STL - SDF

$119 Find Cheap Flights from St. Louis to Louisville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Louisville departing on 5/31. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Louisville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Louisville, as well as popular online travel agencies
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.

Cheap Flights from St. Louis to Louisville

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Louisville 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.

Recent round-trip flight deals from St. Louis to Louisville

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Louisville.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Spirit Airlines Logo
10:10 am - 1:12 pmSTL-SDF
26h 02m2 stops
Spirit Airlines Logo
6:48 pm - 9:15 amSDF-STL
15h 27m1 stop
$245Spirit Airlines
Find Deal
Thu, May 8 - Fri, May 9
Spirit Airlines Logo
10:10 am - 11:02 amSTL-SDF
23h 52m3 stops
Spirit Airlines Logo
6:48 pm - 9:15 amSDF-STL
15h 27m1 stop
$262Spirit Airlines
Find Deal
Thu, May 8 - Fri, May 9
Delta Logo
7:04 pm - 12:02 amSTL-SDF
3h 58m1 stop
Delta Logo
8:05 am - 12:37 pmSDF-STL
5h 32m1 stop
$278Delta
Find Deal
Mon, Jun 9 - Tue, Jun 10
American Airlines Logo
4:37 pm - 10:17 pmSTL-SDF
4h 40m1 stop
American Airlines Logo
6:12 am - 12:51 pmSDF-STL
7h 39m2 stops
$283American Airlines
Find Deal
Mon, Jun 9 - Tue, Jun 10
Spirit Airlines Logo
10:10 am - 11:02 amSTL-SDF
23h 52m3 stops
Spirit Airlines Logo
2:07 pm - 9:15 amSDF-STL
20h 08m2 stops
$298Spirit Airlines
Find Deal
Thu, May 8 - Fri, May 9
Southwest Logo
4:35 pm - 12:15 amSTL-SDF
6h 40m2 stops
Southwest Logo
6:05 am - 1:20 pmSDF-STL
8h 15m2 stops
$303Southwest
Find Deal
Mon, Jun 9 - Tue, Jun 10
United Airlines Logo
5:29 pm - 10:30 pmSTL-SDF
4h 01m1 stop
United Airlines Logo
7:00 am - 12:19 pmSDF-STL
6h 19m1 stop
$308United Airlines
Find Deal
Thu, May 8 - Fri, May 9
Spirit Airlines Logo
10:10 am - 11:02 amSTL-SDF
23h 52m3 stops
Spirit Airlines Logo
3:51 pm - 9:15 amSDF-STL
42h 24m3 stops
$364Spirit Airlines
Find Deal
Thu, May 8 - Fri, May 9

KAYAK's insights & trends for St. Louis to Louisville flights

Get data-powered insights and trends into flights from St. Louis to Louisville to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Louisville?

The average price of all round-trip flights from St. Louis to Louisville clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Louisville on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from St. Louis to Louisville. For your return ticket, we recommend flying on a Saturday and avoiding Thursdays for the best deals.

Good to know

Low season

April

High season

March

Cheapest flight

$119
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 35% increase in price.
Flight from St. Louis to Louisville

When to book flights from St. Louis to Louisville

Are your dates flexible? Find out the best times to travel from St. Louis to Louisville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Louisville

  • What is the cheapest flight from St. Louis to Louisville?

    In the last 3 days, the lowest price for a flight from St. Louis to Louisville was $119 for a one-way ticket and $245 for a round-trip.

  • Do I need a passport to fly between St. Louis and Louisville?

    No

  • Which aircraft models fly most regularly from St. Louis to Louisville?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Louisville?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between St. Louis and Louisville, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Louisville, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Louisville are Southwest and Delta. With an average price for the route of $544 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $344 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from St. Louis to Louisville?

    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 St. Louis to Louisville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Louisville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from St. Louis 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 St. Louis to Louisville?

    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 to Louisville with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SDF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Louisville?

    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 to Louisville from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 3 airlines serving from St. Louis to Louisville

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Louisville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Louisville? 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.
8.0
SouthwestOverall score based on 4274 reviews
8.2Boarding
8.0Comfort
7.6Entertainment
7.1Food
8.6Crew
Airline reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

6.0 GoodCarolynn, Mar 2025KOA - SMF
Read more Southwest reviews

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Very good. Sad to learn Southwest is going start to charge for bags

Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

WiFi on the flight was not working. Thus, entertainment options were limited.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Terrible and im avoiding them in the future. My initial flight was delayed causing me to rebook my flight and when speaking with the representative to rebook I explained this is the second time my flights were delayed and they did nothing to help me. I wasn't booked to comfort plus or given a voucher or anything. I was almost late for my meeting that I needed to attend on Monday because of the games delta played delaying my flights even more and putting me in the very back of the plane next to an extremely intoxicated passenger

Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

The WiFi didn't seem as fast as it normally is

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

Very friendly and efficient and smooth boarding. We were even way early arriving at my destination. Thank you.

The trip was very smooth and they provided great customer service

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Wonderful as usual except for other guests that were unruly and not kept in check by the Crew.

The flight was initially delayed, then cancelled. American Airlines says the cancellation was weather related, though the actual weather was not bad in both Washington and Providence and between. There were very few cancellations that day. In fact, AA2120 from Washington, DC to Boston flew with a minor delay at about the same time. So, the weather somehow affected only this particular flight AA5230. The next available flight was the following morning. The American Airlines refused to reimburse accommodation (hotel at DCA)

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Cabin was roomy enough to easily slide my carry on under the seat in front of me!

Everything you need to know for your flight from St. Louis to Louisville

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.