HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$62+ Cheap flights from Kentucky to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Kentucky to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Kentucky to St. Louis

Cheapest flights from Kentucky to St. Louis
Explore the most affordable flight options available from Kentucky to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 3, 2025.

This Trip.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/152:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Tue 12/169:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 12/1$154
This Kiwi.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Thu 12/119:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 12/1$171
This Frontier deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1311:57 amCVG - STL
1 stop11h 36mFrontier
Mon 1/121:07 pmSTL - CVG
1 stop9h 47mFrontier
Deal found 11/30$187
This Kiwi.com deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Thu 12/49:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 11/30$192
This Mytrip deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:57 amCVG - STL
1 stop11h 36mFrontier
Wed 12/103:30 pmSTL - CVG
1 stop25h 14mFrontier
Deal found 11/30$192
This Cheapflightsfares deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/232:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Fri 12/269:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 12/1$193
This Kiwi.com deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/132:35 pmCVG - STL
2 stops20h 12mMultiple Airlines
Mon 1/128:50 amSTL - CVG
1 stop10h 20mMultiple Airlines
Deal found 11/30$202
This Frontier deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:57 amCVG - STL
1 stop11h 36mFrontier
Mon 12/159:54 amSTL - CVG
1 stop6h 50mFrontier
Deal found 12/1$204
This Trip.com deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/162:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Sat 12/209:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 12/1$212
This Kiwi.com deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:35 pmBNA - STL
1 stop4h 01mMultiple Airlines
Sun 12/143:30 pmSTL - BNA
1 stop6h 38mMultiple Airlines
Deal found 11/30$221
This Mytrip deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:33 pmCVG - STL
1 stop6h 00mFrontier
Sun 12/1410:44 pmSTL - CVG
1 stop19h 26mFrontier
Deal found 12/2$221
This Kiwi.com deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/162:35 pmBNA - STL
1 stop4h 01mMultiple Airlines
Wed 12/173:30 pmSTL - BNA
2 stops30h 44mMultiple Airlines
Deal found 12/3$222

Find flight deals from Kentucky to St. Louis

Keep the following information in mind while searching for Kentucky to St. Louis flight deals. Data was last updated December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$148
(Kiwi.com)

One-way from

$62
(Kiwi.com)

Popular in

May

Cheapest in

August

Average price

$249
Provider with most accurate pricing for Louisville Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Lambert-St Louis flights.
Search Deals
From Kentucky to Lambert-St Louis
Search Deals
One-way flight from Kentucky to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kentucky to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
Use the filters below to find and compare flights from Kentucky to St. Louis that are best for you.

Fly from

Kentucky

Fly to

St. Louis

Route

Depart

Return

Price

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 1/8

11:57 am-10:33 pm

1 stop11h 36m

Lambert-St Louis

Mon 1/12

5:06 pm-12:42 am

1 stop6h 36m

$162

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Wed 1/7

12:21 pm-7:29 pm

1 stop8h 08m

Lambert-St Louis

Sat 1/10

3:54 pm-9:21 pm

1 stop4h 27m

$170

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Wed 1/21

12:21 pm-7:29 pm

1 stop8h 08m

Lambert-St Louis

Sat 1/24

11:55 am-5:42 pm

1 stop4h 47m

$170

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 1/22

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Mon 1/26

9:50 am-1:48 pm

1 stop3h 58m

$172

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 1/15

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Thu 1/22

9:50 am-1:48 pm

1 stop3h 58m

$172

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Mon 12/15

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Tue 12/16

9:50 am-1:48 pm

1 stop3h 58m

$172

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Tue 1/20

5:47 pm-11:37 pm

1 stop6h 50m

Lambert-St Louis

Wed 1/21

9:59 am-2:36 pm

1 stop3h 37m

$177

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Mon 1/12

5:20 pm-6:45 pm

Nonstop1h 25m

Lambert-St Louis

Wed 1/14

11:35 am-12:50 pm

Nonstop1h 15m

$186

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 1/1

6:27 am-1:36 pm

1 stop8h 09m

Lambert-St Louis

Thu 1/8

8:13 am-2:48 pm

1 stop5h 35m

$189

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 1/12

5:50 pm-8:43 pm

1 stop3h 53m

Lambert-St Louis

Thu 1/15

6:35 am-1:42 pm

1 stop6h 07m

$195

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 59 results
1
2
3
...
6

Best time to book a flight from Kentucky to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Kentucky with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Kentucky to St. Louis

