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 $79 on Southern / Mokulele. Other airlines that offer cheap prices include Frontier from $80 and Spirit Airlines from $90 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 Knoxville McGhee Tyson - Lambert-St Louis when deciding on the best route from Kentucky to St. Louis.

What is the cheapest month to fly from Kentucky to St. Louis?

August is one of the best times of the year to fly to St. Louis from Kentucky. Prices for August average $339 per person but you can even find prices for as low as $192. The most expensive prices can be found in the month of May. Opting for a August flight can save you 40% on your journey compared to booking in May

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.

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.

$79+ Flights from Kentucky to St. Louis

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Cheap flight deals from Kentucky to St. Louis

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$161 (CheapOair)
One-way from	$79 (Trip.com)
Popular in	May
Cheapest in	August
Average price	$291

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. 0% potential increase in price ($3 potential increase over avg. RT price).

Search Deals

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 22, 2025.

Thu 5/157:52 pmBNA - STL

1 stop13h 17mFrontier

Sun 5/185:45 pmSTL - BNA

1 stop15h 24mFrontier

Deal found 4/22

$161

Thu 5/12:35 pmBNA - STL

1 stop4h 06mSouthern / Mokulele

Mon 5/59:50 amSTL - BNA

1 stop4h 05mSouthern / Mokulele

Deal found 4/22

$172

Wed 8/63:15 pmBNA - STL

1 stop8h 34mAmerican Airlines

Mon 8/117:23 amSTL - BNA

1 stop7h 22mAmerican Airlines

Deal found 4/21

$183

Fri 5/22:35 pmBNA - STL

1 stop4h 06mMultiple Airlines

Sun 5/45:45 pmSTL - BNA

1 stop15h 24mMultiple Airlines

Deal found 4/22

$193

Mon 5/129:15 pmBNA - STL

Nonstop1h 15mSouthwest

Tue 5/135:00 pmSTL - BNA

Nonstop1h 10mSouthwest

Deal found 4/21

$194

Thu 5/112:57 pmCVG - STL

1 stop12h 09mFrontier

Fri 5/25:55 pmSTL - CVG

1 stop6h 04mFrontier

Deal found 4/21

$198

Thu 5/295:30 pmTYS - STL

1 stop16h 39mFrontier

Sat 5/317:55 pmSTL - TYS

1 stop19h 34mFrontier

Deal found 4/21

$218

Tue 6/105:45 amTYS - STL

1 stop3h 38mDelta

Sat 6/145:23 pmSTL - TYS

1 stop5h 36mDelta

Deal found 4/21

$229

Thu 6/57:59 pmLEX - STL

1 stop4h 39mDelta

Thu 6/129:28 amSTL - LEX

1 stop4h 40mDelta

Deal found 4/22

$229

Mon 5/266:10 amTYS - STL

1 stop5h 33mAmerican Airlines

Sat 5/315:19 amSTL - TYS

1 stop5h 22mAmerican Airlines

Deal found 4/22

$234

Sat 5/178:15 amBNA - STL

1 stop3h 39mDelta

Mon 5/197:06 pmSTL - BNA

1 stop3h 50mDelta

Deal found 4/21

$241

Tue 5/66:03 pmLEX - STL

2 stops6h 48mAmerican Airlines

Sat 5/107:00 amSTL - LEX

1 stop5h 45mAmerican Airlines

Deal found 4/21

$244

Best flights from Kentucky to St. Louis
Discover carefully curated flight deals from Kentucky to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2025.

