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Cheap flights from St. Louis to Kentucky from $78

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Kentucky departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Kentucky

Cheap round-trip flights

Frontier Logo
6:05 pm - 12:42 amSTL-CVG
5h 37m1 stop
Frontier Logo
11:00 am - 5:27 pmCVG-STL
7h 27m1 stop
$143Frontier
Find Deal
Mon, Oct 27 - Thu, Oct 30
Frontier Logo
10:49 am - 11:59 pmSTL-CVG
12h 10m1 stop
Frontier Logo
5:20 am - 1:02 pmCVG-STL
8h 42m1 stop
$146Frontier
Find Deal
Thu, Sep 18 - Mon, Sep 22
Southern / Mokulele Logo
9:50 am - 1:48 pmSTL-BNA
3h 58m1 stop
Southern / Mokulele Logo
2:35 pm - 6:36 pmBNA-STL
4h 01m1 stop
$157Southern / Mokulele
Find Deal
Thu, Oct 9 - Mon, Oct 13
Southwest Logo
8:25 am - 9:35 amSTL-BNA
1h 10mnonstop
Southwest Logo
3:00 pm - 4:20 pmBNA-STL
1h 20mnonstop
$171Southwest
Find Deal
Tue, Nov 11 - Tue, Nov 11
Southern / Mokulele Logo
9:50 am - 1:48 pmSTL-BNA
3h 58m1 stop
Southern / Mokulele Logo
2:35 pm - 6:36 pmBNA-STL
4h 01m1 stop
$173Southern / Mokulele
Find Deal
Fri, Sep 19 - Tue, Sep 23
Southwest Logo
4:25 pm - 7:50 pmSTL-BNA
3h 25m1 stop
Southwest Logo
8:50 pm - 10:10 pmBNA-STL
1h 20mnonstop
$181Southwest
Find Deal
Tue, Nov 11 - Tue, Nov 11
American Airlines Logo
5:11 pm - 1:30 pmSTL-SDF
19h 19m1 stop
American Airlines Logo
8:04 am - 4:41 pmSDF-STL
9h 37m1 stop
$183American Airlines
Find Deal
Tue, Dec 23 - Tue, Dec 30
Delta Logo
3:36 pm - 9:36 pmSTL-CVG
5h 00m1 stop
Delta Logo
7:05 am - 12:21 pmCVG-STL
6h 16m1 stop
$217Delta
Find Deal
Tue, Sep 30 - Wed, Oct 1
American Airlines Logo
6:05 am - 2:20 pmSTL-SDF
7h 15m1 stop
American Airlines Logo
7:09 pm - 11:07 pmSDF-STL
4h 58m1 stop
$223American Airlines
Find Deal
Thu, Sep 25 - Sat, Sep 27
Delta Logo
6:45 am - 1:32 pmSTL-CVG
5h 47m1 stop
Delta Logo
7:59 pm - 11:40 pmCVG-STL
4h 41m1 stop
$223Delta
Find Deal
Sat, Feb 28 - Wed, Mar 4

Southern / Mokulele flights from St. Louis to Kentucky

Our best Southern / Mokulele deals on St. Louis to Kentucky flight tickets
Southern / Mokulele
Oct 9
STL9:50 amLambert-St Louis
3h 58m
1 stop
BNA1:48 pmNashville Intl
Oct 13
BNA2:35 pmNashville Intl
4h 01m
1 stop
STL6:36 pmLambert-St Louis
$157
Find similar
Southern / Mokulele
Sep 19
STL9:50 amLambert-St Louis
3h 58m
1 stop
BNA1:48 pmNashville Intl
Sep 23
BNA2:35 pmNashville Intl
4h 01m
1 stop
STL6:36 pmLambert-St Louis
$173
Find similar
Southern / Mokulele
Sep 18
STL9:50 amLambert-St Louis
3h 58m
1 stop
BNA1:48 pmNashville Intl
Sep 22
BNA2:35 pmNashville Intl
4h 01m
1 stop
STL6:36 pmLambert-St Louis
$213
Find similar

Frontier flights from St. Louis to Kentucky

Our best Frontier deals on St. Louis to Kentucky flight tickets
Frontier
Oct 27
STL6:05 pmLambert-St Louis
5h 37m
1 stop
CVG12:42 amCincinnati Cinci./N. Kentucky
Oct 30
CVG11:00 amCincinnati Cinci./N. Kentucky
7h 27m
1 stop
STL5:27 pmLambert-St Louis
$143
Find similar
Frontier
Sep 18
STL10:49 amLambert-St Louis
12h 10m
1 stop
CVG11:59 pmCincinnati Cinci./N. Kentucky
Sep 22
CVG5:20 amCincinnati Cinci./N. Kentucky
8h 42m
1 stop
STL1:02 pmLambert-St Louis
$146
Find similar
Frontier
Sep 14
STL1:52 pmLambert-St Louis
21h 01m
1 stop
BNA10:53 amNashville Intl
Sep 17
BNA7:30 amNashville Intl
25h 36m
1 stop
STL9:06 amLambert-St Louis
$156
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Kentucky 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 September 4, 2025.
Use the filters below to find and compare flights from St. Louis to Kentucky that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCincinnati

STL - CVG

STLCVG

Lambert-St Louis

Mon 10/27

6:05 pm-12:42 am

1 stop5h 37m

Cincinnati Cinci./N. Kentucky

Thu 10/30

11:00 am-5:27 pm

1 stop7h 27m

$143

St. LouisCincinnati

STL - CVG

STLCVG

Lambert-St Louis

Thu 9/18

10:49 am-11:59 pm

1 stop12h 10m

Cincinnati Cinci./N. Kentucky

Mon 9/22

5:20 am-1:02 pm

1 stop8h 42m

$146

St. LouisNashville

STL - BNA

STLBNA

Lambert-St Louis

Thu 10/9

9:50 am-1:48 pm

1 stop3h 58m

Nashville Intl

Mon 10/13

2:35 pm-6:36 pm

1 stop4h 01m

$157

St. LouisNashville

STL - BNA

STLBNA

Lambert-St Louis

Tue 11/11

8:25 am-9:35 am

Nonstop1h 10m

Nashville Intl

Tue 11/11

3:00 pm-4:20 pm

Nonstop1h 20m

$171

St. LouisNashville

STL - BNA

STLBNA

Lambert-St Louis

Fri 9/19

9:50 am-1:48 pm

1 stop3h 58m

Nashville Intl

Tue 9/23

2:35 pm-6:36 pm

1 stop4h 01m

$173

St. LouisNashville

STL - BNA

STLBNA

Lambert-St Louis

Tue 11/11

4:25 pm-7:50 pm

1 stop3h 25m

Nashville Intl

Tue 11/11

8:50 pm-10:10 pm

Nonstop1h 20m

$181

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Tue 12/23

5:11 pm-1:30 pm

1 stop19h 19m

Louisville Intl

Tue 12/30

8:04 am-4:41 pm

1 stop9h 37m

$183

St. LouisCincinnati

STL - CVG

STLCVG

Lambert-St Louis

Tue 9/30

3:36 pm-9:36 pm

1 stop5h 00m

Cincinnati Cinci./N. Kentucky

Wed 10/1

7:05 am-12:21 pm

1 stop6h 16m

$217

St. LouisLouisville

STL - SDF

STLSDF

Lambert-St Louis

Thu 9/25

6:05 am-2:20 pm

1 stop7h 15m

Louisville Intl

Sat 9/27

7:09 pm-11:07 pm

1 stop4h 58m

$223

St. LouisCincinnati

STL - CVG

STLCVG

Lambert-St Louis

Sat 2/28

6:45 am-1:32 pm

1 stop5h 47m

Cincinnati Cinci./N. Kentucky

Wed 3/4

7:59 pm-11:40 pm

1 stop4h 41m

$223

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 Kentucky from

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

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 day to depart on your flight to Kentucky?

Our data shows that Thursday is the least expensive day to fly to Kentucky. Tickets to fly out on this day can be as low as $346. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $391. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kentucky.

What is the cheapest time of day to depart on your flight to Kentucky?

According to our data, the cheapest time of day to fly to Kentucky is in the morning. momondo users have found flights departing from St. Louis to Kentucky in the morning for as low as $350. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Kentucky is at noon when prices are around $438.

Cheap St. Louis to Kentucky flight deals and tips

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

Fastest flight time

1h 05m

Direct flights

Every day

Airports in Kentucky

1 airport
The fastest flight from St. Louis to Kentucky takes 1h 05m
Direct flights go from St. Louis to Kentucky every day.
There is 1 airport near Kentucky: Nashville Intl (BNA)
Search flight deals

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Kentucky.

  • What documentation or ID do you need to fly to Kentucky?

    The travel and health documents you'll need for your trip to Kentucky may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kentucky. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Kentucky

Compare and see reviews for airlines that fly from St. Louis to Kentucky with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $226Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
DeltaPriceFrom $228Free CancellationRating
7.9
7,977 reviews
Search Delta flights
American AirlinesPriceFrom $228Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kentucky from St. Louis.

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

Yes. All flights to Kentucky from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Kentucky.

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

Yes. momondo can track prices for St. Louis to Kentucky flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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