What is the cheapest month to book a flight from Kentucky to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Kentucky to St. Louis (average of $164). Flying from Kentucky to St. Louis in July is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KY to STL?

Find hourly flight availability from Kentucky to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 3, 2025.

It’s optimal to fly from Kentucky to St. Louis in the afternoon. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight at noon.

Related info for your journey

Find useful and relevant information for your journey from Kentucky to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Kentucky?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Kentucky. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from Kentucky to St. Louis?

    A quick flight from Kentucky to St. Louis can take about 4h 01m. Frontier provides one of the quickest options available for as low as $172. The distance between Kentucky and St. Louis is about 272 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Kentucky to St. Louis?

    Most travelers choose Nashville Intl - Lambert-St Louis, Cincinnati Cinci./N. Kentucky - Lambert-St Louis or Knoxville McGhee Tyson - Lambert-St Louis when deciding on the best route from Kentucky to St. Louis.

  • Can I find deals for flights from Kentucky to St. Louis that include hotel bookings?

    Yes. In addition to deals on Kentucky to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Kentucky to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kentucky to St. Louis.

  • Can I find deals for business class flights from Kentucky to St. Louis?

    Yes. Cheapflights offers flight deals from Kentucky to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Kentucky to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Kentucky to St. Louis (average of $164). Flying from Kentucky to St. Louis in July is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Kentucky to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Denver to St. Louis flights
LaGuardia to St. Louis flights
Newark to St. Louis flights
Dallas/Fort Worth to St. Louis flights
John F Kennedy Intl to St. Louis flights
Los Angeles to Kansas City flights
LaGuardia to Kansas City flights
John F Kennedy Intl to Kansas City flights
Boston to Kansas City flights
Dallas/Fort Worth to Kansas City flights
Dulles Intl to Kansas City flights
Denver to Kansas City flights
Newark to Kansas City flights
O'Hare Intl to Kansas City flights
Hobby to Kansas City flights
Reagan-National to Kansas City flights
Seattle to Kansas City flights
San Francisco to Kansas City flights
Dulles Intl to St. Louis flights
San Francisco to St. Louis flights
Los Angeles to St. Louis flights
Minneapolis to Kansas City flights
Boston to St. Louis flights
Sky Harbor Intl to Kansas City flights
Baltimore to Kansas City flights
Orlando to St. Louis flights
Atlanta to St. Louis flights
Seattle to St. Louis flights
Sky Harbor Intl to St. Louis flights
George Bush Intcntl to Kansas City flights
Atlanta to Kansas City flights
Baltimore to St. Louis flights
Hobby to St. Louis flights
Philadelphia to Kansas City flights
Raleigh to Kansas City flights
Ontario to Kansas City flights
Detroit to Kansas City flights
George Bush Intcntl to St. Louis flights
Detroit to St. Louis flights
Salt Lake City to Kansas City flights
Philadelphia to St. Louis flights
Reagan-National to St. Louis flights
O'Hare Intl to St. Louis flights
San Diego to Kansas City flights
Cleveland to St. Louis flights
Minneapolis to St. Louis flights
Midway to Kansas City flights
Charlotte to St. Louis flights
Miami to Kansas City flights
Fort Lauderdale to St. Louis flights

Top 2 airlines flying from Kentucky to St. Louis

Discover the top 2 airlines that operate flights from Kentucky to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$304FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$228Average$268FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.