SDF - STL

$91 Find Cheap Flights from Louisville to St. Louis

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 St. Louis departing on 9/9. 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

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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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, Sep 9 - Wed, Sep 10
American Airlines Logo
7:00 am - 1:23 pmSDF-STL
7h 23m1 stop
American Airlines Logo
6:29 am - 12:28 pmSTL-SDF
4h 59m1 stop
$229American Airlines
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Sat, Sep 20 - Mon, Sep 22
American Airlines Logo
7:00 am - 3:24 pmSDF-STL
9h 24m1 stop
American Airlines Logo
2:11 pm - 9:36 pmSTL-SDF
6h 25m1 stop
$238American Airlines
Find Deal
Sat, Sep 20 - Mon, Sep 22
United Airlines Logo
10:55 am - 2:19 pmSDF-STL
4h 24m1 stop
United Airlines Logo
5:30 pm - 10:24 pmSTL-SDF
3h 54m1 stop
$251United Airlines
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Fri, Sep 19 - Sun, Sep 21
 Logo
10:14 am - 9:06 amSDF-STL
23h 52m2 stops
 Logo
10:35 am - 10:04 pmSTL-SDF
10h 29m1 stop
Fri, Sep 19 - Sun, Sep 21
United Airlines Logo
9:05 am - 2:19 pmSDF-STL
6h 14m1 stop
United Airlines Logo
5:30 pm - 10:24 pmSTL-SDF
3h 54m1 stop
$319United Airlines
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Thu, Oct 2 - Thu, Oct 9
 Logo
4:20 pm - 9:06 amSDF-STL
17h 46m2 stops
 Logo
10:57 am - 9:01 amSTL-SDF
21h 04m1 stop
Sat, Sep 20 - Mon, Sep 22
Southwest Logo
6:35 am - 2:15 pmSDF-STL
8h 40m2 stops
Southwest Logo
7:50 am - 4:45 pmSTL-SDF
7h 55m2 stops
$364Southwest
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Tue, Sep 9 - Wed, Sep 10
Southwest Logo
1:15 pm - 8:00 pmSDF-STL
7h 45m2 stops
Southwest Logo
7:10 am - 3:15 pmSTL-SDF
7h 05m2 stops
$436Southwest
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Fri, Sep 5 - Sat, Sep 6
Delta Logo
10:45 am - 4:06 pmSDF-STL
6h 21m1 stop
Delta Logo
10:45 am - 6:16 pmSTL-SDF
6h 31m1 stop
$453Delta
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Mon, Sep 1 - Tue, Sep 2
Delta Logo
6:00 am - 9:15 amSDF-STL
4h 15m1 stop
Delta Logo
10:20 am - 5:06 pmSTL-SDF
5h 46m1 stop
$504Delta
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$91
Best time to beat the crowds with an average 42% drop in price.
Most popular time to fly with an average 24% 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 $91 for a one-way ticket and $229 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?

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

  • 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 7982 reviews
7.9Comfort
7.9Entertainment
8.5Crew
7.3Food
8.2Boarding
Airline reviews

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

6.0 GoodKristopher, Aug 2025HPN - ATL
Read more Delta reviews

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

On this flight I felt the food offering was not as complete as on previous flights. The tomato salad was a bit off and there was nothing additional such a bread or butter. The breakfast was only one option, so you either ate what they had or ate nothing. The crew was efficient, but most seemed frustrated throughout the flight. The flight arrived early and was obstacle-free, so I’m overall quite happy, but the shine in the rest of the experience just wasn’t there.

The seats got pretty uncomfortable pretty fast. The armrests are bigger than on other planes, so I had less room in the actual seat. My butt hurt by the end of the flight. :/ comfort was the primary issue. The crew were fantastic!

I believe that a four-hour trip should have a meal. Delta had none.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

There was supposed to be a meal served, but there wasn’t and the major toilet was out of order

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

Information on your arrival and departure airports

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