$391+ Cheap flights from Louisville (SDF) to Portugal
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/25. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — LIS
Oct 26 — Nov 21
Round-trip
1 adult, Economy
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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
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Cheapest flights from Louisville to PortugalExplore 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 September 26, 2026.
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 September 26, 2026.
This Delta deal was found by Cheapflights users on 9/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/78:05 am -
2 stops21h 30m
Sat 11/1410:15 am -
2 stops16h 27m
Deal found 9/23![Delta logo]()
$698
This Delta deal was found by Cheapflights users on 9/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:00 am -
2 stops20h 00m
Sat 11/145:30 am -
2 stops21h 12m
Deal found 9/23![Delta logo]()
$711
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 11/710:55 am -
1 stop16h 15m
Sat 11/145:00 am -
2 stops23h 30m
Deal found 9/23![United Airlines logo]()
$714
This United Airlines deal was found by Cheapflights users on 9/26. 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 11/101:45 pm -
1 stop14h 45m
Tue 11/176:00 am -
2 stops19h 34m
Deal found 9/26![United Airlines logo]()
$726
This Ovago deal was found by Cheapflights users on 9/23. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/75:40 am -
1 stop22h 50m
Sat 11/146:10 am -
2 stops17h 22m
Deal found 9/23![Lufthansa logo]()
$733
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/2111:15 am -
1 stop16h 05m
Wed 10/285:00 am -
2 stops17h 32m
Deal found 9/23![United Airlines logo]()
$745
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 10/176:30 pm -
1 stop10h 15m
Mon 10/266:00 am -
2 stops31h 38m
Deal found 9/23![United Airlines logo]()
$751
This BusinessClass deal was found by Cheapflights users on 9/24. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:30 pm -
1 stop10h 15m
Mon 10/2612:30 pm -
2 stops25h 08m
Deal found 9/24![Lufthansa logo]()
$773
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/186:00 am -
1 stop23h 30m
Sat 10/3110:15 am -
2 stops28h 23m
Deal found 9/22![United Airlines logo]()
$775
This American Airlines deal was found by Cheapflights users on 9/24. 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 11/811:08 am -
1 stop16h 57m
Sun 11/1511:05 am -
1 stop15h 58m
Deal found 9/24![American Airlines logo]()
$776
This Expedia deal was found by Cheapflights users on 9/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/81:14 pm -
2 stops23h 51m
Sun 11/156:45 pm -
2 stops31h 52m
Deal found 9/24![Iberia logo]()
$789
This Ovago deal was found by Cheapflights users on 9/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:18 pm -
2 stops36h 22m
Tue 11/1712:25 pm -
2 stops34h 12m
Deal found 9/26![Multiple Airlines logo]()
$793
Best flights from Louisville to PortugalDiscover carefully curated flight deals from Louisville to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
Discover carefully curated flight deals from Louisville to Portugal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 26, 2026.
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 11/79:55 am -
1 stop19h 25m
Sat 11/1410:15 am -
1 stop18h 15m
Deal found 9/23![United Airlines logo]()
$726
This Expedia deal was found by Cheapflights users on 9/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:16 am -
2 stops41h 24m
Sun 11/18:40 pm -
2 stops29h 57m
Deal found 9/24![Iberia logo]()
$800
This British Airways deal was found by Cheapflights users on 9/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/711:57 am -
2 stops14h 43m
Fri 11/138:40 pm -
2 stops30h 57m
Deal found 9/26![Multiple Airlines logo]()
$837
This KLM deal was found by Cheapflights users on 9/26. 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.
