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Cheap flights from Atlanta to St. Louis from $19

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Atlanta 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.
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Find the cheapest flights from Atlanta to St. Louis

Cheap round-trip flights

Frontier Logo
2:47 pm - 3:34 pmATL-STL
1h 47mnonstop
Frontier Logo
11:17 am - 1:57 pmSTL-ATL
1h 40mnonstop
$102Frontier
Find Deal
Fri, Nov 7 - Sun, Nov 9
Frontier Logo
7:23 pm - 9:06 amATL-STL
14h 43m1 stop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$103Frontier
Find Deal
Mon, Sep 22 - Thu, Sep 25
Frontier Logo
2:16 pm - 3:04 pmATL-STL
1h 48mnonstop
Frontier Logo
10:39 am - 9:14 pmSTL-ATL
9h 35m1 stop
$104Frontier
Find Deal
Thu, Sep 18 - Sun, Sep 21
Frontier Logo
7:34 am - 9:06 amATL-STL
26h 32m1 stop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$106Frontier
Find Deal
Sat, Sep 6 - Sun, Sep 7
Frontier Logo
7:23 pm - 9:06 amATL-STL
14h 43m1 stop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$107Frontier
Find Deal
Fri, Sep 5 - Sun, Sep 7
Frontier Logo
7:42 am - 9:06 amATL-STL
26h 24m1 stop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$109Frontier
Find Deal
Tue, Sep 16 - Thu, Sep 18
Frontier Logo
2:16 pm - 3:04 pmATL-STL
1h 48mnonstop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$110Frontier
Find Deal
Sun, Sep 28 - Mon, Sep 29
Frontier Logo
5:41 pm - 9:06 amATL-STL
16h 25m1 stop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$111Frontier
Find Deal
Sat, Sep 6 - Sun, Sep 7
Logo
3:36 pm - 9:40 amATL-STL
19h 04m1 stop
Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$166
Find Deal
Wed, Sep 24 - Thu, Sep 25
Southwest Logo
7:20 pm - 8:05 pmATL-STL
1h 45mnonstop
Southwest Logo
8:00 am - 10:35 amSTL-ATL
1h 35mnonstop
$167Southwest
Find Deal
Fri, Sep 26 - Sun, Sep 28

Frontier flights from Atlanta to St. Louis

Our best Frontier deals on Atlanta to St. Louis flight tickets
Frontier
Nov 7
ATL2:47 pmAtlanta Hartsfield-Jackson
1h 47m
STL3:34 pmLambert-St Louis
Nov 9
STL11:17 amLambert-St Louis
1h 40m
ATL1:57 pmAtlanta Hartsfield-Jackson
$102
Find similar
Frontier
Sep 22
ATL7:23 pmAtlanta Hartsfield-Jackson
14h 43m
1 stop
STL9:06 amLambert-St Louis
Sep 25
STL4:00 pmLambert-St Louis
1h 44m
ATL6:44 pmAtlanta Hartsfield-Jackson
$103
Find similar
Frontier
Sep 18
ATL2:16 pmAtlanta Hartsfield-Jackson
1h 48m
STL3:04 pmLambert-St Louis
Sep 21
STL10:39 amLambert-St Louis
9h 35m
1 stop
ATL9:14 pmAtlanta Hartsfield-Jackson
$104
Find similar

Spirit Airlines flights from Atlanta to St. Louis

Our best Spirit Airlines deals on Atlanta to St. Louis flight tickets
Spirit Airlines
Aug 30
ATL9:02 pmAtlanta Hartsfield-Jackson
13h 38m
1 stop
STL9:40 amLambert-St Louis
Sep 4
STL10:35 amLambert-St Louis
20h 07m
2 stops
ATL7:42 amAtlanta Hartsfield-Jackson
$278
Find similar
Spirit Airlines
Aug 30
ATL9:07 pmAtlanta Hartsfield-Jackson
17h 25m
2 stops
STL1:32 pmLambert-St Louis
Sep 4
STL10:35 amLambert-St Louis
20h 07m
2 stops
ATL7:42 amAtlanta Hartsfield-Jackson
$344
Find similar
Spirit Airlines
Aug 30
ATL9:07 pmAtlanta Hartsfield-Jackson
17h 25m
2 stops
STL1:32 pmLambert-St Louis
Sep 4
STL10:35 amLambert-St Louis
20h 07m
2 stops
ATL7:42 amAtlanta Hartsfield-Jackson
$350
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Atlanta 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 25, 2025.
Use the filters below to find and compare flights from Atlanta to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 11/7

