$426 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 6/2. 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

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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, Feb 5 - Thu, Feb 12
Multiple Airlines Logo
8:29 am - 7:55 am
SDF
-
LIS
18h 26m2 stops
Multiple Airlines Logo
8:20 am - 11:59 pm
LIS
-
SDF
20h 39m2 stops
$488Multiple Airlines
Thu, Feb 5 - Thu, Feb 12
Lufthansa Logo
1:50 pm - 8:10 am
SDF
-
LIS
13h 20m1 stop
Lufthansa Logo
5:00 am - 7:42 pm
LIS
-
SDF
19h 42m2 stops
$494Lufthansa
Thu, Feb 5 - Thu, Feb 12
Lufthansa Logo
1:50 pm - 8:10 am
SDF
-
LIS
13h 20m1 stop
Lufthansa Logo
10:15 am - 7:25 pm
LIS
-
SDF
14h 10m1 stop
$506Lufthansa
Thu, Feb 26 - Sun, Mar 1
Multiple Airlines Logo
12:00 pm - 6:00 pm
SDF
-
LIS
25h 00m2 stops
Multiple Airlines Logo
8:45 pm - 9:23 pm
LIS
-
SDF
29h 38m2 stops
$513Multiple Airlines
Fri, Jan 30 - Tue, Feb 3
United Airlines Logo
11:10 am - 8:10 am
SDF
-
LIS
16h 00m2 stops
United Airlines Logo
11:20 am - 10:30 pm
LIS
-
SDF
40h 10m2 stops
$588United Airlines
Thu, Jan 15 - Mon, Jan 19
British Airways Logo
1:32 pm - 9:55 pm
SDF
-
LIS
27h 23m2 stops
British Airways Logo
12:55 pm - 11:19 pm
LIS
-
SDF
39h 24m2 stops
$606British Airways
Fri, Jan 30 - Tue, Feb 3
United Airlines Logo
8:29 am - 8:10 am
SDF
-
LIS
18h 41m2 stops
United Airlines Logo
10:15 am - 7:31 pm
LIS
-
SDF
14h 16m1 stop
$608United Airlines
Thu, Jan 15 - Mon, Jan 19
Iberia Logo
1:32 pm - 11:50 am
SDF
-
LIS
17h 18m2 stops
Iberia Logo
8:45 pm - 11:19 pm
LIS
-
SDF
31h 34m2 stops
$628Iberia
Thu, Feb 26 - Sun, Mar 1
Lufthansa Logo
6:15 am - 8:10 am
SDF
-
LIS
20h 55m1 stop
Lufthansa Logo
5:00 am - 8:09 pm
LIS
-
SDF
20h 09m2 stops
$640Lufthansa
Thu, Jan 15 - Mon, Jan 19
Multiple Airlines Logo
11:10 am - 9:20 am
SDF
-
LIS
17h 10m3 stops
Multiple Airlines Logo
11:20 am - 12:59 pm
LIS
-
SDF
30h 39m2 stops
$649Multiple 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 January, when tickets cost $618 (return) on average. On the other hand, the most expensive months are May and August, when the average cost of round-trip tickets is $1,312 and $1,284 respectively.

Good to know

Low seasonFebruary
Cheapest flight$426
Best time to beat the crowds with an average 16% 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.

  • What is the cheapest time of day to fly to Portugal?

    The cheapest time of day to fly to Portugal is generally at night, when round-trip flights cost $775 on average. Morning departures are around 10% more expensive than evening flights, on average. The most expensive time of day to fly to Portugal is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,237.

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 9111 reviews
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
7.1Entertainment
Airline reviews

They did the one thing that really matters - got to Chicago early.

10.0 ExcellentRob, Dec 2025
RIC - ORD
Read more United Airlines reviews

They did the one thing that really matters - got to Chicago early.

I liked the snacks and the flight attendants were friendly.

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

Flight was late - I was downgraded from first class to coach

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

I don’t know who decides what food to serve on these flights but I would be so embarrassed if I served this to anyone and call it food…

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

Not great. Booked Extra seats and got nothing extra at all. It’s basically a big budget airline.

The pilot greased the landing and the crew was fantastic.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

delayed due to weather. Could not communicate with family since the wifi was broken

Experience was good, however I had a delay due to weather happening and had to re purchase a seat on a new plane for a higher price (could be my own issue and misunderstanding) but other than that situation. First time flyer (by myself) was terrific!! The last from ORD to ALO didn't have wifi, but it was only 45 minutes so I'm sure that was part of the reason. Overall my experience was great! Next time I will remember to buy tickets with longer layovers. The delays really saved my overall anxiety. :)

Flight was delayed 17 hours due to aircraft issues. American did provide hotel, transportation and meals, 3 hours past boarding time, but it took us another hour to get the vouchers.

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

Information on your arrival and departure airports