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Cheap flights from Kentucky to St. Louis from $51

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Kentucky to St. Louis departing on 10/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Kentucky to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
7:00 am - 8:15 amBNA  Nashville Intl-STL Lambert-St Louis
1h 15mnonstop
Southwest Logo
2:45 pm - 3:55 pmSTL  Lambert-St Louis-BNA Nashville Intl
1h 10mnonstop
$109Southwest
Sat, Sep 5 - Sun, Sep 6
Frontier Logo
12:43 pm - 1:10 pmCVG  Cincinnati Cinci./N. Kentucky-STL Lambert-St Louis
25h 27m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
2:29 pm - 11:38 amSTL  Lambert-St Louis-CVG Cincinnati Cinci./N. Kentucky
20h 09m1 stop Atlanta Hartsfield-Jackson
$113Frontier
Thu, Sep 10 - Mon, Sep 14
Frontier Logo
12:43 pm - 1:10 pmCVG  Cincinnati Cinci./N. Kentucky-STL Lambert-St Louis
25h 27m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
2:29 pm - 11:38 amSTL  Lambert-St Louis-CVG Cincinnati Cinci./N. Kentucky
20h 09m1 stop Atlanta Hartsfield-Jackson
$114Frontier
Thu, Sep 10 - Mon, Sep 14
Southwest Logo
8:50 pm - 10:10 pmBNA  Nashville Intl-STL Lambert-St Louis
1h 20mnonstop
Southwest Logo
2:45 pm - 3:55 pmSTL  Lambert-St Louis-BNA Nashville Intl
1h 10mnonstop
$117Southwest
Mon, Sep 21 - Tue, Sep 22
Delta Logo
9:37 am - 2:33 pmBNA  Nashville Intl-STL Lambert-St Louis
4h 56m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 10:02 amSTL  Lambert-St Louis-BNA Nashville Intl
4h 02m1 stop Atlanta Hartsfield-Jackson
$157Delta
Sat, Sep 5 - Sun, Sep 6
Southern / Mokulele Logo
9:30 am - 1:21 pmBNA  Nashville Intl-STL Lambert-St Louis
3h 51m1 stop Jonesboro
Southern / Mokulele Logo
2:00 pm - 6:03 pmSTL  Lambert-St Louis-BNA Nashville Intl
4h 03m1 stop Jonesboro
$167Southern / Mokulele
Mon, Nov 16 - Thu, Nov 19
Southern / Mokulele Logo
9:40 am - 1:31 pmBNA  Nashville Intl-STL Lambert-St Louis
3h 51m1 stop Jonesboro
Southern / Mokulele Logo
2:10 pm - 5:53 pmSTL  Lambert-St Louis-BNA Nashville Intl
3h 43m1 stop Jonesboro
$171Southern / Mokulele
Mon, Aug 31 - Thu, Sep 3
United Airlines Logo
7:00 am - 12:03 pmTYS  Knoxville McGhee Tyson-STL Lambert-St Louis
6h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
10:53 am - 4:58 pmSTL  Lambert-St Louis-TYS Knoxville McGhee Tyson
5h 05m1 stop Chicago O'Hare Intl
$208United Airlines
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
7:00 am - 12:02 pmTYS  Knoxville McGhee Tyson-STL Lambert-St Louis
6h 02m1 stop Chicago O'Hare Intl
United Airlines Logo
8:00 am - 1:18 pmSTL  Lambert-St Louis-TYS Knoxville McGhee Tyson
4h 18m1 stop Chicago O'Hare Intl
$216United Airlines
Sun, Sep 6 - Wed, Sep 9
Delta Logo
6:28 pm - 11:42 pmCVG  Cincinnati Cinci./N. Kentucky-STL Lambert-St Louis
6h 14m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:00 am - 11:20 amSTL  Lambert-St Louis-CVG Cincinnati Cinci./N. Kentucky
4h 20m1 stop Atlanta Hartsfield-Jackson
$233Delta
Wed, Sep 23 - Thu, Sep 24

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United Airlines flights from Kentucky to St. Louis

Our best United Airlines deals on Kentucky to St. Louis flight tickets
United Airlines
Sep 5
TYS7:00 amKnoxville McGhee Tyson
6h 03m
1 stop
STL12:03 pmLambert-St Louis
Sep 11
STL10:53 amLambert-St Louis
5h 05m
1 stop
TYS4:58 pmKnoxville McGhee Tyson
$208
United Airlines
Sep 6
TYS7:00 amKnoxville McGhee Tyson
6h 02m
1 stop
STL12:02 pmLambert-St Louis
Sep 9
STL8:00 amLambert-St Louis
4h 18m
1 stop
TYS1:18 pmKnoxville McGhee Tyson
$216
United Airlines
Sep 4
TYS6:02 pmKnoxville McGhee Tyson
4h 58m
1 stop
STL10:00 pmLambert-St Louis
Sep 7
STL9:30 amLambert-St Louis
6h 28m
1 stop
TYS4:58 pmKnoxville McGhee Tyson
$231

