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Cheap flights from Louisville to Portugal from $764

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to Portugal departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Louisville to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:04 pm - 11:15 am
SDF
-
LIS
16h 11m
2 stops
Multiple Airlines Logo
5:00 am - 7:03 pm
LIS
-
SDF
19h 03m
2 stops
$764Multiple Airlines
Sat, May 2 - Fri, May 15
American Airlines Logo
7:52 pm - 6:05 pm
SDF
-
LIS
17h 13m
2 stops
American Airlines Logo
11:05 am - 10:31 pm
LIS
-
SDF
16h 26m
1 stop
$767American Airlines
Sat, May 2 - Fri, May 15
KLM Logo
4:42 pm - 2:35 pm
SDF
-
LIS
16h 53m
2 stops
KLM Logo
5:00 am - 5:01 pm
LIS
-
SDF
17h 01m
2 stops
$768KLM
Mon, May 4 - Tue, May 19
American Airlines Logo
7:31 am - 9:05 am
SDF
-
LIS
20h 34m
1 stop
American Airlines Logo
11:05 am - 10:31 pm
LIS
-
SDF
16h 26m
1 stop
$771American Airlines
Sat, May 2 - Fri, May 15
Delta Logo
1:15 pm - 10:45 am
SDF
-
LIS
16h 30m
1 stop
Delta Logo
10:00 am - 9:18 pm
LIS
-
SDF
16h 18m
2 stops
$775Delta
Thu, May 7 - Tue, May 19
Delta Logo
1:15 pm - 10:45 am
SDF
-
LIS
16h 30m
1 stop
Delta Logo
12:45 pm - 12:35 pm
LIS
-
SDF
28h 50m
1 stop
$776Delta
Thu, May 7 - Tue, May 19
Iberia Logo
12:11 pm - 11:25 pm
SDF
-
LIS
30h 14m
2 stops
Iberia Logo
6:35 am - 12:23 am
LIS
-
SDF
22h 48m
2 stops
$779Iberia
Tue, May 5 - Tue, May 19
Delta Logo
11:27 am - 10:45 am
SDF
-
LIS
18h 18m
2 stops
Delta Logo
12:45 pm - 12:35 pm
LIS
-
SDF
28h 50m
1 stop
$781Delta
Tue, May 5 - Tue, May 19
Air Canada Logo
7:10 am - 9:20 am
SDF
-
LIS
21h 10m
2 stops
Air Canada Logo
11:25 am - 8:36 pm
LIS
-
SDF
38h 11m
2 stops
$797Air Canada
Tue, Jul 28 - Fri, Aug 21
Air Canada Logo
9:00 am - 11:05 am
SDF
-
LIS
21h 05m
2 stops
Air Canada Logo
11:25 am - 8:36 pm
LIS
-
SDF
38h 11m
2 stops
$802Air Canada
Sun, Jul 26 - Fri, Aug 21

American Airlines flights from Louisville to Portugal

Our best American Airlines deals on Louisville to Portugal flight tickets
American Airlines
Apr 7
SDF4:35 pmLouisville Intl
16h 55m
2 stops
LIS2:30 pmLisbon Humberto Delgado
Apr 14
LIS8:25 amLisbon Humberto Delgado
18h 05m
2 stops
SDF9:30 pmLouisville Intl
$765
American Airlines
May 2
SDF7:52 pmLouisville Intl
17h 13m
2 stops
LIS6:05 pmLisbon Humberto Delgado
May 15
LIS11:05 amLisbon Humberto Delgado
16h 26m
1 stop
SDF10:31 pmLouisville Intl
$767
American Airlines
Apr 7
SDF1:18 pmLouisville Intl
14h 47m
1 stop
LIS9:05 amLisbon Humberto Delgado
Apr 14
LIS8:25 amLisbon Humberto Delgado
18h 05m
2 stops
SDF9:30 pmLouisville Intl
$769

