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Portugal

$334+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
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 March 15, 2026.

This United Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 12/42:20 pm
SDF
-
LIS
1 stop14h 55m
United Airlines
Tue 12/811:20 am
LIS
-
SDF
2 stops34h 29m
United Airlines
Deal found 3/12$607
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Tue 10/2010:00 am
SDF
-
LIS
1 stop19h 30m
United Airlines
Wed 11/1111:20 am
LIS
-
SDF
2 stops36h 49m
United Airlines
Deal found 3/11$612
This Expedia deal was found by Cheapflights users on 3/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:00 am
SDF
-
LIS
2 stops18h 20m
Multiple Airlines
Wed 11/115:00 am
LIS
-
SDF
2 stops23h 15m
Multiple Airlines
Deal found 3/11$618
This KAYAK deal was found by Cheapflights users on 3/13. 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.
Fri 4/172:03 pm
SDF
-
LIS
2 stops27h 42m
Lufthansa
Sun 4/265:05 am
LIS
-
SDF
2 stops22h 25m
Lufthansa
Deal found 3/13$622
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Sun 4/265:00 am
SDF
-
LIS
2 stops24h 30m
United Airlines
Thu 5/710:25 am
LIS
-
SDF
2 stops18h 34m
United Airlines
Deal found 3/12$632
This KAYAK deal was found by Cheapflights users on 3/13. 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.
Sun 4/195:48 pm
SDF
-
LIS
2 stops23h 27m
Lufthansa
Sun 4/265:05 am
LIS
-
SDF
2 stops23h 54m
Lufthansa
Deal found 3/13$634
This Air France deal was found by Cheapflights users on 3/15. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/22:04 pm
SDF
-
LIS
2 stops16h 11m
Multiple Airlines
Fri 5/155:00 am
LIS
-
SDF
2 stops19h 03m
Multiple Airlines
Deal found 3/15$664
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Tue 4/72:30 pm
SDF
-
LIS
2 stops37h 50m
United Airlines
Tue 4/1411:25 am
LIS
-
SDF
2 stops34h 16m
United Airlines
Deal found 3/11$665
This BusinessClass deal was found by Cheapflights users on 3/14. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/242:00 pm
SDF
-
LIS
1 stop15h 45m
Multiple Airlines
Mon 5/45:00 am
LIS
-
SDF
2 stops22h 48m
Multiple Airlines
Deal found 3/14$668

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 March 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$622
(KAYAK)

One-way from

$334
(oojo)

Popular in

May

Cheapest in

December

Average price

$680
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. 19% potential increase in price ($220 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 15, 2026.
Use the filters below to find and compare flights from Louisville to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 4/26

5:00 am-10:30 am

2 stops24h 30m

Lisbon Humberto Delgado

Thu 5/7

12:20 pm-7:42 pm

1 stop12h 22m

$632

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

1:56 pm-2:55 pm

2 stops19h 59m

Lisbon Humberto Delgado

Tue 4/14

5:00 am-9:31 pm

2 stops21h 31m

$669

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 4/27

5:48 pm-10:45 pm

2 stops23h 57m

Lisbon Humberto Delgado

Mon 5/4

1:00 pm-2:54 pm

2 stops30h 54m

$717
Quickest round-trip

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 5/2

2:04 pm-10:45 am

1 stop15h 41m

Lisbon Humberto Delgado

Fri 5/15

11:55 am-12:25 am

2 stops17h 30m

$760

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

9:55 am-10:30 am

1 stop19h 35m

Lisbon Humberto Delgado

Tue 4/14

10:25 am-11:12 pm

1 stop17h 47m

$880

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 6/23

6:56 pm-11:25 pm

2 stops23h 29m

Lisbon Humberto Delgado

Fri 7/3

6:35 am-10:08 pm

2 stops20h 33m

$896

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Fri 7/31

5:20 am-9:20 am

2 stops23h 00m

Lisbon Humberto Delgado

Thu 8/6

12:20 pm-10:23 am

1 stop27h 03m

$920
Cheapest one-way
Quickest one-way

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 7/21

5:10 pm-3:35 pm

2 stops17h 25m

$334

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 7/21

7:11 pm-11:40 pm

3 stops23h 29m

$490

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 5/24

9:41 am-10:10 pm

3 stops55h 29m

$493

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 14 resultsSorted by cheapest first
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, January is the cheapest month in which you can book a flight from Louisville to Portugal (average of $472). Flying from Louisville to Portugal in July is currently the most expensive (average of $878). 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 March 15, 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
9,428 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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
7.1
Good
11,467 reviews
United Airlines
7.4
Good
9,428 reviews

Boarding

7.7

Crew

8.1

Food

6.6

Overall

7.4

Comfort

7.3

Entertainment

7.1

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 19h 59m. Fly via United Airlines or Delta 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 $472). Flying from Louisville to Portugal in July is currently the most expensive (average of $878). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$543Average$889FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$603Average$870FlexibilityNo cancel feeOn-time71%

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