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St. Louis

$81+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — STL
May 5 — May 121
Mon 5/5
Mon 5/12
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 April 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$172
(Cheapflightsfares)

One-way from

$81
(Trip.com)

Popular in

May

Cheapest in

August

Average price

$291
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. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
Mon 5/52:35 pmBNA - STL
1 stop4h 06mSouthern / Mokulele
Thu 5/89:50 amSTL - BNA
1 stop4h 05mSouthern / Mokulele
Deal found 4/28$172
This Booking.com deal was found by Cheapflights users on 4/29. 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.
Tue 5/1312:57 pmCVG - STL
1 stop12h 09mFrontier
Tue 5/205:45 pmSTL - CVG
1 stop23h 49mFrontier
Deal found 4/29$180
This CheapOair deal was found by Cheapflights users on 4/29. 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.
Mon 5/510:01 amBNA - STL
1 stop14h 05mFrontier
Sat 5/108:15 pmSTL - BNA
1 stop22h 37mFrontier
Deal found 4/29$181
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sat 5/2412:55 pmBNA - STL
Nonstop1h 15mSouthwest
Sun 5/2511:50 amSTL - BNA
Nonstop1h 10mSouthwest
Deal found 4/29$183
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 6/42:29 pmBNA - STL
1 stop6h 57mAmerican Airlines
Sat 6/76:00 amSTL - BNA
1 stop5h 39mAmerican Airlines
Deal found 4/29$189
This Delta deal was found by Cheapflights users on 4/29. 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.
Sat 5/2410:30 amBNA - STL
1 stop4h 05mDelta
Sun 5/255:40 pmSTL - BNA
1 stop5h 16mDelta
Deal found 4/29$203
This CheapOair deal was found by Cheapflights users on 4/29. 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.
Tue 5/62:35 pmBNA - STL
1 stop4h 06mMultiple Airlines
Wed 5/78:15 pmSTL - BNA
1 stop22h 37mMultiple Airlines
Deal found 4/29$204
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 5/2312:02 pmTYS - STL
1 stop8h 45mAmerican Airlines
Sun 5/257:00 amSTL - TYS
1 stop6h 05mAmerican Airlines
Deal found 4/29$229
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 5/237:59 pmLEX - STL
1 stop4h 39mDelta
Mon 5/266:00 amSTL - LEX
1 stop5h 19mDelta
Deal found 4/29$229
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Mon 6/95:56 pmCVG - STL
1 stop5h 49mUnited Airlines
Tue 6/1011:20 amSTL - CVG
1 stop4h 36mUnited Airlines
Deal found 4/29$242
This American Airlines deal was found by Cheapflights users on 4/28. 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 5/136:03 pmLEX - STL
2 stops6h 48mAmerican Airlines
Sat 5/175:12 amSTL - LEX
1 stop4h 16mAmerican Airlines
Deal found 4/28$244
This Southwest deal was found by Cheapflights users on 4/28. 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.
Mon 6/24:50 pmCVG - STL
1 stop6h 55mSouthwest
Wed 6/412:50 pmSTL - CVG
2 stops8h 45mSouthwest
Deal found 4/28$247

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 April 30, 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

Thu 5/29

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Thu 6/5

9:50 am-1:55 pm

1 stop4h 05m

$172

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Tue 5/13

12:57 pm-12:06 am

1 stop12h 09m

Lambert-St Louis

Tue 5/20

5:45 pm-6:34 pm

1 stop23h 49m

$180

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Mon 5/5

10:01 am-12:06 am

1 stop14h 05m

Lambert-St Louis

Sat 5/10

8:15 pm-6:52 pm

1 stop22h 37m

$181

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Sat 5/24

12:55 pm-2:10 pm

Nonstop1h 15m

Lambert-St Louis

Sun 5/25

11:50 am-1:00 pm

Nonstop1h 10m

$183

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Wed 6/4

2:29 pm-9:26 pm

1 stop6h 57m

Lambert-St Louis

Sat 6/7

6:00 am-11:39 am

1 stop5h 39m

$189

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Sat 5/24

10:30 am-2:35 pm

1 stop4h 05m

Lambert-St Louis

Sun 5/25

5:40 pm-10:56 pm

1 stop5h 16m

$203

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Tue 5/6

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Wed 5/7

8:15 pm-6:52 pm

1 stop22h 37m

$204

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Fri 5/23

12:02 pm-7:47 pm

1 stop8h 45m

Lambert-St Louis

Sun 5/25

7:00 am-2:05 pm

1 stop6h 05m

$229

LexingtonSt. Louis

LEX - STL

LEXSTL

Lexington Blue Grass

Fri 5/23

7:59 pm-11:38 pm

1 stop4h 39m

Lambert-St Louis

Mon 5/26

6:00 am-12:19 pm

1 stop5h 19m

$229

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Mon 6/9

5:56 pm-10:45 pm

1 stop5h 49m

Lambert-St Louis

Tue 6/10

11:20 am-4:56 pm

1 stop4h 36m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 April 30, 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 April 30, 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
4,295 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Entertainment

7.6

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Southwest
8.0
Very good
4,295 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Entertainment

7.6

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
Delta
8.0
Very good
7,929 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Entertainment

7.6

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
United Airlines
7.4
Good
8,696 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Entertainment

7.6

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,295 reviews

Boarding

8.2

Comfort

8.0

Food

7.1

Entertainment

7.6

Crew

8.6

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Gina,Apr 2025

LAS - DEN

Good, the crew was friendly and helpful. The pilot had great skills in keeping the plane stable through rough turbulence. Smooth landing, too! Thank you!

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 $81 on Southern / Mokulele. Other airlines that offer cheap prices include Frontier from $86 and Southwest from $92 one-way.

  • 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 Lexington Blue Grass - 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
O'Fallon

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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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$226Average$306FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$248Average$288FlexibilityNo cancel feeOn-time71%

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