KLM flights from Louisville to Portugal

Our best KLM deals on Louisville to Portugal flight tickets
KLM
May 4
SDF4:42 pmLouisville Intl
16h 53m
2 stops
LIS2:35 pmLisbon Humberto Delgado
May 19
LIS5:00 amLisbon Humberto Delgado
17h 01m
2 stops
SDF5:01 pmLouisville Intl
$768
KLM
May 1
SDF2:00 pmLouisville Intl
15h 45m
1 stop
LIS10:45 amLisbon Humberto Delgado
May 8
LIS5:00 amLisbon Humberto Delgado
19h 03m
2 stops
SDF7:03 pmLouisville Intl
$866

momondo 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, momondo users made 832,500 searches. Data last updated April 2, 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

Sat 5/2

2:04 pm-11:15 am

2 stops16h 11m

Lisbon Humberto Delgado

Fri 5/15

5:00 am-7:03 pm

2 stops19h 03m

$764

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 5/2

7:52 pm-6:05 pm

2 stops17h 13m

Lisbon Humberto Delgado

Fri 5/15

11:05 am-10:31 pm

1 stop16h 26m

$767

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 5/4

4:42 pm-2:35 pm

2 stops16h 53m

Lisbon Humberto Delgado

Tue 5/19

5:00 am-5:01 pm

2 stops17h 01m

$768

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 5/2

7:31 am-9:05 am

1 stop20h 34m

Lisbon Humberto Delgado

Fri 5/15

11:05 am-10:31 pm

1 stop16h 26m

$771
Quickest round-trip

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 5/7

1:15 pm-10:45 am

1 stop16h 30m

Lisbon Humberto Delgado

Tue 5/19

10:00 am-9:18 pm

2 stops16h 18m

$775

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Thu 5/7

1:15 pm-10:45 am

1 stop16h 30m

Lisbon Humberto Delgado

Tue 5/19

12:45 pm-12:35 pm

1 stop28h 50m

$776

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 5/5

12:11 pm-11:25 pm

2 stops30h 14m

Lisbon Humberto Delgado

Tue 5/19

6:35 am-12:23 am

2 stops22h 48m

$779

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 5/5

11:27 am-10:45 am

2 stops18h 18m

Lisbon Humberto Delgado

Tue 5/19

12:45 pm-12:35 pm

1 stop28h 50m

$781

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 7/28

7:10 am-9:20 am

2 stops21h 10m

Lisbon Humberto Delgado

Fri 8/21

11:25 am-8:36 pm

2 stops38h 11m

$797

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 7/26

9:00 am-11:05 am

2 stops21h 05m

Lisbon Humberto Delgado

Fri 8/21

11:25 am-8:36 pm

2 stops38h 11m

$802

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Portugal from

How to get the cheapest flight ticket from Louisville to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Louisville is in December. Flight prices, which tend to average around $641, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Louisville during January instead. Flights to Portugal in January, while not as cheap as those in December, still average around $659.

Can stopping save me money on Louisville to Portugal flights?

You could potentially save up to 28% on your flight if you consider stops on a Louisville to Portugal flight.

Cheap Louisville to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to Portugal

Fastest flight time

15h 00m

Direct flights

None
The fastest flight from Louisville to Portugal takes 15h 00m
There are no direct flights from Louisville to Portugal. There are no popular flight routes from Louisville to Portugal.
Search flight deals

Frequently asked questions about flying from Louisville to Portugal

  • When did momondo last update prices for flights from Louisville Intl Airport to Portugal?

    Prices for flights from Louisville Intl Airport to Portugal are refreshed on a daily basis.

  • How many operators does momondo search for flights from Louisville Intl Airport to Portugal?

  • How old do you have to be to fly from Louisville Intl Airport to Portugal?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Louisville Intl Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents you'll need for your trip to Portugal may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Louisville to Portugal

Compare and see reviews for airlines that fly from Louisville to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $555Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights
American AirlinesPriceFrom $603Free CancellationRating
7.1
11,549 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to Portugal?

Finding the right flight to Portugal from Louisville is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portugal quick and easy, saving you time and money.

Can I find flights from Louisville to Portugal with flexible booking policies on momondo?

Flights from Louisville to Portugal with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Louisville to Portugal?

Once all potential Louisville to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Louisville to Portugal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Louisville and alert you when they change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $428
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Flights to Farofrom $438
Flights to Ponta Delgadafrom $585
Flights to Lajesfrom $626
Flights to Pico Islandfrom $750
Flights to Hortafrom $704
Flights to Porto Santofrom $697
Flights to Velasfrom $775