$482 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 12/2. 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

jue., ene. 8 - vie., ene. 16
British Airways Logo
10:35 am - 9:55 pmSDF-LIS
30h 20m2 stops
British Airways Logo
7:05 am - 11:19 pmLIS-SDF
21h 14m2 stops
$482British Airways
Find Deal
jue., ene. 8 - vie., ene. 16
Multiple Airlines Logo
11:10 am - 9:20 amSDF-LIS
17h 10m2 stops
Multiple Airlines Logo
5:00 am - 11:23 pmLIS-SDF
23h 23m2 stops
$483Multiple Airlines
Find Deal
jue., ene. 15 - lun., ene. 19
United Airlines Logo
8:29 am - 9:20 amSDF-LIS
19h 51m2 stops
United Airlines Logo
11:20 am - 7:43 pmLIS-SDF
37h 23m2 stops
$489United Airlines
Find Deal
lun., feb. 2 - dom., feb. 8
Air Canada Logo
6:12 pm - 9:20 amSDF-LIS
34h 08m2 stops
Air Canada Logo
10:50 am - 8:28 pmLIS-SDF
38h 38m2 stops
$494Air Canada
Find Deal
jue., ene. 8 - vie., ene. 16
Multiple Airlines Logo
11:10 am - 9:20 amSDF-LIS
17h 10m2 stops
Multiple Airlines Logo
10:15 am - 7:31 pmLIS-SDF
14h 16m1 stop
$496Multiple Airlines
Find Deal
jue., feb. 12 - dom., feb. 15
Multiple Airlines Logo
12:00 pm - 11:50 amSDF-LIS
18h 50m2 stops
Multiple Airlines Logo
7:45 am - 9:23 pmLIS-SDF
18h 38m2 stops
$500Multiple Airlines
Find Deal
lun., feb. 2 - dom., feb. 8
American Airlines Logo
1:15 pm - 12:05 pmSDF-LIS
17h 50m2 stops
American Airlines Logo
11:05 am - 9:16 pmLIS-SDF
15h 11m1 stop
$501American Airlines
Find Deal
jue., ene. 8 - vie., ene. 16
United Airlines Logo
11:10 am - 9:20 amSDF-LIS
17h 10m2 stops
United Airlines Logo
10:15 am - 7:31 pmLIS-SDF
14h 16m1 stop
$505United Airlines
Find Deal
sáb., mar. 7 - dom., mar. 15
British Airways Logo
12:00 pm - 5:55 pmSDF-LIS
24h 55m2 stops
British Airways Logo
10:40 am - 9:25 pmLIS-SDF
38h 45m2 stops
$512British Airways
Find Deal
jue., ene. 15 - lun., ene. 19
Multiple Airlines Logo
11:10 am - 9:20 amSDF-LIS
17h 10m3 stops
Multiple Airlines Logo
11:20 am - 10:30 pmLIS-SDF
16h 10m2 stops
$518Multiple Airlines
Find Deal
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 $666 (return) on average. On the other hand, the most expensive months are May and August, when the average cost of round-trip tickets is $1,319 and $1,284 respectively.

Good to know

Low seasonDecember
Cheapest flight$446
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 12% 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 9050 reviews
6.6Food
7.3Comfort
7.1Entertainment
8.1Crew
7.7Boarding
Airline reviews

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

6.0 GoodAnonymous, Nov 2025IAH - MEX
Read more United Airlines reviews

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

from SFO-> FRA flight, AVML meal was significantly less compared to regular meal, especially no Desert, no Bread, no sides.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

This was an older airplane. The cabin was constantly warm to hot throughout the 10 hour flight and there were no vents to personalize air flow. Also since it was an older plane, the material and comfort of the chairs were very uncomfortable. I left my flight with major soreness on my tailbone.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Even though we were delayed, we were able to make our connection

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

I had a positive experience on American. I'm blind and traveling with a guide dog and the flight attendants were so kind, friendly, and helpful towards us. They checked in on us during the flight and they made us feel comfortable and welcomed. There was an hour delay before depature, but overall the flight was a smooth ride. I appreciate that there were no issues on this long flight back home.

We were told the flight was delayed 5 times, then it was moved to the next day.

More choices on snacks. Built-in video screen to enjoy entertainment choices.

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

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

Information on your arrival and departure airports