Mon 3/226:26 pm -
2 stops15h 24m
Mon 3/299:45 pm -
2 stops24h 55m
Deal found 9/26![KLM logo]()
$844
This Delta deal was found by Cheapflights users on 9/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:26 pm -
2 stops41h 44m
Sun 2/1410:10 am -
2 stops18h 52m
Deal found 9/22![Delta logo]()
$989
This Air Canada deal was found by Cheapflights users on 9/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/161:45 pm -
2 stops15h 55m
Fri 11/2011:20 am -
2 stops31h 17m
Deal found 9/24![Air Canada logo]()
$1,002
This United Airlines deal was found by Cheapflights users on 9/26. 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 11/101:45 pm -
1 stop14h 45m
Tue 11/176:00 am -
2 stops19h 34m
Deal found 9/26![United Airlines logo]()
$726
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 10/176:30 pm -
1 stop10h 15m
Mon 10/266:00 am -
2 stops31h 38m
Deal found 9/23![United Airlines logo]()
$751
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/186:00 am -
1 stop23h 30m
Sat 10/3110:15 am -
2 stops28h 23m
Deal found 9/22![United Airlines logo]()
$775
This United Airlines deal was found by Cheapflights users on 9/24. 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 11/89:55 am -
1 stop19h 10m
Sun 11/1510:15 am -
2 stops29h 19m
Deal found 9/24![United Airlines logo]()
$801
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/255:40 am -
1 stop23h 50m
Sun 11/112:30 pm -
2 stops50h 08m
Deal found 9/24![United Airlines logo]()
$819
This Air Canada deal was found by Cheapflights users on 9/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:10 pm -
3 stops20h 30m
Tue 11/176:05 am -
3 stops21h 25m
Deal found 9/26![Air Canada logo]()
$1,520
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 11/71:45 pm -
1 stop14h 45m
Sat 11/1412:35 pm -
1 stop15h 55m
Deal found 9/23![United Airlines logo]()
$969
This United Airlines deal was found by Cheapflights users on 9/21. 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.
Mon 11/161:45 pm -
1 stop13h 25m
Fri 11/2011:20 am -
2 stops34h 40m
Deal found 9/21![United Airlines logo]()
$999
This United Airlines deal was found by Cheapflights users on 9/23. 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 11/172:11 pm -
2 stops12h 59m
Sat 11/2810:15 am -
2 stops29h 19m
Deal found 9/23![United Airlines logo]()
$1,052
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Mon 3/221:55 pm -
3 stops16h 25m
Mon 3/296:05 am -
3 stops19h 09m
Deal found 9/26![United Airlines logo]()
$1,398
This American Airlines deal was found by Cheapflights users on 9/22. 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.
Wed 2/105:46 pm -
3 stops41h 54m
Sun 2/1412:45 pm -
3 stops37h 50m
Deal found 9/22![Multiple Airlines logo]()
$8,221
Last-minute flights from Louisville to PortugalDiscover last-minute flight deals from Louisville to Portugal. Data last updated September 26, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Portugal. Data last updated September 26, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/26. 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.
Sat 9/266:16 pm -
2 stops33h 04m
Tue 10/65:05 am -
2 stops23h 54m
Deal found 9/26![United Airlines logo]()
$1,020
This Justfly.com deal was found by Cheapflights users on 9/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:46 pm -
2 stops29h 19m
Mon 10/266:35 pm -
2 stops31h 00m
Deal found 9/22![British Airways logo]()
$862
This KAYAK deal was found by Cheapflights users on 9/23. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:00 am -
1 stop19h 30m
Mon 10/2612:25 pm -
2 stops25h 13m
Deal found 9/23![Lufthansa logo]()
$960
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Thu 10/1510:00 am -
1 stop19h 30m
Mon 10/2610:15 am -
1 stop17h 15m
Deal found 9/23![United Airlines logo]()
$1,062
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sat 10/176:30 pm -
1 stop10h 15m
Mon 10/266:00 am -
2 stops31h 38m
Deal found 9/23![United Airlines logo]()
$751
This BusinessClass deal was found by Cheapflights users on 9/24. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:30 pm -
1 stop10h 15m
Mon 10/2612:30 pm -
2 stops25h 08m
Deal found 9/24![Lufthansa logo]()
$773
This United deal was found by Cheapflights users on 9/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:16 pm -
2 stops34h 29m
Mon 10/2612:30 pm -
2 stops25h 08m
Deal found 9/24![Multiple Airlines logo]()
$1,059
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/186:00 am -
2 stops21h 20m
Sat 10/3110:15 am -
2 stops28h 23m
Deal found 9/22![United Airlines logo]()
$775
This KAYAK deal was found by Cheapflights users on 9/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:00 am -
1 stop23h 30m
Sat 10/3110:15 am -
1 stop17h 15m
Deal found 9/22![Lufthansa logo]()
$893
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/2111:15 am -
1 stop16h 05m
Wed 10/285:00 am -
2 stops17h 32m
Deal found 9/23![United Airlines logo]()
$745
This Expedia deal was found by Cheapflights users on 9/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:16 am -
2 stops41h 24m
Sun 11/18:40 pm -
2 stops29h 57m
Deal found 9/24![Iberia logo]()
$800
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/255:40 am -
1 stop23h 50m
Sun 11/112:30 pm -
2 stops50h 08m
Deal found 9/24![United Airlines logo]()
$819
One-way flights from Louisville to PortugalSearch for one-way flight options from Louisville to Portugal. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
Search for one-way flight options from Louisville to Portugal. Find affordable one-way fares based on user searches. Data last updated September 26, 2026.
