2 stops12h 35m

Lisbon Humberto Delgado

Wed 3/4

5:00 am-5:19 pm

2 stops17h 19m

$496

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 2/25

3:49 pm-8:55 am

1 stop12h 06m

Lisbon Humberto Delgado

Wed 3/4

11:05 am-9:13 pm

1 stop15h 08m

$508

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

4:33 pm-11:00 pm

2 stops25h 27m

Lisbon Humberto Delgado

Tue 4/14

6:45 pm-6:32 pm

2 stops28h 47m

$508

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/16

9:00 am-10:15 am

2 stops21h 15m

Lisbon Humberto Delgado

Wed 3/25

11:55 am-4:46 pm

2 stops32h 51m

$513

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/16

1:56 pm-8:00 am

1 stop14h 04m

Lisbon Humberto Delgado

Wed 3/25

5:30 am-8:42 pm

2 stops19h 12m

$554

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 3/17

1:56 pm-8:00 am

1 stop14h 04m

Lisbon Humberto Delgado

Wed 3/25

5:30 am-8:42 pm

2 stops19h 12m

$554

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 3/15

6:35 am-8:55 am

1 stop22h 20m

Lisbon Humberto Delgado

Wed 3/25

5:30 am-8:42 pm

2 stops19h 12m

$560

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 5/2

7:20 pm-10:45 pm

2 stops22h 25m

Lisbon Humberto Delgado

Fri 5/15

5:05 am-10:30 pm

2 stops22h 25m

$567

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/21

1:15 pm-9:35 pm

2 stops27h 20m

$343

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/9

12:07 pm-6:55 pm

2 stops26h 48m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 14 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, February is the cheapest month in which you can book a flight from Louisville to Portugal (average of $460). Flying from Louisville to Portugal in July is currently the most expensive (average of $886). 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.

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 January 29, 2026.
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
9,215 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,215 reviews
United Airlines
7.4
Good
9,215 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,205 reviews
United Airlines
7.4
Good
9,215 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 12h 06m. Fly via United Airlines, KLM, or American 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, February is the cheapest month in which you can book a flight from Louisville to Portugal (average of $460). Flying from Louisville to Portugal in July is currently the most expensive (average of $886). 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$595Average$909FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$606Average$957FlexibilityNo cancel feeOn-time71%

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