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St. Louis

$77+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
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 March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$158
(Frontier)

One-way from

$77
(Trip.com)

Popular in

May

Cheapest in

August

Average price

$460
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 March 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 March 31, 2025.

This Frontier deal was found by Cheapflights users on 3/30. 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.
Fri 5/97:29 pmCVG - STL
1 stop5h 45mFrontier
Mon 5/125:45 pmSTL - CVG
1 stop6h 14mFrontier
Deal found 3/30$158
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/257:49 pmBNA - STL
1 stop14h 12mFrontier
Sat 5/38:15 pmSTL - BNA
1 stop22h 37mFrontier
Deal found 3/30$160
This Cheapflightsfares deal was found by Cheapflights users on 3/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/112:35 pmBNA - STL
1 stop4h 06mSouthern / Mokulele
Mon 4/219:50 amSTL - BNA
1 stop4h 05mSouthern / Mokulele
Deal found 3/30$172
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:30 amTYS - STL
1 stop5h 06mDelta
Tue 5/66:00 amSTL - TYS
1 stop4h 09mDelta
Deal found 3/30$199
This Southwest deal was found by Cheapflights users on 3/31. 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.
Thu 4/248:10 amBNA - STL
Nonstop1h 20mSouthwest
Mon 4/283:45 pmSTL - BNA
Nonstop1h 10mSouthwest
Deal found 3/31$205
This American Airlines deal was found by Cheapflights users on 3/31. 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 4/264:10 pmTYS - STL
1 stop7h 15mAmerican Airlines
Sun 4/275:00 amSTL - TYS
1 stop4h 38mAmerican Airlines
Deal found 3/31$214
This Delta deal was found by Cheapflights users on 3/31. 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 5/149:26 amBNA - STL
1 stop5h 09mDelta
Wed 5/217:05 amSTL - BNA
1 stop4h 06mDelta
Deal found 3/31$225
This Mytrip deal was found by Cheapflights users on 3/31. 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 4/242:35 pmBNA - STL
1 stop4h 06mMultiple Airlines
Mon 4/2812:15 pmSTL - BNA
3 stops35h 28mMultiple Airlines
Deal found 3/31$233
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:12 pmCVG - STL
1 stop4h 24mDelta
Tue 5/67:10 amSTL - CVG
1 stop3h 42mDelta
Deal found 3/30$237
This Delta deal was found by Cheapflights users on 3/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/302:37 pmSDF - STL
1 stop4h 25mDelta
Wed 5/76:00 amSTL - SDF
1 stop5h 01mDelta
Deal found 3/30$237
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/179:00 amCVG - STL
1 stop4h 19mUnited Airlines
Sat 5/175:29 pmSTL - CVG
1 stop3h 37mUnited Airlines
Deal found 3/30$249
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:25 amCVG - STL
2 stops11h 20mSouthwest
Tue 5/62:55 pmSTL - CVG
1 stop6h 40mSouthwest
Deal found 3/30$278

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 March 31, 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

Fri 5/9

7:29 pm-12:14 am

1 stop5h 45m

Lambert-St Louis

Mon 5/12

5:45 pm-12:59 am

1 stop6h 14m

$158

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 4/25

7:49 pm-10:01 am

1 stop14h 12m

Lambert-St Louis

Sat 5/3

8:15 pm-6:52 pm

1 stop22h 37m

$160

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 4/11

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Mon 4/21

9:50 am-1:55 pm

1 stop4h 05m

$172

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 4/29

5:30 am-9:36 am

1 stop5h 06m

Lambert-St Louis

Tue 5/6

6:00 am-11:09 am

1 stop4h 09m

$199

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 4/24

8:10 am-9:30 am

Nonstop1h 20m

Lambert-St Louis

Mon 4/28

3:45 pm-4:55 pm

Nonstop1h 10m

$205

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Sat 4/26

4:10 pm-10:25 pm

1 stop7h 15m

Lambert-St Louis

Sun 4/27

5:00 am-10:38 am

1 stop4h 38m

$214

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Wed 5/14

9:26 am-2:35 pm

1 stop5h 09m

Lambert-St Louis

Wed 5/21

7:05 am-11:11 am

1 stop4h 06m

$225

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 4/24

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Mon 4/28

12:15 pm-11:43 pm

3 stops35h 28m

$233

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 4/29

6:12 pm-9:36 pm

1 stop4h 24m

Lambert-St Louis

Tue 5/6

7:10 am-11:52 am

1 stop3h 42m

$237

LouisvilleSt. Louis

SDF - STL

SDFSTL

Louisville Intl

Wed 4/30

2:37 pm-6:02 pm

1 stop4h 25m

Lambert-St Louis

Wed 5/7

6:00 am-12:01 pm

1 stop5h 01m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 50 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 March 31, 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 March 31, 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
8.0
Very good
4,276 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,276 reviews
Southwest
8.0
Very good
4,276 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,899 reviews
Southwest
8.0
Very good
4,276 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,614 reviews
Southwest
8.0
Very good
4,276 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,276 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 $77 on Southern / Mokulele. Other airlines that offer cheap prices include Frontier from $87 and American Airlines from $100 one-way.

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

    Most travelers choose Cincinnati Cinci./N. Kentucky - Lambert-St Louis, Knoxville McGhee Tyson - Lambert-St Louis or Nashville Intl - 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
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$226Average$311FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$228Average$288FlexibilityNo cancel feeOn-time71%
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