What is the cheapest airline that flies from Louisville Intl to Portugal?

American Airlines, United Airlines, and Air Canada are the most popular carriers operating from Louisville Intl to Portugal

What airlines fly to Portugal?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Portugal from Louisville according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 5 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

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?

There are 3 operators available for flights from Louisville Intl Airport to Portugal as of August 2026.

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.

$345 Cheap Flights from Louisville to Portugal in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to Portugal

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:41 pm - 12:05 pmSDF Louisville Intl-LIS Lisbon Humberto Delgado

18h 24m2 stops Chicago O'Hare Intl London Heathrow

6:30 am - 11:35 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

22h 05m2 stops Madrid Barajas Dallas/Fort Worth

$729Multiple Airlines

Wed, Feb 17 - Wed, Mar 3

3:49 pm - 9:05 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

12h 16m1 stop Philadelphia

11:05 am - 9:17 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

15h 12m1 stop Philadelphia

$732American Airlines

Wed, Feb 17 - Wed, Mar 3

11:16 am - 9:05 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

16h 49m1 stop Philadelphia

11:05 am - 12:25 amLIS Lisbon Humberto Delgado-SDF Louisville Intl

18h 20m2 stops Philadelphia Charlotte Douglas

$736American Airlines

Wed, Feb 17 - Wed, Mar 3

10:25 am - 9:20 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

41h 55m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

5:00 am - 6:32 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

41h 32m2 stops Frankfurt am Main Chicago O'Hare Intl

$751Multiple Airlines

Mon, Oct 12 - Wed, Oct 28

1:20 pm - 10:45 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

16h 25m1 stop Boston Logan Intl

5:00 am - 5:59 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

16h 59m2 stops Amsterdam Schiphol Minneapolis St Paul

$766KLM

Tue, Oct 20 - Wed, Oct 28

5:38 pm - 5:50 pmSDF Louisville Intl-LIS Lisbon Humberto Delgado

19h 12m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 7:10 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

18h 10m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$771Delta

Wed, Oct 21 - Wed, Oct 28

6:08 pm - 2:30 pmSDF Louisville Intl-LIS Lisbon Humberto Delgado

15h 22m2 stops Boston Logan Intl London Heathrow

7:05 am - 7:28 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

16h 23m2 stops London Heathrow Charlotte Douglas

$773American Airlines

Tue, Oct 20 - Tue, Oct 27

1:25 pm - 8:20 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

13h 55m1 stop Newark

11:55 am - 7:30 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

11h 35m1 stop Washington, D.C. Dulles Intl

$777United Airlines

Tue, Oct 20 - Wed, Oct 28

2:12 pm - 10:30 amSDF Louisville Intl-LIS Lisbon Humberto Delgado

15h 18m1 stop Washington, D.C. Dulles Intl

11:55 am - 7:30 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

11h 35m1 stop Washington, D.C. Dulles Intl

$777United Airlines

Wed, Oct 21 - Wed, Oct 28

5:38 pm - 5:50 pmSDF Louisville Intl-LIS Lisbon Humberto Delgado

19h 12m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

5:00 am - 10:51 pmLIS Lisbon Humberto Delgado-SDF Louisville Intl

22h 51m2 stops Amsterdam Schiphol Minneapolis St Paul

$800Delta

Tue, Oct 6 - Tue, Oct 13

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American Airlines flights from Louisville to Portugal

