$448 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 2/22. 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

Sun, Feb 22 - Tue, Mar 10
Delta Logo
8:25 am - 8:55 am
SDF
-
LIS
19h 30m
1 stop
Delta Logo
11:15 am - 11:57 pm
LIS
-
SDF
16h 42m
2 stops
$448Delta
Sun, Feb 22 - Thu, Mar 5
Multiple Airlines Logo
12:07 pm - 2:50 pm
SDF
-
LIS
21h 43m
2 stops
Multiple Airlines Logo
8:20 am - 11:16 pm
LIS
-
SDF
19h 56m
2 stops
$453Multiple Airlines
Sun, Feb 22 - Thu, Mar 5
Delta Logo
8:25 am - 8:55 am
SDF
-
LIS
19h 30m
1 stop
Delta Logo
10:00 am - 9:03 pm
LIS
-
SDF
16h 03m
1 stop
$457Delta
Tue, Apr 7 - Tue, Apr 28
British Airways Logo
11:19 am - 3:35 pm
SDF
-
LIS
23h 16m
2 stops
British Airways Logo
7:10 am - 9:28 pm
LIS
-
SDF
19h 18m
2 stops
$458British Airways
Sun, Feb 22 - Thu, Mar 5
Multiple Airlines Logo
12:33 pm - 8:00 am
SDF
-
LIS
14h 27m
1 stop
Multiple Airlines Logo
10:00 am - 10:47 pm
LIS
-
SDF
17h 47m
2 stops
$462Multiple Airlines
Sun, Feb 22 - Mon, Mar 9
Delta Logo
8:25 am - 8:55 am
SDF
-
LIS
19h 30m
1 stop
Delta Logo
10:00 am - 8:42 pm
LIS
-
SDF
14h 42m
1 stop
$482Delta
Sun, Feb 22 - Sun, Mar 8
Delta Logo
8:25 am - 8:55 am
SDF
-
LIS
19h 30m
1 stop
Delta Logo
10:00 am - 4:22 pm
LIS
-
SDF
34h 22m
1 stop
$488Delta
Thu, Feb 19 - Thu, Mar 5
United Airlines Logo
9:50 am - 10:15 am
SDF
-
LIS
19h 25m
1 stop
United Airlines Logo
5:00 am - 10:13 pm
LIS
-
SDF
22h 13m
2 stops
$495United Airlines
Tue, Feb 17 - Wed, Mar 11
Air Canada Logo
6:15 am - 9:20 am
SDF
-
LIS
46h 05m
2 stops
Air Canada Logo
11:20 am - 10:13 pm
LIS
-
SDF
38h 53m
2 stops
$500Air Canada
Tue, Feb 17 - Fri, Mar 6
Lufthansa Logo
2:05 pm - 11:30 pm
SDF
-
LIS
28h 25m
2 stops
Lufthansa Logo
5:00 am - 8:14 pm
LIS
-
SDF
20h 14m
2 stops
$503Lufthansa
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 $1,305 and $1,284 respectively.

Good to know

Low seasonJanuary
Cheapest flight$448
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 9149 reviews
7.1Entertainment
7.3Comfort
6.6Food
7.7Boarding
8.1Crew
Airline reviews

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

10.0 ExcellentMitchell, Jan 2026
SFO - RDU
Read more United Airlines reviews

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

I like flying first class, and United has a nice one

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Tell the crew (when boarding) to yell at the imbeciles blocking us from walking up to scan. I promise everyone crowds around and half of us (most the time I’m group 4) have to push our way through. Your staff is awesome, the public - not so much-

Bags took over and hour to come out. Delays due to wind caused rebooking.

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

Wish they didnt delay off-boarding for 10 minutes so i could connect to my flight from miami to tampa

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

Seats were much more cramped then on the 737. Narrower and rows closer together. Flight was absolutely packed and the plugs under the seats didn't work. Was forced to check my bag even though previous flight had no issue with it.

Good food & refreshment. The seats and entrainment screens are modern compared to others. The staff though pleasant serve and attend to passengers based on nationality. Some get served first others last regardless of their seating positions.

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

Information on your arrival and departure airports