Thu 5/157:52 pmBNA - STL

1 stop13h 17mFrontier

Sun 5/185:45 pmSTL - BNA

1 stop15h 24mFrontier

Deal found 4/22

$161

Fri 5/92:35 pmBNA - STL

1 stop4h 06mSouthern / Mokulele

Sat 5/109:50 amSTL - BNA

1 stop4h 05mSouthern / Mokulele

Deal found 4/21

$172

Wed 8/63:15 pmBNA - STL

1 stop8h 34mAmerican Airlines

Mon 8/117:23 amSTL - BNA

1 stop7h 22mAmerican Airlines

Deal found 4/21

$183

Fri 5/22:35 pmBNA - STL

1 stop4h 06mMultiple Airlines

Sun 5/45:45 pmSTL - BNA

1 stop15h 24mMultiple Airlines

Deal found 4/22

$193

Mon 5/129:15 pmBNA - STL

Nonstop1h 15mSouthwest

Tue 5/135:00 pmSTL - BNA

Nonstop1h 10mSouthwest

Deal found 4/21

$194

Tue 6/105:45 amTYS - STL

1 stop3h 38mDelta

Sat 6/145:23 pmSTL - TYS

1 stop5h 36mDelta

Deal found 4/21

$229

Tue 5/207:00 amTYS - STL

1 stop6h 19mUnited Airlines

Tue 5/275:00 amSTL - TYS

1 stop4h 07mUnited Airlines

Deal found 4/22

$289

Wed 5/75:05 amSDF - STL

1 stop29h 10mSpirit Airlines

Sun 5/1110:10 amSTL - SDF

2 stops26h 02mSpirit Airlines

Deal found 4/21

$367

Thu 5/295:30 pmTYS - STL

1 stop16h 39mFrontier

Sat 5/317:55 pmSTL - TYS

1 stop19h 34mFrontier

Deal found 4/21

$218

Thu 7/177:45 pmLEX - STL

1 stop4h 54mDelta

Sat 7/197:20 amSTL - LEX

1 stop4h 16mDelta

Deal found 4/22

$229

Mon 5/266:10 amTYS - STL

1 stop5h 33mAmerican Airlines

Sat 5/315:19 amSTL - TYS

1 stop5h 22mAmerican Airlines

Deal found 4/22

$234

Fri 5/2312:32 pmCVG - STL

1 stop12h 20mFrontier

Mon 5/265:45 pmSTL - CVG

1 stop6h 06mFrontier

Deal found 4/21

$220

Last-minute flights from Kentucky to St. Louis
Discover last-minute flight deals from Kentucky to St. Louis. Data last updated April 22, 2025 and is based on user searches.

Tue 4/225:30 amTYS - STL

1 stop5h 06mDelta

Tue 4/2910:42 amSTL - TYS

1 stop4h 32mDelta

Deal found 4/21

$279

Sun 4/278:30 amCVG - STL

1 stop3h 54mAmerican Airlines

Sat 5/37:04 pmSTL - CVG

1 stop4h 07mAmerican Airlines

Deal found 4/21

$491

Mon 4/2811:04 amSDF - STL

1 stop5h 43mUnited Airlines

Tue 4/295:35 pmSTL - SDF

1 stop3h 55mUnited Airlines

Deal found 4/21

$504

Mon 4/281:05 pmSDF - STL

2 stops6h 25mSouthwest

Tue 4/299:55 amSTL - SDF

1 stop7h 50mSouthwest

Deal found 4/21

$509

Tue 4/297:37 pmTRI - STL

1 stop4h 59mDelta

Sun 5/47:10 amSTL - TRI

1 stop4h 05mDelta

Deal found 4/21

$477

Tue 4/2911:11 amTRI - STL

2 stops7h 51mAmerican Airlines

Sun 5/47:19 amSTL - TRI

1 stop5h 48mAmerican Airlines

Deal found 4/22

$532

Wed 4/306:00 pmLEX - STL

1 stop4h 36mDelta

Sat 5/37:10 amSTL - LEX

1 stop4h 09mDelta

Deal found 4/22

$269

Wed 4/306:04 pmLEX - STL

2 stops6h 29mAmerican Airlines

Sat 5/312:00 pmSTL - LEX

1 stop3h 26mAmerican Airlines

Deal found 4/22

$319

Thu 5/12:35 pmBNA - STL

1 stop4h 06mSouthern / Mokulele

Mon 5/59:50 amSTL - BNA

1 stop4h 05mSouthern / Mokulele

Deal found 4/22

$172

Thu 5/112:57 pmCVG - STL

1 stop12h 09mFrontier

Fri 5/25:55 pmSTL - CVG

1 stop6h 04mFrontier

Deal found 4/21

$198

Thu 5/14:50 pmCVG - STL

1 stop6h 55mSouthwest

Fri 5/27:30 amSTL - CVG

2 stops7h 35mSouthwest

Deal found 4/21

$512

Fri 5/22:35 pmBNA - STL

1 stop4h 06mMultiple Airlines

Sun 5/45:45 pmSTL - BNA

1 stop15h 24mMultiple Airlines

Deal found 4/22

$193

One-way flights from Kentucky to St. Louis
Search for one-way flight options from Kentucky to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 22, 2025.

