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Portugal

$338+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Jun 2 — Jun 91
Tue 6/2
Tue 6/9
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 May 3, 2026.

This FlightHub deal was found by Cheapflights users on 4/28. 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.
Sun 11/111:00 am
SDF
-
LIS
2 stops19h 00m
Multiple Airlines
Mon 11/163:45 pm
LIS
-
SDF
2 stops33h 15m
Multiple Airlines
Deal found 4/28$783
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Sun 11/16:30 am
SDF
-
LIS
1 stop20h 40m
United Airlines
Mon 11/161:00 pm
LIS
-
SDF
2 stops32h 49m
United Airlines
Deal found 4/28$801
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Sun 11/156:30 am
SDF
-
LIS
1 stop20h 40m
United Airlines
Sat 11/215:00 am
LIS
-
SDF
2 stops19h 09m
United Airlines
Deal found 5/1$804
This FlightHub deal was found by Cheapflights users on 4/28. 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.
Sun 11/1511:00 am
SDF
-
LIS
2 stops19h 00m
Air Canada
Sat 11/2111:20 am
LIS
-
SDF
2 stops34h 29m
Air Canada
Deal found 4/28$805
This KLM deal was found by Cheapflights users on 5/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1512:53 pm
SDF
-
LIS
2 stops15h 07m
KLM
Sat 11/215:00 am
LIS
-
SDF
2 stops19h 01m
KLM
Deal found 5/1$810
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Sun 11/1511:59 am
SDF
-
LIS
1 stop16h 06m
American Airlines
Sat 11/2111:05 am
LIS
-
SDF
1 stop15h 34m
American Airlines
Deal found 5/1$816
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 9/291:37 pm
SDF
-
LIS
1 stop13h 43m
United Airlines
Tue 10/206:45 am
LIS
-
SDF
2 stops32h 00m
United Airlines
Deal found 4/29$849
This United Airlines deal was found by Cheapflights users on 4/28. 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 4/292:20 pm
SDF
-
LIS
1 stop13h 00m
United Airlines
Tue 5/511:25 am
LIS
-
SDF
2 stops30h 57m
United Airlines
Deal found 4/28$899
This Booking.com deal was found by Cheapflights users on 5/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:30 am
SDF
-
LIS
2 stops45h 50m
Air Canada
Sat 10/2411:25 am
LIS
-
SDF
2 stops37h 49m
Air Canada
Deal found 5/1$904

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 May 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$849
(United Airlines)

One-way from

$338
(oojo)

Popular in

July

Cheapest in

December

Average price

$1,091
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 ($209 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 May 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 May 3, 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

Tue 9/29

1:56 pm-10:30 am

1 stop15h 34m

Lisbon Humberto Delgado

Tue 10/20

12:20 pm-10:18 am

1 stop26h 58m

$866

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Fri 7/31

10:05 am-9:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Thu 8/6

1:00 pm-7:01 pm

2 stops35h 01m

$977

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 7/28

10:05 am-10:30 am

1 stop19h 25m

Lisbon Humberto Delgado

Mon 8/3

1:00 pm-8:23 pm

2 stops36h 23m

$983
Quickest round-trip

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 10/10

1:00 pm-10:45 am

1 stop16h 45m

Lisbon Humberto Delgado

Sat 10/24

5:00 am-8:51 pm

2 stops20h 51m

$1,038

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 9/10

7:22 am-9:20 am

2 stops20h 58m

Lisbon Humberto Delgado

Mon 9/14

11:25 am-8:02 pm

2 stops37h 37m

$1,042

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 9/10

6:15 am-9:20 am

2 stops22h 05m

Lisbon Humberto Delgado

Mon 9/14

11:25 am-8:02 pm

2 stops37h 37m

$1,042

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 9/3

9:00 am-9:20 am

2 stops19h 20m

Lisbon Humberto Delgado

Mon 9/7

11:25 am-6:56 pm

2 stops36h 31m

$1,042
Cheapest one-way

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/28

1:00 pm-9:00 am

1 stop16h 00m

$348
Quickest one-way

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 10/29

5:00 pm-12:10 pm

2 stops15h 10m

$395

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 10/28

3:31 pm-6:40 pm

3 stops23h 09m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/2

Sorted by cheapest first

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 $449). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,023). 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 May 3, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, andAmerican 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
7.9
Good
8,460 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Barney,May 2026

JFK - ATL

Terrible flight. Late, reduced beverage service, lack of headphones, entertainment service didn't work
Delta
7.9
Good
8,460 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Barney,May 2026

JFK - ATL

Terrible flight. Late, reduced beverage service, lack of headphones, entertainment service didn't work
United Airlines
7.4
Good
9,682 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Barney,May 2026

JFK - ATL

Terrible flight. Late, reduced beverage service, lack of headphones, entertainment service didn't work
American Airlines
7.1
Good
11,672 reviews
Delta
7.9
Good
8,460 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Barney,May 2026

JFK - ATL

Terrible flight. Late, reduced beverage service, lack of headphones, entertainment service didn't work

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 15h 34m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 4008 mi.

  • 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 $449). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,023). 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 3 airlines flying from Louisville to Portugal

Discover the top 3 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 May 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$543Average$880FlexibilityNo cancel feeOn-time69%
DeltaCheapest$587Average$1,124FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$603Average$863FlexibilityNo cancel feeOn-time71%

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