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St. Louis

$70+ 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 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheap 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 September 19, 2025.

Round-trip from

$143
(Priceline)

One-way from

$70
(Kiwi.com)

Popular in

October

Cheapest in

August

Average price

$334
From Kentucky to Lambert-St Louis
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One-way flight from Kentucky to Lambert-St Louis
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Highest demand for flights based on searches. 10% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 19, 2025.

This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/135:10 amCVG - STL
1 stop9h 07mFrontier
Mon 11/172:12 pmSTL - CVG
1 stop8h 59mFrontier
Deal found 9/17$143
This KAYAK deal was found by Cheapflights users on 9/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Mon 10/69:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 9/18$156
This KAYAK deal was found by Cheapflights users on 9/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Sat 9/279:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 9/17$157
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:38 pmBNA - STL
1 stop11h 28mFrontier
Sun 9/281:52 pmSTL - BNA
1 stop21h 01mFrontier
Deal found 9/17$158
This Booking.com deal was found by Cheapflights users on 9/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/65:20 amCVG - STL
1 stop16h 17mFrontier
Thu 10/911:32 amSTL - CVG
1 stop4h 33mFrontier
Deal found 9/17$158
This Frontier deal was found by Cheapflights users on 9/17. 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.
Mon 9/295:20 amCVG - STL
1 stop8h 42mFrontier
Thu 10/210:49 amSTL - CVG
1 stop12h 10mFrontier
Deal found 9/17$159
This Trip.com deal was found by Cheapflights users on 9/17. 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 10/66:15 amBNA - STL
1 stop26h 52mMultiple Airlines
Thu 10/99:50 amSTL - BNA
1 stop3h 58mMultiple Airlines
Deal found 9/17$163
This Booking.com deal was found by Cheapflights users on 9/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/208:15 amCVG - STL
1 stop12h 11mFrontier
Fri 10/246:42 pmSTL - CVG
1 stop18h 00mFrontier
Deal found 9/18$171
This Southern / Mokulele deal was found by Cheapflights users on 9/18. 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 Southern / Mokulele is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/32:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Tue 10/79:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 9/18$172
This Frontier deal was found by Cheapflights users on 9/18. 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.
Mon 10/138:15 amCVG - STL
1 stop12h 11mFrontier
Thu 10/1611:32 amSTL - CVG
1 stop4h 33mFrontier
Deal found 9/18$172
This Expedia deal was found by Cheapflights users on 9/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:35 pmBNA - STL
1 stop4h 01mSouthern / Mokulele
Mon 10/69:50 amSTL - BNA
1 stop3h 58mSouthern / Mokulele
Deal found 9/17$173
This Frontier deal was found by Cheapflights users on 9/18. 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.
Sun 10/125:10 amCVG - STL
1 stop8h 36mFrontier
Sun 10/126:05 pmSTL - CVG
1 stop5h 37mFrontier
Deal found 9/18$179

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 September 19, 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

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 10/3

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Mon 10/6

9:50 am-1:48 pm

1 stop3h 58m

$156

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 10/10

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Sat 10/11

9:50 am-1:48 pm

1 stop3h 58m

$157

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 10/17

6:12 am-9:07 am

1 stop26h 55m

Lambert-St Louis

Fri 10/24

7:52 pm-3:43 pm

1 stop19h 51m

$158

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 11/7

1:27 pm-9:07 am

1 stop20h 40m

Lambert-St Louis

Mon 11/10

2:12 pm-12:11 am

1 stop8h 59m

$158

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 9/29

5:20 am-1:02 pm

1 stop8h 42m

Lambert-St Louis

Thu 10/2

10:49 am-11:59 pm

1 stop12h 10m

$159

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Fri 10/24

9:10 pm-3:56 pm

1 stop19h 46m

Lambert-St Louis

Sat 10/25

7:52 pm-7:51 pm

1 stop22h 59m

$171

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 10/3

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Tue 10/7

9:50 am-1:48 pm

1 stop3h 58m

$172

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 11/7

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Mon 11/10

9:50 am-1:48 pm

1 stop3h 58m

$172

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 10/17

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Mon 10/20

9:50 am-1:48 pm

1 stop3h 58m

$173

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Sun 10/5

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Sun 10/12

7:52 pm-10:40 am

1 stop14h 48m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/18

Showing 1-10 of 60 results
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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 $311). Flying from Kentucky to St. Louis in March is currently the most expensive (average of $356). 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 September 19, 2025.

When flying from Kentucky to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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. Southern / Mokulele provides one of the quickest options available for as low as $156. 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 cheapest airlines to fly from Kentucky to St. Louis one-way?

    One-way options have recently been found by users for as low as $83 on Southern / Mokulele. Other airlines that offer cheap prices include Frontier from $85 and American Airlines from $97 one-way.

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

    Most travelers choose Nashville Intl - Lambert-St Louis, Knoxville McGhee Tyson - Lambert-St Louis or Cincinnati Cinci./N. Kentucky - 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 $311). Flying from Kentucky to St. Louis in March is currently the most expensive (average of $356). 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
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Kentucky to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$204Average$321FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$228Average$288FlexibilityNo cancel feeOn-time71%

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