Thu 5/152:35 pmBNA - STL

1 stop4h 06mSouthern / Mokulele

Deal found 4/21

$79

Fri 5/167:29 pmCVG - STL

1 stop5h 45mFrontier

Deal found 4/22

$80

Wed 5/286:40 pmBNA - STL

1 stop14h 35mSpirit Airlines

Deal found 4/21

$90

Tue 7/155:36 amBNA - STL

1 stop7h 12mAmerican Airlines

Deal found 4/22

$91

Wed 5/217:05 amCVG - STL

1 stop9h 16mAmerican Airlines

Deal found 4/22

$91

Thu 5/155:45 amSDF - STL

1 stop8h 22mAmerican Airlines

Deal found 4/22

$91

Wed 5/145:02 pmTYS - STL

1 stop17h 13mMultiple Airlines

Deal found 4/20

$96

Wed 5/287:00 amLEX - STL

1 stop6h 20mUnited Airlines

Deal found 4/22

$100

Sat 5/243:43 pmBNA - STL

1 stop4h 56mDelta

Deal found 4/22

$102

Thu 5/1510:25 amBNA - STL

Nonstop1h 20mSouthwest

Deal found 4/21

$103

Wed 5/286:03 pmLEX - STL

2 stops6h 48mAmerican Airlines

Deal found 4/22

$105

Sun 6/228:50 pmBNA - STL

1 stop27h 03mFrontier

Deal found 4/22

$108

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kentucky to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 5/15

7:52 pm-9:09 am

1 stop13h 17m

Lambert-St Louis

Sun 5/18

5:45 pm-9:09 am

1 stop15h 24m

$161

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Thu 5/1

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Mon 5/5

9:50 am-1:55 pm

1 stop4h 05m

$172

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 5/2

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Sun 5/4

5:45 pm-9:09 am

1 stop15h 24m

$193

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Mon 5/12

9:15 pm-10:30 pm

Nonstop1h 15m

Lambert-St Louis

Tue 5/13

5:00 pm-6:10 pm

Nonstop1h 10m

$194

CincinnatiSt. Louis

CVG - STL

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 5/1

12:57 pm-12:06 am

1 stop12h 09m

Lambert-St Louis

Fri 5/2

5:55 pm-12:59 am

1 stop6h 04m

$198

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Thu 5/29

5:30 pm-9:09 am

1 stop16h 39m

Lambert-St Louis

Sat 5/31

7:55 pm-4:29 pm

1 stop19h 34m

$218

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Wed 6/4

5:32 am-1:07 pm

1 stop7h 35m

Lambert-St Louis

Fri 6/6

6:00 am-1:00 pm

1 stop7h 00m

$220

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 6/10

5:45 am-8:23 am

1 stop3h 38m

Lambert-St Louis

Sat 6/14

5:23 pm-11:59 pm

1 stop5h 36m

$229

LexingtonSt. Louis

LEX - STL

LEXSTL

Lexington Blue Grass

Thu 7/17

7:45 pm-11:39 pm

1 stop4h 54m

Lambert-St Louis

Sat 7/19

7:20 am-12:36 pm

1 stop4h 16m

$229

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Mon 5/26

6:10 am-10:43 am

1 stop5h 33m

Lambert-St Louis

Sat 5/31

5:19 am-11:41 am

1 stop5h 22m

$234

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 59 results

...

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?

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

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

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

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

4,287 reviews

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

4,287 reviews

Southwest

8.0

Very good

4,287 reviews

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

7,920 reviews

Southwest

8.0

Very good

4,287 reviews

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

8,683 reviews

Southwest

8.0

Very good

4,287 reviews

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

4,287 reviews

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!

Sun Country Air

6.9

Okay

349 reviews

Southwest

8.0

Very good

4,287 reviews

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

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 $79 on Southern / Mokulele. Other airlines that offer cheap prices include Frontier from $80 and Spirit Airlines from $90 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 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

Fenton

Maryland Heights

Fairview Heights

Collinsville

Wentzville

Eureka

St. Peters

Festus

Glencoe

Alton

Farmington

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Kentucky to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$226	Average$311	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$248	Average$288	FlexibilityNo cancel fee	On-time71%

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$79+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kentucky to St. Louis with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

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 22, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Kentucky to St. Louis

Cheapest flights from Kentucky to St. LouisExplore 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 22, 2025.

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 22, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kentucky to St. Louis that are best for you.

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.

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?

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 22, 2025.

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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.

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?

What are the cheapest airlines to fly from Kentucky to St. Louis one-way?

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

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

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

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

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

Traveling to a place near Kentucky?

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.

Top 2 airlines flying from Kentucky to St. Louis

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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 22, 2025.