$457 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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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

Tue, Apr 7 - Tue, Apr 21
British Airways Logo
11:19 am - 2:30 pm
SDF
-
LIS
22h 11m
2 stops
British Airways Logo
4:30 pm - 9:28 pm
LIS
-
SDF
33h 58m
2 stops
$457British Airways
Sat, Apr 4 - Tue, Apr 14
British Airways Logo
6:00 pm - 10:05 am
SDF
-
LIS
35h 05m
2 stops
British Airways Logo
4:30 pm - 9:28 pm
LIS
-
SDF
33h 58m
2 stops
$487British Airways
Tue, Apr 7 - Tue, Apr 14
Lufthansa Logo
1:55 pm - 10:15 pm
SDF
-
LIS
27h 20m
2 stops
Lufthansa Logo
5:05 am - 10:30 pm
LIS
-
SDF
22h 25m
2 stops
$501Lufthansa
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
6:12 pm - 2:50 pm
SDF
-
LIS
15h 38m
2 stops
American Airlines Logo
11:05 am - 9:13 pm
LIS
-
SDF
15h 08m
1 stop
$504American Airlines
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
11:38 am - 8:55 am
SDF
-
LIS
16h 17m
1 stop
American Airlines Logo
11:05 am - 9:13 pm
LIS
-
SDF
15h 08m
1 stop
$507American Airlines
Mon, Apr 6 - Sun, Apr 12
British Airways Logo
6:12 pm - 5:55 pm
SDF
-
LIS
18h 43m
2 stops
British Airways Logo
5:10 pm - 11:27 pm
LIS
-
SDF
35h 17m
2 stops
$512British Airways
Tue, Apr 7 - Tue, Apr 21
Lufthansa Logo
8:47 am - 8:20 am
SDF
-
LIS
18h 33m
1 stop
Lufthansa Logo
10:25 am - 11:12 pm
LIS
-
SDF
17h 47m
1 stop
$527Lufthansa
Sat, May 2 - Fri, May 15
KLM Logo
12:35 pm - 10:45 am
SDF
-
LIS
17h 10m
1 stop
KLM Logo
5:00 am - 5:41 pm
LIS
-
SDF
17h 41m
2 stops
$540KLM
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
2:05 pm - 8:10 am
SDF
-
LIS
13h 05m
2 stops
United Airlines Logo
5:00 am - 8:28 pm
LIS
-
SDF
20h 28m
2 stops
$549United Airlines
Sat, May 2 - Fri, 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
$553Lufthansa
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$457
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 9188 reviews
6.6Food
8.1Crew
7.7Boarding
7.3Comfort
7.1Entertainment
Airline reviews

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.

10.0 ExcellentAnonymous, Jan 2026
IAD - ATL
Read more United Airlines reviews

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,

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

Delayed, toilets did not flush, pilot parked to far away from Gate

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

left on time, reasonable boarding process arrived early luggage came out quickly

Could we please end the loud announcements about credit card offers on your flights? We are trying to sleep, work, watch videos, etc. and if we need a credit card, we will ask for one. Flying is already not what it used to be.

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

Enough space,crew was helpful,food was good.The gates are way far especially for travelers with health issues

No enough space plus only allowing one laggage instead of two like other airlines.

There were no TV screens - even in Business class. 5 delays, and only given $12 meal voucher! Terrible!

It was good. But the gate team made me check my carry on when there was plenty of space for my luggage on the plane. Otherwise our trip was fine.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

Concern Regarding Significant Gate Delay and Jet Bridge Issue Dear Customer Relations Team, I am writing to express my disappointment with the experience I had on my recent flight AA 2414 on Sunday January 18, 2026. What should have been a routine departure turned into a frustrating and avoidable delay due to an issue with the jet bridge at the gate. As a result, the flight was delayed by approximately 90 minutes while multiple gate changes were attempted. The lack of clear communication during this period made the situation even more challenging. Passengers were left uncertain about the cause of the delay, the expected timeline, and the next steps. This not only disrupted travel plans but also created unnecessary stress for everyone on board. I understand that operational issues can arise, but a malfunctioning jet bridge and the resulting extended delay suggest an area where procedures or equipment maintenance may need attention. I hope you will review this incident to prevent similar disruptions in the future. I would appreciate acknowledgment of this concern and consideration of appropriate compensation for the inconvenience and lost time caused by this delay. Thank you for taking the time to review my experience. I look forward to hearing from you. Sincerely, Dion Dillard

They made me pay $40 to check a bag that was listed as free when I bought my ticket. Then before boarding they offered to check any bags free.

It was a good trip. Flight Attendants were friendly and responsive.

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

Information on your arrival and departure airports