$343 Find Cheap Flights from Louisville to Portugal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Portugal departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Portugal

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Book Cheap Louisville to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Portugal

mar., abr. 7 - mar., abr. 14
British Airways Logo
4:33 pm - 11:00 pm
SDF
-
LIS
25h 27m
2 stops
British Airways Logo
6:45 pm - 6:32 pm
LIS
-
SDF
28h 47m
2 stops
$508British Airways
vie., may. 1 - vie., may. 8
Multiple Airlines Logo
7:20 pm - 9:55 pm
SDF
-
LIS
21h 35m
2 stops
Multiple Airlines Logo
1:00 pm - 1:22 pm
LIS
-
SDF
29h 22m
2 stops
$548Multiple Airlines
sáb., may. 2 - vie., may. 15
British Airways Logo
12:45 pm - 10:05 am
SDF
-
LIS
40h 20m
2 stops
British Airways Logo
11:05 am - 11:27 pm
LIS
-
SDF
17h 22m
2 stops
$552British Airways
sáb., may. 2 - vie., may. 15
Lufthansa Logo
7:20 pm - 10:45 pm
SDF
-
LIS
22h 25m
2 stops
Lufthansa Logo
5:05 am - 10:30 pm
LIS
-
SDF
22h 25m
2 stops
$567Lufthansa
mar., abr. 7 - mar., abr. 14
United Airlines Logo
2:30 pm - 10:30 am
SDF
-
LIS
15h 00m
1 stop
United Airlines Logo
5:05 am - 10:30 pm
LIS
-
SDF
22h 25m
2 stops
$592United Airlines
sáb., abr. 11 - sáb., abr. 18
United Airlines Logo
9:07 am - 10:35 am
SDF
-
LIS
20h 28m
2 stops
United Airlines Logo
7:25 am - 8:16 pm
LIS
-
SDF
17h 51m
2 stops
$597United Airlines
mar., abr. 7 - mar., abr. 14
American Airlines Logo
7:31 am - 9:05 am
SDF
-
LIS
20h 34m
1 stop
American Airlines Logo
6:35 am - 5:56 pm
LIS
-
SDF
16h 21m
2 stops
$602American Airlines
sáb., abr. 4 - mar., abr. 14
British Airways Logo
6:00 pm - 11:10 pm
SDF
-
LIS
24h 10m
2 stops
British Airways Logo
6:45 pm - 11:27 pm
LIS
-
SDF
33h 42m
2 stops
$605British Airways
sáb., abr. 11 - sáb., abr. 18
Lufthansa Logo
2:30 pm - 10:35 am
SDF
-
LIS
15h 05m
1 stop
Lufthansa Logo
7:25 am - 8:16 pm
LIS
-
SDF
17h 51m
2 stops
$660Lufthansa
jue., mar. 12 - jue., mar. 19
United Airlines Logo
6:00 am - 8:10 am
SDF
-
LIS
22h 10m
2 stops
United Airlines Logo
5:00 am - 8:14 pm
LIS
-
SDF
43h 14m
2 stops
$679United Airlines
Booking Insights

KAYAK's insights & trends for Louisville to Portugal flights

Get data-powered insights and trends into flights from Louisville to Portugal to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Louisville to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Louisville to Portugal is December, when tickets cost $641 (return) on average. On the other hand, the most expensive months are May and August, when the average cost of round-trip tickets is $1,297 and $1,284 respectively.

Good to know

Low seasonJanuary
Cheapest flight$343
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Louisville to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Louisville to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Louisville to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Louisville to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Louisville to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Louisville to Portugal

 
Need help choosing which airline to fly with from Louisville to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9210 reviews
7.3Comfort
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
Airline reviews

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

8.0 ExcellentAnonymous, Jan 2026
ORD - TPA
Read more United Airlines reviews

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

It was a little concerning to hear the ground crew arguing with the flight crew over baggage space. Instead of taking them and checking them, they started checking for space in the first class cabin moving items around like the flight crew didn't know what they were doing. I was embarrassed for them.

2 hour delay due to equipment failure. No updates via the app and airport screens (which continued to show a departure time in the past). AA eventually switched planes and the new plane was not catered or cleaned correctly.

I booked an aisle seat and was given a middle. At 6'4" 230lbs, it is not ideal to fly in the middle row for myself and passengers.

Everything you need to know for your flight from Louisville to Portugal

Information on your arrival and departure airports