Our best American Airlines deals on Louisville to Portugal flight tickets

American Airlines

Feb 17

SDF3:49 pmLouisville Intl

12h 16m

1 stop

LIS9:05 amLisbon Humberto Delgado

Mar 3

LIS11:05 amLisbon Humberto Delgado

15h 12m

1 stop

SDF9:17 pmLouisville Intl

$732

American Airlines

Feb 17

SDF11:16 amLouisville Intl

16h 49m

1 stop

LIS9:05 amLisbon Humberto Delgado

Mar 3

LIS11:05 amLisbon Humberto Delgado

18h 20m

2 stops

SDF12:25 amLouisville Intl

$736

American Airlines

Oct 20

SDF6:08 pmLouisville Intl

15h 22m

2 stops

LIS2:30 pmLisbon Humberto Delgado

Oct 27

LIS7:05 amLisbon Humberto Delgado

16h 23m

2 stops

SDF7:28 pmLouisville Intl

$773

Delta flights from Louisville to Portugal

Our best Delta deals on Louisville to Portugal flight tickets

Delta

Oct 6

SDF5:38 pmLouisville Intl

19h 12m

2 stops

LIS5:50 pmLisbon Humberto Delgado

Oct 13

LIS5:00 amLisbon Humberto Delgado

22h 51m

2 stops

SDF10:51 pmLouisville Intl

$800

Delta

Nov 17

SDF1:30 pmLouisville Intl

14h 30m

1 stop

LIS9:00 amLisbon Humberto Delgado

Nov 28

LIS5:00 amLisbon Humberto Delgado

21h 13m

2 stops

SDF9:13 pmLouisville Intl

$826

Delta

Nov 17

SDF7:50 amLouisville Intl

19h 10m

2 stops

LIS8:00 amLisbon Humberto Delgado

Nov 28

LIS5:00 amLisbon Humberto Delgado

21h 13m

2 stops

SDF9:13 pmLouisville Intl

$830

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 2/17

12:41 pm-12:05 pm

2 stops18h 24m

Lisbon Humberto Delgado

Wed 3/3

6:30 am-11:35 pm

2 stops22h 05m

$729

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 2/17

3:49 pm-9:05 am

1 stop12h 16m

Lisbon Humberto Delgado

Wed 3/3

11:05 am-9:17 pm

1 stop15h 12m

$732

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 2/17

11:16 am-9:05 am

1 stop16h 49m

Lisbon Humberto Delgado

Wed 3/3

11:05 am-12:25 am

2 stops18h 20m

$736

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Mon 10/12

10:25 am-9:20 am

2 stops41h 55m

Lisbon Humberto Delgado

Wed 10/28

5:00 am-6:32 pm

2 stops41h 32m

$751

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Tue 10/20

1:20 pm-10:45 am

1 stop16h 25m

Lisbon Humberto Delgado

Wed 10/28

5:00 am-5:59 pm

2 stops16h 59m

$766

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 10/21

5:38 pm-5:50 pm

2 stops19h 12m

Lisbon Humberto Delgado

Wed 10/28

5:00 am-7:10 pm

2 stops18h 10m

$771

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Tue 10/20

6:08 pm-2:30 pm

2 stops15h 22m

Lisbon Humberto Delgado

Tue 10/27

7:05 am-7:28 pm

2 stops16h 23m

$773

Quickest round-trip

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Tue 10/20

1:25 pm-8:20 am

1 stop13h 55m

Lisbon Humberto Delgado

Wed 10/28

11:55 am-7:30 pm

1 stop11h 35m

$777

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 10/21

2:12 pm-10:30 am

1 stop15h 18m

Lisbon Humberto Delgado

Wed 10/28

11:55 am-7:30 pm

1 stop11h 35m

$777

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Tue 10/6

5:38 pm-5:50 pm

2 stops19h 12m

Lisbon Humberto Delgado

Tue 10/13

5:00 am-10:51 pm

2 stops22h 51m

$800

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

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

Prices

Airlines

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 $596, 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 April instead. Flights to Portugal in April, while not as cheap as those in December, still average around $651.

Can stopping save me money on Louisville to Portugal flights?

You could potentially save up to 19% 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

Best Price Found	$345
Fastest flight time	14h 30m
Direct flights	None

The best one-way flight to Portugal from Louisville in the past 72 hours is $345. The best round-trip flight deal from Louisville to Portugal found on momondo in the last 72 hours is $729.

The fastest flight from Louisville to Portugal takes 14h 30m

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?
There are 3 operators available for flights from Louisville Intl Airport to Portugal as of August 2026.
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 Airlines	PriceFrom $543	Free Cancellation	Rating 7.4 10,115 reviews	Search United Airlines flights
Delta	PriceFrom $587	Free Cancellation	Rating 7.8 8,518 reviews	Search Delta flights
American Airlines	PriceFrom $606	Free Cancellation	Rating 7.1 11,984 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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Popular cities

Other flights from Louisville

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $479

Flights to Portofrom $536

Flights to Funchalfrom $547

Flights to Farofrom $587

Flights to Ponta Delgadafrom $579

Flights to Lajesfrom $620

Flights to Hortafrom $685

Flights to Pico Islandfrom $656

Flights to Porto Santofrom $725

Flights to Velasfrom $676

Cheap flights from Louisville to Portugal from $345

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 1/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Louisville to Portugal

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Cheap one-way flights

Big names and deals

Big names and deals

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Filter for what you want

Trusted and free

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Price Alerts

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American Airlines flights from Louisville to Portugal

Our best American Airlines deals on Louisville to Portugal flight tickets

Delta flights from Louisville to Portugal

Our best Delta deals on Louisville to Portugal flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Louisville to Portugal that are best for you.

See travel insights to Portugal from

How to get the cheapest flight ticket from Louisville to Portugal

What is the cheapest month to fly to Portugal?

Can stopping save me money on Louisville to Portugal flights?

What is the cheapest airline that flies from Louisville Intl to Portugal?

What airlines fly to Portugal?

Cheap Louisville to Portugal flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Louisville to Portugal

Best airlines flying from Louisville to Portugal

Compare and see reviews for airlines that fly from Louisville to Portugal with momondo

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Louisville flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year