This Expedia deal was found by Cheapflights users on 9/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/252:54 pm -
2 stops15h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Iberia logo]()
$391
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:30 am -
2 stops21h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Aer Lingus logo]()
$432
This American Airlines deal was found by Cheapflights users on 9/25. 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.
Mon 11/97:30 am -
1 stop20h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![American Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/215:15 am -
2 stops23h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$463
This Air Canada deal was found by Cheapflights users on 9/21. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:04 am -
3 stops16h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Air Canada logo]()
$475
This Cheapflightsfares deal was found by Cheapflights users on 9/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:29 am -
2 stops23h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![Aer Lingus logo]()
$483
This Air Canada deal was found by Cheapflights users on 9/25. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:10 pm -
3 stops15h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Air Canada logo]()
$541
This Iberia deal was found by Cheapflights users on 9/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:46 pm -
2 stops17h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$594
This American Airlines deal was found by Cheapflights users on 9/22. 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.
Fri 10/167:15 am -
1 stop20h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![American Airlines logo]()
$635
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Fri 12/256:24 am -
1 stop22h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![United Airlines logo]()
$665
This Air Canada deal was found by Cheapflights users on 9/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:25 am -
3 stops17h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Air Canada logo]()
$682
This Trip.com deal was found by Cheapflights users on 9/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/252:40 pm -
3 stops22h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$922
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 September 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $624 (Delta) |
One-way from | $391 (Expedia) |
Popular in | June |
Cheapest in | April |
Average price | $1,163 |
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 7,457,451 searches. Data last updated September 26, 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
Cheapest round-trip
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Mon 11/9
7:30 am-9:05 am
1 stop20h 35m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$463
Quickest round-trip
LouisvillePorto
SDF Louisville Intl - OPO Porto
SDFOPO
Louisville Intl
Wed 10/21
6:30 pm-9:45 am
1 stop10h 15m
Porto
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$463
LouisvillePorto
SDF Louisville Intl - OPO Porto
SDFOPO
Louisville Intl
Wed 10/21
9:53 am-10:30 am
2 stops19h 37m
Porto
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$463
LouisvillePorto
SDF Louisville Intl - OPO Porto
SDFOPO
Louisville Intl
Wed 10/21
9:04 am-7:00 am
3 stops16h 56m
Porto
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$475
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Fri 10/16
6:29 am-10:45 am
2 stops23h 16m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$483
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Mon 11/9
2:10 pm-10:40 am
3 stops15h 30m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$541
LouisvillePorto
SDF Louisville Intl - OPO Porto
SDFOPO
Louisville Intl
Wed 10/21
12:46 pm-11:45 am
2 stops17h 59m
Porto
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$594
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Fri 10/16
7:15 am-9:05 am
1 stop20h 50m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$635
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Fri 10/16
10:25 am-9:20 am
3 stops17h 55m
Lisbon Humberto Delgado
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$682
LouisvilleLisbon
SDF Louisville Intl - LIS Lisbon Humberto Delgado
SDFLIS
Louisville Intl
Sat 11/7
9:55 am-10:20 am
1 stop19h 25m
Lisbon Humberto Delgado
Sat 11/14
10:15 am-11:30 pm
1 stop18h 15m
$726
Showing 1-10 of 26 resultsSorted 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.
SDF-OPO
SDF-LIS
SDF-FAO
SDF-FNC
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
SDF-PT0
SDF-OPO
SDF-LIS
SDF-FAO
SDF-FNC
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
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 September 26, 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.
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Food
7.2
Boarding
8.1
Crew
8.5
Entertainment
7.8
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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.
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Alternative routes for Louisville to Portugal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Portugal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Louisville to Portugal by cabin class
Find flights from Louisville to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Louisville and Portugal flights
Browse other Louisville and Portugal flight options. Last updated on September 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Louisville to Portugal flights
Consider these flights traveling from Louisville to Portugal.
Fly to Portugal regions
Consider these flights traveling to Portugal regions.
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 7,457,451 searches. Data last updated September 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$543 | Average$1,006 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$587 | Average$1,187 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$606 | Average$1,057 | FlexibilityNo cancel fee | On-time71% |