Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Atlanta to St. Louis from $20

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 12/23. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Atlanta to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:55 am - 9:47 amATL-STL
1h 52mnonstop
Frontier Logo
10:42 am - 1:27 pmSTL-ATL
1h 45mnonstop
$92Frontier
Find Deal
Fri, Dec 5 - Sun, Dec 7
Frontier Logo
10:46 pm - 8:59 amATL-STL
11h 13m1 stop
Frontier Logo
12:04 pm - 2:49 pmSTL-ATL
1h 45mnonstop
$101Frontier
Find Deal
Thu, Dec 4 - Thu, Dec 11
Frontier Logo
10:46 pm - 8:59 amATL-STL
11h 13m1 stop
Frontier Logo
10:42 am - 1:27 pmSTL-ATL
1h 45mnonstop
$102Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
5:55 am - 10:33 pmATL-STL
17h 38m1 stop
Frontier Logo
10:57 am - 1:38 pmSTL-ATL
1h 41mnonstop
$103Frontier
Find Deal
Thu, Dec 25 - Sun, Dec 28
Frontier Logo
8:55 am - 9:40 amATL-STL
1h 45mnonstop
Frontier Logo
10:57 am - 1:38 pmSTL-ATL
1h 41mnonstop
$104Frontier
Find Deal
Tue, Dec 23 - Sun, Dec 28
Frontier Logo
4:48 pm - 10:33 pmATL-STL
6h 45m1 stop
Frontier Logo
3:30 pm - 9:26 pmSTL-ATL
4h 56m1 stop
$109Frontier
Find Deal
Tue, Dec 9 - Tue, Dec 16
Frontier Logo
12:50 pm - 10:33 pmATL-STL
10h 43m1 stop
Frontier Logo
7:43 pm - 6:13 amSTL-ATL
9h 30m1 stop
$110Frontier
Find Deal
Wed, Dec 3 - Sat, Dec 6
Frontier Logo
8:36 pm - 4:49 pmATL-STL
21h 13m1 stop
Frontier Logo
10:42 am - 1:27 pmSTL-ATL
1h 45mnonstop
$111Frontier
Find Deal
Tue, Mar 3 - Thu, Mar 5
Frontier Logo
7:59 pm - 12:12 pmATL-STL
17h 13m1 stop
Frontier Logo
10:42 am - 1:27 pmSTL-ATL
1h 45mnonstop
$114Frontier
Find Deal
Thu, Dec 11 - Sun, Dec 14
Multiple Airlines Logo
10:55 pm - 10:56 amATL-STL
13h 01m1 stop
Multiple Airlines Logo
10:42 am - 1:23 pmSTL-ATL
1h 41mnonstop
$116Multiple Airlines
Find Deal
Mon, Dec 22 - Thu, Dec 25

Frontier flights from Atlanta to St. Louis

Our best Frontier deals on Atlanta to St. Louis flight tickets
Frontier
Dec 5
ATL8:55 amAtlanta Hartsfield-Jackson
1h 52m
STL9:47 amLambert-St Louis
Dec 7
STL10:42 amLambert-St Louis
1h 45m
ATL1:27 pmAtlanta Hartsfield-Jackson
$92
Find similar
Frontier
Dec 4
ATL10:46 pmAtlanta Hartsfield-Jackson
11h 13m
1 stop
STL8:59 amLambert-St Louis
Dec 11
STL12:04 pmLambert-St Louis
1h 45m
ATL2:49 pmAtlanta Hartsfield-Jackson
$101
Find similar
Frontier
Feb 5
ATL10:46 pmAtlanta Hartsfield-Jackson
10h 04m
1 stop
STL7:50 amLambert-St Louis
Feb 8
STL10:42 amLambert-St Louis
1h 45m
ATL1:27 pmAtlanta Hartsfield-Jackson
$102
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 November 13, 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 12/5

8:55 am-9:47 am

Nonstop1h 52m

Lambert-St Louis

Sun 12/7

10:42 am-1:27 pm

Nonstop1h 45m

$92

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/4

10:46 pm-8:59 am

1 stop11h 13m

Lambert-St Louis

Thu 12/11

12:04 pm-2:49 pm

Nonstop1h 45m

$101

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/4

10:46 pm-8:59 am

1 stop11h 13m

Lambert-St Louis

Sun 12/7

10:42 am-1:27 pm

Nonstop1h 45m

$102

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/25

5:55 am-10:33 pm

1 stop17h 38m

Lambert-St Louis

Sun 12/28

10:57 am-1:38 pm

Nonstop1h 41m

$103

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 12/23

8:55 am-9:40 am

Nonstop1h 45m

Lambert-St Louis

Sun 12/28

10:57 am-1:38 pm

Nonstop1h 41m

$104

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 12/9

4:48 pm-10:33 pm

1 stop6h 45m

Lambert-St Louis

Tue 12/16

3:30 pm-9:26 pm

1 stop4h 56m

$109

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 12/3

12:50 pm-10:33 pm

1 stop10h 43m

Lambert-St Louis

Sat 12/6

7:43 pm-6:13 am

1 stop9h 30m

$110

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 3/3

8:36 pm-4:49 pm

1 stop21h 13m

Lambert-St Louis

Thu 3/5

10:42 am-1:27 pm

Nonstop1h 45m

$111

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/11

7:59 pm-12:12 pm

1 stop17h 13m

Lambert-St Louis

Sun 12/14

10:42 am-1:27 pm

Nonstop1h 45m

$114

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 12/22

10:55 pm-10:56 am

1 stop13h 01m

Lambert-St Louis

Thu 12/25

10:42 am-1:23 pm

Nonstop1h 41m

$116

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 August is another great option to travel to St. Louis, with average flight prices from Atlanta averaging around $198.

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 $268. 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 $368. 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 $270 when looking at flights departing at noon. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $316 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 $267 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 $212 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 November 2025, prices for Atlanta to St. Louis flights are approximately 12% 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

$123

Fastest flight time

1h 37m

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 $123. The best round-trip flight deal from Atlanta to St. Louis found on momondo in the last 72 hours is $180.
The fastest flight from Atlanta to St. Louis takes 1h 37m
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 $83Free CancellationRating
5.8
3,114 reviews
Search Frontier flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
DeltaPriceFrom $180Free CancellationRating
7.9
8,007 reviews
Search Delta flights
SouthwestPriceFrom $191Free CancellationRating
8.0
4,236 reviews
Search Southwest flights

  • Southwest Flights From Atlanta to St. Louis

    Across 21 Southwest flights from Atlanta to St. Louis this week, the average price was $314, with the best Southwest deals starting from $191 round-trip. 4,236 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 $180, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $302 round-trip. Delta operates 28 flights out of Atlanta into St. Louis in an average week, so prices vary by time and availability. 8,007 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
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 12/13
Sat 12/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States