SDF - STL

$177 Find Cheap Flights from Louisville to St. Louis

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 St. Louis departing on 1/20. 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 St. Louis

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

Cheapest round-trip
$177
Delta
Tue 1/20Wed 1/21
SDF - STL • 1 stop
Cheapest one-way
$229
Typical prices: $153-$187
Multiple Airlines
Sat 12/20
SDF - STL • 2 stops
Top airlines
Delta
Cheapest • from $177 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Louisville to St. Louis (SDF-STL)

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

Tue, Jan 20 - Wed, Jan 21
Delta Logo
5:47 pm - 11:37 pmSDF-STL
6h 50m1 stop
Delta Logo
9:59 am - 2:36 pmSTL-SDF
3h 37m1 stop
$177Delta
Find Deal
Tue, Jan 20 - Wed, Jan 21
Delta Logo
5:47 pm - 11:37 pmSDF-STL
6h 50m1 stop
Delta Logo
7:10 am - 6:14 pmSTL-SDF
10h 04m2 stops
$182Delta
Find Deal
Thu, Jan 1 - Thu, Jan 8
American Airlines Logo
6:27 am - 1:36 pmSDF-STL
8h 09m1 stop
American Airlines Logo
8:13 am - 2:48 pmSTL-SDF
5h 35m1 stop
$189American Airlines
Find Deal
Tue, Jan 20 - Wed, Jan 21
American Airlines Logo
6:00 am - 2:50 pmSDF-STL
9h 50m2 stops
American Airlines Logo
6:00 am - 2:48 pmSTL-SDF
7h 48m2 stops
$229American Airlines
Find Deal
Thu, Jan 1 - Thu, Jan 8
American Airlines Logo
6:27 am - 1:36 pmSDF-STL
8h 09m1 stop
American Airlines Logo
11:05 am - 10:12 pmSTL-SDF
10h 07m2 stops
$252American Airlines
Find Deal
Tue, Jan 20 - Wed, Jan 21
Delta Logo
4:59 pm - 11:25 pmSDF-STL
7h 26m1 stop
Delta Logo
10:19 am - 6:14 pmSTL-SDF
6h 55m1 stop
$257Delta
Find Deal
Tue, Jan 20 - Wed, Jan 21
Delta Logo
5:35 am - 8:53 amSDF-STL
4h 18m1 stop
Delta Logo
1:00 pm - 9:15 pmSTL-SDF
7h 15m2 stops
$262Delta
Find Deal
Fri, Jan 2 - Fri, Jan 9
American Airlines Logo
2:00 pm - 7:31 pmSDF-STL
6h 31m1 stop
American Airlines Logo
6:44 pm - 12:26 pmSTL-SDF
16h 42m1 stop
$264American Airlines
Find Deal
Fri, Jan 30 - Sun, Feb 1
Multiple Airlines Logo
1:55 pm - 11:33 pmSDF-STL
10h 38m1 stop
Multiple Airlines Logo
5:42 pm - 1:00 pmSTL-SDF
18h 18m1 stop
$289Multiple Airlines
Find Deal
Fri, Jan 2 - Fri, Jan 9
American Airlines Logo
5:00 am - 1:36 pmSDF-STL
9h 36m2 stops
American Airlines Logo
6:44 pm - 12:26 pmSTL-SDF
16h 42m1 stop
$293American Airlines
Find Deal
Booking Insights

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

Get data-powered insights and trends into flights from Louisville to St. Louis 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 Louisville to St. Louis?

The average price of all round-trip flights from Louisville to St. Louis clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Louisville to St. Louis, look for departures on Saturdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from St. Louis, Thursday is the cheapest day to fly and Monday is the most expensive.

Good to know

Low seasonAugust
Cheapest flight$177
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Louisville to St. Louis

When to book flights from Louisville to St. Louis

Are your dates flexible? Find out the best times to travel from Louisville to St. Louis 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 Louisville to St. Louis

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

    In the last 3 days, the lowest price for a flight from Louisville to St. Louis was $229 for a one-way ticket and $177 for a round-trip.

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

    No

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

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

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

    SkyTeam is the only airline alliance operating flights between Louisville and St. Louis.

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

    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 St. Louis.

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

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

    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 St. Louis with an airline and back to Louisville with another airline. Booking your flights between Louisville and STL 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 Louisville to St. Louis?

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

Reviews of the top airline flying from Louisville to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Louisville to St. Louis. 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 Louisville to St. Louis? 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.
7.9
DeltaOverall score based on 8011 reviews
8.5Crew
7.9Comfort
7.9Entertainment
8.1Boarding
7.3Food
Airline reviews

Good seats in Main cabin, excellent service and excellent landing

10.0 ExcellentAnonymous, Dec 2025SEA - MSP
Read more Delta reviews

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

This flight was straightforward and without difficulty. Service was OK, but I continue to be underwhelmed by level of attention given to Sky Priority passengers.

It would’ve been nice for all that money to have a more substantial snack for free. I remember once upon a time getting a very nice turkey sandwich with Swiss cheese on whole wheat bread for no charge along with a drink. I guess those days are gone. it’s a little insulting being given a cookie or a bag of baked chips Going forward I’ll just bring my own.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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

Information on your arrival and departure airports