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Cheap flights from Louisville to Portugal from $341

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to Portugal departing on 3/1. 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
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.
United Airlines Logo
9:55 am - 9:20 am
SDF
-
LIS
18h 25m
2 stops
United Airlines Logo
11:25 am - 4:41 pm
LIS
-
SDF
34h 16m
2 stops
$492United Airlines
Tue, Apr 7 - Tue, Apr 14
American Airlines Logo
7:05 pm - 3:35 pm
SDF
-
LIS
15h 30m
2 stops
American Airlines Logo
6:35 am - 6:30 pm
LIS
-
SDF
16h 55m
2 stops
$498American Airlines
Tue, Apr 7 - Tue, Apr 14
United Airlines Logo
9:55 am - 10:30 am
SDF
-
LIS
19h 35m
1 stop
United Airlines Logo
5:05 am - 9:25 am
LIS
-
SDF
33h 20m
2 stops
$540United Airlines
Sun, Apr 5 - Mon, Apr 13
Delta Logo
2:04 pm - 2:55 pm
SDF
-
LIS
19h 51m
2 stops
Delta Logo
5:00 am - 11:52 pm
LIS
-
SDF
23h 52m
2 stops
$546Delta
Sat, May 2 - Fri, May 15
Multiple Airlines Logo
10:50 am - 2:35 pm
SDF
-
LIS
22h 45m
2 stops
Multiple Airlines Logo
12:45 pm - 1:20 pm
LIS
-
SDF
29h 35m
1 stop
$550Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
United Airlines Logo
9:55 am - 10:30 am
SDF
-
LIS
19h 35m
1 stop
United Airlines Logo
11:25 am - 4:41 pm
LIS
-
SDF
34h 16m
2 stops
$584United Airlines
Tue, Apr 7 - Tue, Apr 14
American Airlines Logo
7:31 am - 9:05 am
SDF
-
LIS
20h 34m
1 stop
American Airlines Logo
6:35 am - 6:30 pm
LIS
-
SDF
16h 55m
2 stops
$597American Airlines
Tue, Apr 7 - Tue, Apr 14
United Airlines Logo
9:50 am - 10:15 am
SDF
-
LIS
19h 25m
1 stop
United Airlines Logo
11:55 am - 7:42 pm
LIS
-
SDF
12h 47m
1 stop
$607United Airlines
Wed, Feb 25 - Sun, Mar 1
British Airways Logo
6:12 pm - 6:55 pm
SDF
-
LIS
20h 43m
2 stops
British Airways Logo
6:45 pm - 9:26 pm
LIS
-
SDF
31h 41m
2 stops
$608British Airways
Mon, Mar 23 - Mon, Mar 30
British Airways Logo
1:30 pm - 9:55 pm
SDF
-
LIS
28h 25m
2 stops
British Airways Logo
6:45 pm - 11:20 pm
LIS
-
SDF
33h 35m
2 stops
$609British Airways
Mon, Mar 23 - Mon, Mar 30

United Airlines flights from Louisville to Portugal

Our best United Airlines deals on Louisville to Portugal flight tickets
United Airlines
Apr 7
SDF9:55 amLouisville Intl
18h 25m
2 stops
LIS9:20 amLisbon Humberto Delgado
Apr 14
LIS11:25 amLisbon Humberto Delgado
34h 16m
2 stops
SDF4:41 pmLouisville Intl
$492
United Airlines
Apr 5
SDF9:55 amLouisville Intl
19h 35m
1 stop
LIS10:30 amLisbon Humberto Delgado
Apr 13
LIS5:05 amLisbon Humberto Delgado
33h 20m
2 stops
SDF9:25 amLouisville Intl
$540
United Airlines
Feb 18
SDF9:50 amLouisville Intl
17h 20m
2 stops
LIS8:10 amLisbon Humberto Delgado
Feb 25
LIS11:55 amLisbon Humberto Delgado
12h 47m
1 stop
SDF7:42 pmLouisville Intl
$562

American Airlines flights from Louisville to Portugal

Our best American Airlines deals on Louisville to Portugal flight tickets
American Airlines
Apr 7
SDF7:05 pmLouisville Intl
15h 30m
2 stops
LIS3:35 pmLisbon Humberto Delgado
Apr 14
LIS6:35 amLisbon Humberto Delgado
16h 55m
2 stops
SDF6:30 pmLouisville Intl
$498
American Airlines
Apr 7
SDF7:31 amLouisville Intl
20h 34m
1 stop
LIS9:05 amLisbon Humberto Delgado
Apr 14
LIS6:35 amLisbon Humberto Delgado
16h 55m
2 stops
SDF6:30 pmLouisville Intl
$597
American Airlines
Apr 7
SDF7:31 amLouisville Intl
20h 34m
1 stop
LIS9:05 amLisbon Humberto Delgado
Apr 14
LIS11:05 amLisbon Humberto Delgado
16h 26m
1 stop
SDF10:31 pmLouisville Intl
$699

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 February 14, 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

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

9:55 am-9:20 am

2 stops18h 25m

Lisbon Humberto Delgado

Tue 4/14

11:25 am-4:41 pm

2 stops34h 16m

$492

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

7:05 pm-3:35 pm

2 stops15h 30m

Lisbon Humberto Delgado

Tue 4/14

6:35 am-6:30 pm

2 stops16h 55m

$498

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sun 4/5

9:55 am-10:30 am

1 stop19h 35m

Lisbon Humberto Delgado

Mon 4/13

5:05 am-9:25 am

2 stops33h 20m

$540

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Sat 5/2

2:04 pm-2:55 pm

2 stops19h 51m

Lisbon Humberto Delgado

Fri 5/15

5:00 am-11:52 pm

2 stops23h 52m

$546

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

10:50 am-2:35 pm

2 stops22h 45m

Lisbon Humberto Delgado

Tue 4/14

12:45 pm-1:20 pm

1 stop29h 35m

$550

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

9:55 am-10:30 am

1 stop19h 35m

Lisbon Humberto Delgado

Tue 4/14

11:25 am-4:41 pm

2 stops34h 16m

$584

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Tue 4/7

7:31 am-9:05 am

1 stop20h 34m

Lisbon Humberto Delgado

Tue 4/14

6:35 am-6:30 pm

2 stops16h 55m

$597

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Wed 2/25

9:50 am-10:15 am

1 stop19h 25m

Lisbon Humberto Delgado

Sun 3/1

11:55 am-7:42 pm

1 stop12h 47m

$607

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/23

6:12 pm-6:55 pm

2 stops20h 43m

Lisbon Humberto Delgado

Mon 3/30

6:45 pm-9:26 pm

2 stops31h 41m

$608

LouisvilleLisbon

SDF - LIS

SDFLIS

Louisville Intl

Mon 3/23

1:30 pm-9:55 pm

2 stops28h 25m

Lisbon Humberto Delgado

Mon 3/30

6:45 pm-11:20 pm

2 stops33h 35m

$609

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 25% 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

12h 35m

Direct flights

None
The fastest flight from Louisville to Portugal takes 12h 35m
There are no direct flights from Louisville to Portugal. There are no popular flight routes from Louisville to Portugal.
Search flight deals

  • 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 $595Free CancellationRating
7.4
9,289 reviews
Search United Airlines flights
American AirlinesPriceFrom $606Free CancellationRating
7.2
11,288 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

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