2:47 pm-3:34 pm

Nonstop1h 47m

Lambert-St Louis

Sun 11/9

11:17 am-1:57 pm

Nonstop1h 40m

$102

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 9/22

7:23 pm-9:06 am

1 stop14h 43m

Lambert-St Louis

Thu 9/25

4:00 pm-6:44 pm

Nonstop1h 44m

$103

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 9/18

2:16 pm-3:04 pm

Nonstop1h 48m

Lambert-St Louis

Sun 9/21

10:39 am-9:14 pm

1 stop9h 35m

$104

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sat 9/6

7:34 am-9:06 am

1 stop26h 32m

Lambert-St Louis

Sun 9/7

4:00 pm-6:44 pm

Nonstop1h 44m

$106

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 9/5

7:23 pm-9:06 am

1 stop14h 43m

Lambert-St Louis

Sun 9/7

4:00 pm-6:44 pm

Nonstop1h 44m

$107

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 9/16

7:42 am-9:06 am

1 stop26h 24m

Lambert-St Louis

Thu 9/18

4:00 pm-6:44 pm

Nonstop1h 44m

$109

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sun 9/28

2:16 pm-3:04 pm

Nonstop1h 48m

Lambert-St Louis

Mon 9/29

4:00 pm-6:44 pm

Nonstop1h 44m

$110

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sat 9/6

5:41 pm-9:06 am

1 stop16h 25m

Lambert-St Louis

Sun 9/7

4:00 pm-6:44 pm

Nonstop1h 44m

$111

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 9/24

3:36 pm-9:40 am

1 stop19h 04m

Lambert-St Louis

Thu 9/25

4:00 pm-6:44 pm

Nonstop1h 44m

$166

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 9/26

7:20 pm-8:05 pm

Nonstop1h 45m

Lambert-St Louis

Sun 9/28

8:00 am-10:35 am

Nonstop1h 35m

$167

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 Atlanta 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, July is the cheapest month to fly from Atlanta to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $197. The month of June is another great option to travel to St. Louis, with average flight prices from Atlanta averaging around $226.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $290. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $367. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Atlanta at noon is the least expensive time of day to depart. momondo users have found prices as low as $299 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $331 per ticket.

What is the cheapest Atlanta Hartsfield-Jackson to Lambert-St Louis flight route?

Fly from Atlanta Hartsfield-Jackson to Lambert-St Louis for the best Atlanta Hartsfield-Jackson - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $283 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Atlanta for as low as $167 on momondo.

What cabin class options are available on Atlanta Hartsfield-Jackson to Lambert-St Louis flights?

There are 3 cabin classes available to choose from on Atlanta Hartsfield-Jackson to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Atlanta to St. Louis flight prices changed over time?

As of August 2025, prices for Atlanta to St. Louis flights are approximately 31% cheaper when compared to flights at the same time last year.

When to book flights from Atlanta to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Atlanta to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Atlanta to St. Louis (ATL to STL) flight deals and tips

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

Best Price Found

$106

Fastest flight time

1h 36m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Atlanta in the past 72 hours is $106. The best round-trip flight deal from Atlanta to St. Louis found on momondo in the last 72 hours is $170.
The fastest flight from Atlanta to St. Louis takes 1h 36m
Direct flights go from Atlanta to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • How far is Atlanta Hartsfield-Jackson to Lambert-St Louis by plane?

    Atlanta Hartsfield-Jackson and Lambert-St Louis are 466.6 mi apart from one another. Flights usually cover this in 1h 45m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Atlanta Hartsfield-Jackson Airport to Lambert-St Louis Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Atlanta Hartsfield-Jackson Airport 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.

  • What is the most popular plane model from Atlanta to St. Louis?

  • What is the most popular airline from Atlanta to St. Louis?

Best airlines flying from Atlanta to St. Louis

Compare and see reviews for airlines that fly from Atlanta to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $91Free CancellationRating
5.8
3,201 reviews
Search Frontier flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $183Free CancellationRating
7.9
7,981 reviews
Search Delta flights
Southern / MokulelePriceFrom $194Free CancellationRating
6.5
27 reviews
Search Southern / Mokulele flights
SouthwestPriceFrom $194Free CancellationRating
8.0
4,243 reviews
Search Southwest flights

  • Southwest Flights From Atlanta to St. Louis

    Across 13 Southwest flights from Atlanta to St. Louis this week, the average price was $313, with the best Southwest deals starting from $194 round-trip. 4,243 users have rated Southwest on momondo, with an average score of 8.0/10.

  • Delta Flights From Atlanta to St. Louis

    The best Delta deal for Atlanta to St. Louis flight tickets found on momondo in the last 72 hours was $183, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $311 round-trip. Delta operates 22 flights out of Atlanta into St. Louis in an average week, so prices vary by time and availability. 7,981 Delta reviews by users on momondo have scored the airline at 7.9/10.

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
Hermann
Maryland Heights
Florissant
O'Fallon
Fenton
Collinsville
Wentzville
Alton
St. Peters
Festus
Farmington
Glencoe
Clayton
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

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 St. Louis from Atlanta.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Atlanta with this policy.

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

Once all potential Atlanta to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to St. Louis from Atlanta. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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