$334 Find Cheap Flights from Louisville to Portugal

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Portugal departing on 4/30. 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

Thu, Apr 30 - Thu, May 7
Multiple Airlines Logo
7:40 pm - 11:35 pm
SDF
-
LIS
22h 55m
2 stops
Multiple Airlines Logo
1:00 pm - 10:30 pm
LIS
-
SDF
14h 30m
2 stops
$654Multiple Airlines
Sat, May 2 - Fri, May 15
Multiple Airlines Logo
2:04 pm - 11:15 am
SDF
-
LIS
16h 11m
2 stops
Multiple Airlines Logo
5:00 am - 7:03 pm
LIS
-
SDF
19h 03m
2 stops
$664Multiple Airlines
Fri, Apr 24 - Mon, May 4
Multiple Airlines Logo
2:00 pm - 10:45 am
SDF
-
LIS
15h 45m
1 stop
Multiple Airlines Logo
5:00 am - 10:48 pm
LIS
-
SDF
22h 48m
2 stops
$668Multiple Airlines
Tue, Apr 7 - Tue, Apr 14
Delta Logo
1:56 pm - 2:55 pm
SDF
-
LIS
19h 59m
2 stops
Delta Logo
5:00 am - 7:48 pm
LIS
-
SDF
19h 48m
2 stops
$669Delta
Tue, Apr 7 - Tue, Apr 14
Lufthansa Logo
5:48 pm - 10:45 pm
SDF
-
LIS
23h 57m
2 stops
Lufthansa Logo
10:25 am - 7:59 pm
LIS
-
SDF
14h 34m
1 stop
$709Lufthansa
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
5:00 pm - 11:00 pm
SDF
-
LIS
25h 00m
2 stops
Multiple Airlines Logo
6:35 am - 9:30 pm
LIS
-
SDF
19h 55m
2 stops
$717Multiple 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
8:25 am - 9:30 pm
LIS
-
SDF
18h 05m
2 stops
$718American Airlines
Fri, Apr 24 - Mon, May 4
Lufthansa Logo
5:48 pm - 10:45 pm
SDF
-
LIS
23h 57m
2 stops
Lufthansa Logo
5:05 am - 7:42 pm
LIS
-
SDF
19h 37m
2 stops
$719Lufthansa
Sat, May 2 - Sat, May 9
Delta Logo
2:04 pm - 2:55 pm
SDF
-
LIS
19h 51m
2 stops
Delta Logo
5:00 am - 11:59 pm
LIS
-
SDF
23h 59m
2 stops
$720Delta
Tue, Apr 7 - Tue, Apr 14
American Airlines Logo
7:31 am - 9:05 am
SDF
-
LIS
20h 34m
1 stop
American Airlines Logo
11:05 am - 10:31 pm
LIS
-
SDF
16h 26m
1 stop
$726American 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 July, when the average cost of round-trip tickets is $1,326 and $1,203 respectively.

Good to know

Low seasonJanuary
Cheapest flight$654
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 9% 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 9439 reviews
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
8.1Crew
Airline reviews

Business class seats felt very cramped compared to other airlines.

6.0 GoodJane, Mar 2026
LAX - HND
Read more United Airlines reviews

Business class seats felt very cramped compared to other airlines.

Economy plus was so cramped I could not use my laptop. It was beyond bad.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Not good. One of my luggage is missing. And until now they can’t find it

Horrible experience upon landing. Probably more due to DCA utter incompetence than AA.

Jill was the flight attendant in first class she was fabulous!! Best flight attendant I have had in years.!! And I fly every other week. Other can learn from her!!

Really good. I accidentally left my duffel on the plane and the reps were so friendly in retrieving it.

My 9:50AM flight was delayed to 3:40PM "due to incoming aircraft delay". No aircraft is "delayed" that long. Found out once we did board (after several changes in times) that the aircraft had a maintenance issue and we had to wait for another aircraft. Just tell us that. The aircraft we did get was old and the seats need to be updated. I have been traveling for several weeks with AA and you should refresh your entertainment content as frequent flyers have gone through most of your new content. I have Celiac and a shellfish allergy and continue to have struggles with meals on business and first class flights. Please keep this in mind. Sorry - was a long travel day yesterday and a bit cranky this morning with my experience comments. Still an AA fan.

The business steward was absolutely amazing! Smiles and kindness! Wish all AA flights are like this one!

As a first class customer, there was no power the entire flight which limited my ability to work. I find this unacceptable. The first 11 rows on the left side of the plan were out. I was only offered the option to charge my phone which was not the issue because my laptop was out of power. I asked if there was anything that can be done for me, and the answer was, "no". I was not offered any type of compensation for this AA problem which caused me unnecessary stress due to inability to address business issues on an already challenging travel day. Flight attendants tried to reset the power once but that was the extent of their support. Very disappointing for the lack of expected services on a flight. Please contact me with customer focused response to this complaint.

Not really sure I enjoyed the flight at all. The flight attendants seemed a little tired and rude at times. The snacks were lacking in taste and sustenance. The flight was incredibly turbulent for three plus hours and the pilot had to do a second pass to land at our final destination because he was coming in so fast. He must have taken a short cut and because of it we had to suffer the violent turbulence and the dropping down. It had to be one of if not the worse flights I have ever been on and have traveled vastly all over the world.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

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

Information on your arrival and departure airports