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$61+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$123
(Trip.com)

One-way from

$61
(Frontier)

Popular in

May

Cheapest in

August

Average price

$434
Provider with most accurate pricing for Louisville Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Lambert-St Louis flights.
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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. 2% potential increase in price ($8 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Trip.com deal was found by Cheapflights users on 2/20. 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.
Wed 4/24:51 pmCVG - STL
1 stop7h 55mFrontier
Mon 4/285:41 pmSTL - CVG
1 stop6h 31mFrontier
Deal found 2/20$123
This Mytrip deal was found by Cheapflights users on 2/19. 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.
Thu 4/176:00 amBNA - STL
1 stop11h 16mMultiple Airlines
Tue 4/226:11 pmSTL - BNA
1 stop13h 11mMultiple Airlines
Deal found 2/19$147
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/55:36 amBNA - STL
1 stop3h 46mAmerican Airlines
Sat 4/129:18 amSTL - BNA
1 stop4h 20mAmerican Airlines
Deal found 2/19$159
This United Airlines deal was found by Cheapflights users on 2/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/28:00 amBNA - STL
1 stop4h 20mUnited Airlines
Wed 4/910:40 amSTL - BNA
1 stop5h 17mUnited Airlines
Deal found 2/20$168
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Thu 3/132:35 pmBNA - STL
1 stop4h 06mSouthern / Mokulele
Sat 3/159:50 amSTL - BNA
1 stop4h 05mSouthern / Mokulele
Deal found 2/20$172
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/15:45 amTYS - STL
1 stop4h 29mDelta
Tue 4/87:05 amSTL - TYS
1 stop5h 45mDelta
Deal found 2/20$199
This Frontier deal was found by Cheapflights users on 2/20. 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 3/64:23 pmTYS - STL
1 stop17h 53mFrontier
Wed 3/127:03 pmSTL - TYS
1 stop19h 20mFrontier
Deal found 2/20$201
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/108:56 amSDF - STL
1 stop6h 57mAmerican Airlines
Mon 4/1410:17 amSTL - SDF
1 stop8h 12mAmerican Airlines
Deal found 2/19$223
This Mytrip deal was found by Cheapflights users on 2/20. 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 3/147:16 pmSDF - STL
1 stop14h 53mSpirit Airlines
Sun 3/236:47 pmSTL - SDF
1 stop27h 11mSpirit Airlines
Deal found 2/20$231
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/55:53 pmLEX - STL
1 stop4h 56mDelta
Sun 3/96:50 amSTL - LEX
1 stop3h 33mDelta
Deal found 2/19$239
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/195:20 pmBNA - STL
1 stop4h 55mSouthwest
Thu 3/205:35 pmSTL - BNA
Nonstop1h 10mSouthwest
Deal found 2/19$247
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/185:30 amCVG - STL
1 stop6h 08mAmerican Airlines
Wed 3/191:51 pmSTL - CVG
1 stop4h 37mAmerican Airlines
Deal found 2/19$247

Find flights from Kentucky to St. Louis within your budget

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 February 20, 2025.

Fly from

Kentucky

Fly to

St. Louis

Route

Depart

Return

Price

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 4/2

4:51 pm-11:46 pm

1 stop7h 55m

Lambert-St Louis

Mon 4/28

5:41 pm-1:12 am

1 stop6h 31m

$123

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 4/17

6:00 am-5:16 pm

1 stop11h 16m

Lambert-St Louis

Tue 4/22

6:11 pm-7:22 am

1 stop13h 11m

$147

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Sat 4/5

5:36 am-9:22 am

1 stop3h 46m

Lambert-St Louis

Sat 4/12

9:18 am-1:38 pm

1 stop4h 20m

$159

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Wed 4/2

8:00 am-12:20 pm

1 stop4h 20m

Lambert-St Louis

Wed 4/9

10:40 am-3:57 pm

1 stop5h 17m

$168

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 3/13

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Sat 3/15

9:50 am-1:55 pm

1 stop4h 05m

$172

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 4/1

5:45 am-9:14 am

1 stop4h 29m

Lambert-St Louis

Tue 4/8

7:05 am-1:50 pm

1 stop5h 45m

$199

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Thu 3/6

4:23 pm-9:16 am

1 stop17h 53m

Lambert-St Louis

Wed 3/12

7:03 pm-3:23 pm

1 stop19h 20m

$201

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Thu 4/10

8:56 am-2:53 pm

1 stop6h 57m

Lambert-St Louis

Mon 4/14

10:17 am-7:29 pm

1 stop8h 12m

$223

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Fri 3/14

7:16 pm-9:09 am

1 stop14h 53m

Lambert-St Louis

Sun 3/23

6:47 pm-10:58 pm

1 stop27h 11m

$231

LexingtonSt. Louis

LEX - STL

LEXSTL

Lexington Blue Grass

Wed 3/5

5:53 pm-9:49 pm

1 stop4h 56m

Lambert-St Louis

Sun 3/9

6:50 am-11:23 am

1 stop3h 33m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 52 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.

Travel insights for flights from Kentucky to St. Louis

Get recent, data-driven insights about flights from Kentucky to St. Louis including ideal travel times, pricing trends, and more.

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 February 20, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated February 20, 2025.
Read reviews from past customers who have flown Southwest, Delta and United Airlines from Kentucky to St. Louis. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Food

7.1

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Food

7.1

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Food

7.1

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Food

7.1

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Food

7.1

Entertainment

7.6

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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.

  • 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 $61 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $69 and Southern / Mokulele from $83 one-way.

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

    Most travelers choose Cincinnati Cinci./N. Kentucky - Lambert-St Louis, Nashville Intl - 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 $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 Kentucky?

Book flights to Kentucky if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$192Average$326FlexibilityNo cancel feeOn-time71%
DeltaCheapest$217Average$303FlexibilityNo cancel feeOn-timeN/A
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