$532 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 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

KAYAK searches hundreds of travel sites at once for deals on flights to Portugal

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
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

Tue, Dec 2 - Mon, Dec 8
Multiple Airlines Logo
7:00 am - 9:20 amSDF-LIS
21h 20m2 stops
Multiple Airlines Logo
5:00 am - 10:29 pmLIS-SDF
22h 29m2 stops
$532Multiple Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 18
Multiple Airlines Logo
1:50 pm - 8:55 amSDF-LIS
38h 05m2 stops
Multiple Airlines Logo
2:10 pm - 10:30 pmLIS-SDF
37h 20m2 stops
$536Multiple Airlines
Find Deal
Thu, Jan 15 - Mon, Jan 19
United Airlines Logo
8:29 am - 9:20 amSDF-LIS
19h 51m2 stops
United Airlines Logo
11:20 am - 7:31 pmLIS-SDF
37h 11m2 stops
$539United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
9:15 am - 9:20 amSDF-LIS
19h 05m2 stops
United Airlines Logo
5:00 am - 7:27 pmLIS-SDF
19h 27m2 stops
$541United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
Delta Logo
4:15 pm - 8:00 amSDF-LIS
10h 45m1 stop
Delta Logo
5:30 am - 12:06 amLIS-SDF
23h 36m2 stops
$551Delta
Find Deal
Mon, Nov 10 - Wed, Nov 19
KLM Logo
4:15 pm - 8:00 amSDF-LIS
10h 45m1 stop
KLM Logo
5:00 am - 5:16 pmLIS-SDF
17h 16m2 stops
$595KLM
Find Deal
Wed, Nov 12 - Sun, Nov 23
KLM Logo
4:15 pm - 8:00 amSDF-LIS
10h 45m1 stop
KLM Logo
11:25 am - 12:06 amLIS-SDF
17h 41m2 stops
$645KLM
Find Deal
Wed, Nov 12 - Sun, Nov 23
Delta Logo
10:39 am - 8:40 amSDF-LIS
17h 01m2 stops
Delta Logo
5:00 am - 11:00 pmLIS-SDF
23h 00m2 stops
$650Delta
Find Deal
Thu, Jan 15 - Mon, Jan 19
American Airlines Logo
11:16 am - 9:05 amSDF-LIS
16h 49m1 stop
American Airlines Logo
6:30 am - 6:39 pmLIS-SDF
17h 09m2 stops
$653American Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 18
American Airlines Logo
11:21 am - 7:55 amSDF-LIS
15h 34m1 stop
American Airlines Logo
11:05 am - 9:16 pmLIS-SDF
15h 11m1 stop
$655American 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 December, when tickets cost $625 (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$532
Best time to beat the crowds with an average 36% 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 8995 reviews
6.6Food
7.1Entertainment
7.7Boarding
8.1Crew
7.3Comfort
Airline reviews

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

2.0 MediocreAnonymous, Oct 2025BNA - ORD
Read more United Airlines reviews

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Friendly and professional flight crew. Aside from departure delay after boarding, easy flight and smooth landing.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

My husband and I recently had an unfortunate experience with Lufthansa. At the Philadelphia International airport, the ground staff refused to board us because we didn’t have a current visa stamped on our passports for Frankfurt. We completely understand that this was our mistake. we should have double-checked the visa requirements before our trip. However, the issue that upset us most was how the situation was handled by the staff. They told us they would mark it as “boarding denied due to visa issue”, but instead they recorded it as “no show”. Because of that incorrect entry, our return flight was automatically cancelled as well, which caused additional stress and expense. Mistakes can happen, but we expected more transparency and accuracy from a reputed airline like Lufthansa. It would have made a big difference if the staff had been more careful and considerate in documenting the situation correctly.

Flight was good but there are way to many announcements for credit cards etc.

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

Disliked having to wait a little longer to disembark from the plan when we landed in London

Typically flights with AA are good. The staff are pleasant, welcoming, and efficient.

A couple ladies from the crew were so rude and nasty. Thought they were mad at having to be there especially if you asked a question. This will make me think twice next time if I book a flight with you.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

Poor seat in rear of aircraft Food at Admiral’s Club Terminal D at DFW inedible

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.