$764 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 4/7. 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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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

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
$764Multiple Airlines
Sat, May 2 - Fri, May 15
American Airlines Logo
7:52 pm - 6:05 pm
SDF
-
LIS
17h 13m
2 stops
American Airlines Logo
11:05 am - 10:31 pm
LIS
-
SDF
16h 26m
1 stop
$767American Airlines
Mon, May 4 - Tue, May 19
KLM Logo
4:42 pm - 2:35 pm
SDF
-
LIS
16h 53m
2 stops
KLM Logo
5:00 am - 5:01 pm
LIS
-
SDF
17h 01m
2 stops
$768KLM
Sat, May 2 - Fri, May 15
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
$771American Airlines
Thu, May 7 - Tue, May 19
Delta Logo
1:15 pm - 10:45 am
SDF
-
LIS
16h 30m
1 stop
Delta Logo
10:00 am - 9:18 pm
LIS
-
SDF
16h 18m
2 stops
$775Delta
Thu, May 7 - Tue, May 19
Delta Logo
1:15 pm - 10:45 am
SDF
-
LIS
16h 30m
1 stop
Delta Logo
12:45 pm - 12:35 pm
LIS
-
SDF
28h 50m
1 stop
$776Delta
Tue, May 5 - Tue, May 19
Iberia Logo
12:11 pm - 11:25 pm
SDF
-
LIS
30h 14m
2 stops
Iberia Logo
6:35 am - 12:23 am
LIS
-
SDF
22h 48m
2 stops
$779Iberia
Tue, May 5 - Tue, May 19
Delta Logo
11:27 am - 10:45 am
SDF
-
LIS
18h 18m
2 stops
Delta Logo
12:45 pm - 12:35 pm
LIS
-
SDF
28h 50m
1 stop
$781Delta
Tue, Jul 28 - Fri, Aug 21
Air Canada Logo
7:10 am - 9:20 am
SDF
-
LIS
21h 10m
2 stops
Air Canada Logo
11:25 am - 8:36 pm
LIS
-
SDF
38h 11m
2 stops
$797Air Canada
Sun, Jul 26 - Fri, Aug 21
Air Canada Logo
9:00 am - 11:05 am
SDF
-
LIS
21h 05m
2 stops
Air Canada Logo
11:25 am - 8:36 pm
LIS
-
SDF
38h 11m
2 stops
$802Air Canada
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$764
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 9533 reviews
7.1Entertainment
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
Airline reviews

It was perfect! I've never flown with United before, but I definitely will in the future

10.0 ExcellentAnonymous, Apr 2026
SFO - LAS
Read more United Airlines reviews

It was perfect! I've never flown with United before, but I definitely will in the future

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

Just a bad day to fly. Flight was delayed from scheduled 6:50 pm departure to 8:50 pm. Combination of factors mostly related to weather at the destination airport (which is where the incoming flight originated) which delayed the inbound flight over an hour. Once on board, we taxied but had to hold again on the taxiway for 10 minutes or so. We did not get wheels up until after 9 pm. The flight was smooth but about 18 minutes from our destination, we had to hold for several minutes more due to weather at ORD. We finally landed at ORD about 11:08 pm (accounting for the time difference, that was about a 3 hour delay from our scheduled departure time). It felt like we were never going to get to our destination. But the flight crew and attendants were very good. The movie selection onboard was also very nice. Got to watch half of a movie just during our taxi from the gate at ATL due to the delay!

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

Terrible, if possible won't be flying again anytime soon!

Efficient boarding and early departure. Very smooth flight. Early arrival in ATL. Great flight.

We purchase first class seats for the first time for multiples of standard economy ticket. There was no access to the club lounge and no priority boarding. The meal and the service once on the plane were superior and the seat was nicer, but not worth the price difference. I will be happy to seat in economy and spend the difference on more travel.

The business class seat is exceptional. I wish the food is more palatable.

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

Flight was delayed. No urgency by American Airlines team to assist those with connecting flights. It was basically you are on your own to run through the terminals to try and make your connection. Thanks, Mary

I have never been assaulted they way I was today in Charlotte - shame on American

One of our group members was struggling to walk. In Charlotte we asked for a wheelchair and she was accompanied by Desmond. I was impressed by his patience and attention. In Boston she received the same service. I didn’t get the name of the helper but she went above and beyond in assisting us. A great AA service

Better snacks but flight and crew were amazing on this flight

Found that the plane used for this short flight is smaller and therefore the seats are really squeezed tight.

It was the most un-special flight experience in my life.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

Flight was on-time, boarding was flawless and the crew was friendly.

The staff are very, very professional. It's what flying should feel like.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

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

Information on your arrival and departure airports