American Airlines flights from Kentucky to St. Louis

Our best American Airlines deals on Kentucky to St. Louis flight tickets
American Airlines
Sep 3
TYS11:40 amKnoxville McGhee Tyson
5h 40m
1 stop
STL4:20 pmLambert-St Louis
Sep 10
STL5:18 pmLambert-St Louis
4h 25m
1 stop
TYS10:43 pmKnoxville McGhee Tyson
$221
American Airlines
Oct 14
TYS6:00 amKnoxville McGhee Tyson
7h 03m
1 stop
STL12:03 pmLambert-St Louis
Oct 17
STL6:32 amLambert-St Louis
6h 35m
1 stop
TYS2:07 pmKnoxville McGhee Tyson
$243
American Airlines
Sep 17
TYS8:00 amKnoxville McGhee Tyson
6h 16m
1 stop
STL1:16 pmLambert-St Louis
Sep 20
STL7:00 amLambert-St Louis
4h 53m
1 stop
TYS12:53 pmKnoxville McGhee Tyson
$257

momondo 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, momondo users made 832,500 searches. Data last updated August 17, 2026.
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

Cheapest round-trip
Quickest round-trip

NashvilleSt. Louis

BNA Nashville Intl - STL Lambert-St Louis

BNASTL

Nashville Intl

Sat 9/5

7:00 am-8:15 am

Nonstop1h 15m

Lambert-St Louis

Sun 9/6

2:45 pm-3:55 pm

Nonstop1h 10m

$109

CincinnatiSt. Louis

CVG Cincinnati Cinci./N. Kentucky - STL Lambert-St Louis

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 9/10

12:43 pm-1:10 pm

1 stop25h 27m

Lambert-St Louis

Mon 9/14

2:29 pm-11:38 am

1 stop20h 09m

$113

CincinnatiSt. Louis

CVG Cincinnati Cinci./N. Kentucky - STL Lambert-St Louis

CVGSTL

Cincinnati Cinci./N. Kentucky

Thu 9/10

12:43 pm-1:10 pm

1 stop25h 27m

Lambert-St Louis

Mon 9/14

2:29 pm-11:38 am

1 stop20h 09m

$114

NashvilleSt. Louis

BNA Nashville Intl - STL Lambert-St Louis

BNASTL

Nashville Intl

Mon 9/21

8:50 pm-10:10 pm

Nonstop1h 20m

Lambert-St Louis

Tue 9/22

2:45 pm-3:55 pm

Nonstop1h 10m

$117

NashvilleSt. Louis

BNA Nashville Intl - STL Lambert-St Louis

BNASTL

Nashville Intl

Sat 9/5

9:37 am-2:33 pm

1 stop4h 56m

Lambert-St Louis

Sun 9/6

6:00 am-10:02 am

1 stop4h 02m

$157

NashvilleSt. Louis

BNA Nashville Intl - STL Lambert-St Louis

BNASTL

Nashville Intl

Mon 11/16

9:30 am-1:21 pm

1 stop3h 51m

Lambert-St Louis

Thu 11/19

2:00 pm-6:03 pm

1 stop4h 03m

$167

NashvilleSt. Louis

BNA Nashville Intl - STL Lambert-St Louis

BNASTL

Nashville Intl

Mon 8/31

9:40 am-1:31 pm

1 stop3h 51m

Lambert-St Louis

Thu 9/3

2:10 pm-5:53 pm

1 stop3h 43m

$171

KnoxvilleSt. Louis

TYS Knoxville McGhee Tyson - STL Lambert-St Louis

TYSSTL

Knoxville McGhee Tyson

Sat 9/5

7:00 am-12:03 pm

1 stop6h 03m

Lambert-St Louis

Fri 9/11

10:53 am-4:58 pm

1 stop5h 05m

$208

KnoxvilleSt. Louis

TYS Knoxville McGhee Tyson - STL Lambert-St Louis

TYSSTL

Knoxville McGhee Tyson

Sun 9/6

7:00 am-12:02 pm

1 stop6h 02m

Lambert-St Louis

Wed 9/9

8:00 am-1:18 pm

1 stop4h 18m

$216

CincinnatiSt. Louis

CVG Cincinnati Cinci./N. Kentucky - STL Lambert-St Louis

CVGSTL

Cincinnati Cinci./N. Kentucky

Wed 9/23

6:28 pm-11:42 pm

1 stop6h 14m

Lambert-St Louis

Thu 9/24

6:00 am-11:20 am

1 stop4h 20m

$233

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Kentucky to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, December is the cheapest month to fly from Kentucky to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of November is another great option to travel to St. Louis, with average flight prices from Kentucky averaging around $228.

Cheap Kentucky to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Kentucky to St. Louis

Best Price Found

$51

Fastest flight time

1h 10m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Kentucky in the past 72 hours is $51. The best round-trip flight deal from Kentucky to St. Louis found on momondo in the last 72 hours is $109.
The fastest flight from Kentucky to St. Louis takes 1h 10m
Direct flights go from Kentucky to St. Louis every day.
There is 1 airport in St. Louis. From Kentucky there are direct flights to Lambert-St Louis (STL).
Search flight deals

Frequently asked questions about flying from Kentucky to St. Louis

  • When did momondo last update prices for flights from Kentucky to Lambert-St Louis Airport?

    Prices for flights from Kentucky to Lambert-St Louis Airport are updated daily.

  • How many operators does momondo search for flights from Kentucky to Lambert-St Louis Airport?

  • How old do you have to be to fly from Kentucky to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Kentucky to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Kentucky to St. Louis

Compare and see reviews for airlines that fly from Kentucky to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $228Free CancellationRating
7.1
11,943 reviews
Search American Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Maryland Heights
St. Peters
Hermann
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Kentucky to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Kentucky to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Kentucky to St. Louis with flexible booking policies on momondo?

All flight searches from Kentucky to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Kentucky to St. Louis?

Once you have performed a search for Kentucky to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Kentucky to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Kentucky to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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