Portugal

$709+ Cheap flights from Louisville (SDF) to Portugal

SDF — LIS
Dec 10 — Dec 171
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Louisville to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Louisville to Portugal

Cheapest flights from Louisville to Portugal

Sun 12/63:26 pm -
2 stops15h 39m
Sun 12/137:45 am -
2 stops18h 53m
Deal found 11/6$801
Sat 11/1410:13 am -
2 stops20h 32m
Fri 11/208:40 pm -
2 stops29h 57m
Deal found 11/9$915
Wed 12/236:00 pm -
2 stops34h 30m
Wed 12/306:00 am -
2 stops40h 20m
Deal found 11/8$928
Sat 11/141:45 pm -
1 stop14h 45m
Fri 11/2012:35 pm -
2 stops39h 55m
Deal found 11/9$946
Thu 12/2412:45 pm -
2 stops21h 25m
Thu 12/315:30 am -
2 stops21h 20m
Deal found 11/9$1,167
Wed 12/236:00 pm -
2 stops34h 30m
Sun 1/1012:30 pm -
2 stops34h 59m
Deal found 11/7$1,170
Fri 12/256:18 am -
1 stop22h 12m
Sun 1/1012:30 pm -
2 stops36h 59m
Deal found 11/7$1,177
Tue 12/221:33 pm -
1 stop14h 57m
Tue 12/296:00 am -
2 stops19h 56m
Deal found 11/7$1,195
Tue 11/171:30 pm -
1 stop14h 30m
Sat 11/285:30 am -
2 stops23h 40m
Deal found 11/7$1,196
Thu 12/242:40 pm -
1 stop14h 40m
Thu 12/3112:25 pm -
2 stops33h 55m
Deal found 11/9$1,260
Thu 12/247:44 am -
1 stop20h 21m
Thu 12/3110:25 am -
1 stop17h 49m
Deal found 11/9$1,406

Find flight deals from Louisville to Portugal

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$709
(Expedia)

Popular in

June

Cheapest in

April

Average price

$1,196
Provider with most accurate pricing for Louisville Intl-Lisbon Humberto Delgado flight deals.
Provider most trusted by Cheapflights users for Louisville Intl-Lisbon Humberto Delgado flights.
From Louisville Intl to Portugal
Highest demand for flights based on searches. 18% potential increase in price ($211 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Average for round-trip flights in November 2026

Cheapflights Fare Finder

 
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 Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Sun 2/28

6:20 am-6:55 am

2 stops19h 35m

Lisbon Humberto Delgado

Fri 3/5

5:00 am-11:15 pm

2 stops23h 15m

$709

LouisvillePorto

SDF Louisville Intl - OPO Porto

SDFOPO

Louisville Intl

Sun 2/28

8:50 am-9:30 am

1 stop19h 40m

Porto

Fri 3/5

6:00 am-7:34 pm

2 stops18h 34m

$722

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Sun 2/7

6:15 am-8:10 am

1 stop20h 55m

Lisbon Humberto Delgado

Tue 2/16

12:50 pm-12:29 pm

2 stops28h 39m

$728

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Sun 2/28

8:50 am-8:10 am

1 stop18h 20m

Lisbon Humberto Delgado

Fri 3/5

10:15 am-8:01 pm

1 stop14h 46m

$747

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Sun 2/28

1:10 pm-8:10 am

1 stop14h 00m

Lisbon Humberto Delgado

Wed 3/3

12:20 pm-7:33 pm

1 stop12h 13m

$748

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Wed 2/10

1:41 pm-8:10 am

1 stop13h 29m

Lisbon Humberto Delgado

Mon 2/15

12:25 pm-4:32 pm

2 stops33h 07m

$767

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Fri 2/12

1:14 pm-12:05 pm

2 stops17h 51m

Lisbon Humberto Delgado

Mon 2/15

8:45 pm-10:24 am

2 stops18h 39m

$806

LouisvilleLisbon

SDF Louisville Intl - LIS Lisbon Humberto Delgado

SDFLIS

Louisville Intl

Fri 2/12

8:30 am-8:55 am

3 stops43h 25m

Lisbon Humberto Delgado

Mon 2/15

12:25 pm-6:15 pm

2 stops34h 50m

$823

LouisvillePorto

SDF Louisville Intl - OPO Porto

SDFOPO

Louisville Intl

Sat 4/3

7:32 pm-9:45 am

2 stops33h 13m

Porto

Mon 4/19

6:00 am-4:49 pm

2 stops39h 49m

$824

LouisvillePorto

SDF Louisville Intl - OPO Porto

SDFOPO

Louisville Intl

Fri 12/25

9:50 am-9:30 am

2 stops42h 40m

Porto

Sun 1/10

12:30 pm-6:29 pm

2 stops34h 59m

$1,170

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 13 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

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, April is the cheapest month in which you can book a flight from Louisville to Portugal (average of $651). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,334). 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

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.

Overall

7.8

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Overall

7.8

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Overall

7.8

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Overall

7.8

Comfort

7.8

Crew

8.5

Food

7.2

Entertainment

7.8

Boarding

8.1

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Related info for your journey

  • 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 40m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 3958 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, April is the cheapest month in which you can book a flight from Louisville to Portugal (average of $651). Flying from Louisville to Portugal in June is currently the most expensive (average of $1,334). 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

Alternative routes for Louisville to Portugal

Top 3 airlines flying from Louisville to Portugal

AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$556Average$984FlexibilityNo cancel feeOn-time71%
DeltaCheapest$587Average$1,187FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$595Average$1,008FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.