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Cheap flights from Atlanta to St. Louis from $35

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 9/28. 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 Atlanta to St. Louis

Cheap round-trip flights

Frontier Logo
9:50 am - 10:37 amATL-STL
1h 47mnonstop
Frontier Logo
6:05 pm - 3:45 pmSTL-ATL
20h 40m1 stop
$126Frontier
Find Deal
Fri, Oct 17 - Mon, Oct 20
Frontier Logo
9:25 am - 10:12 amATL-STL
1h 47mnonstop
Frontier Logo
8:40 pm - 6:02 amSTL-ATL
8h 22m1 stop
$127Frontier
Find Deal
Thu, Oct 30 - Sat, Nov 1
Frontier Logo
9:25 am - 10:12 amATL-STL
1h 47mnonstop
Frontier Logo
2:12 pm - 9:33 pmSTL-ATL
6h 21m1 stop
$128Frontier
Find Deal
Thu, Oct 30 - Sun, Nov 2
Frontier Logo
7:30 am - 9:07 amATL-STL
26h 37m1 stop
Frontier Logo
11:23 am - 2:03 pmSTL-ATL
1h 40mnonstop
$129Frontier
Find Deal
Tue, Nov 4 - Sun, Nov 9
Frontier Logo
9:50 am - 10:37 amATL-STL
1h 47mnonstop
Frontier Logo
6:05 pm - 12:41 amSTL-ATL
5h 36m1 stop
$130Frontier
Find Deal
Thu, Oct 9 - Fri, Oct 10
Frontier Logo
2:16 pm - 3:04 pmATL-STL
1h 48mnonstop
Frontier Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$132Frontier
Find Deal
Thu, Sep 25 - Sun, Sep 28
Frontier Logo
10:29 am - 9:07 amATL-STL
23h 38m1 stop
Frontier Logo
11:32 am - 2:12 pmSTL-ATL
1h 40mnonstop
$133Frontier
Find Deal
Wed, Oct 8 - Thu, Oct 9
Frontier Logo
2:16 pm - 3:04 pmATL-STL
1h 48mnonstop
Frontier Logo
2:38 pm - 6:07 amSTL-ATL
14h 29m1 stop
$134Frontier
Find Deal
Thu, Sep 25 - Fri, Sep 26
Logo
8:31 pm - 9:54 amATL-STL
38h 23m3 stops
Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$168
Find Deal
Fri, Sep 26 - Sun, Sep 28
Logo
9:59 am - 8:37 pmATL-STL
11h 38m1 stop
Logo
4:00 pm - 6:44 pmSTL-ATL
1h 44mnonstop
$170
Find Deal
Fri, Oct 3 - Sun, Oct 5

Frontier flights from Atlanta to St. Louis

Our best Frontier deals on Atlanta to St. Louis flight tickets
Frontier
Oct 17
ATL9:50 amAtlanta Hartsfield-Jackson
1h 47m
STL10:37 amLambert-St Louis
Oct 20
STL6:05 pmLambert-St Louis
20h 40m
1 stop
ATL3:45 pmAtlanta Hartsfield-Jackson
$126
Find similar
Frontier
Oct 30
ATL9:25 amAtlanta Hartsfield-Jackson
1h 47m
STL10:12 amLambert-St Louis
Nov 1
STL8:40 pmLambert-St Louis
8h 22m
1 stop
ATL6:02 amAtlanta Hartsfield-Jackson
$127
Find similar
Frontier
Oct 30
ATL9:25 amAtlanta Hartsfield-Jackson
1h 47m
STL10:12 amLambert-St Louis
Nov 2
STL2:12 pmLambert-St Louis
6h 21m
1 stop
ATL9:33 pmAtlanta Hartsfield-Jackson
$128
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 September 15, 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 10/17

9:50 am-10:37 am

Nonstop1h 47m

Lambert-St Louis

Mon 10/20

6:05 pm-3:45 pm

1 stop20h 40m

$126

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 10/30

9:25 am-10:12 am

Nonstop1h 47m

Lambert-St Louis

Sat 11/1

8:40 pm-6:02 am

1 stop8h 22m

$127

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 10/30

9:25 am-10:12 am

Nonstop1h 47m

Lambert-St Louis

Sun 11/2

2:12 pm-9:33 pm

1 stop6h 21m

$128

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 11/4

7:30 am-9:07 am

1 stop26h 37m

Lambert-St Louis

Sun 11/9

11:23 am-2:03 pm

Nonstop1h 40m

$129

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 10/9

9:50 am-10:37 am

Nonstop1h 47m

Lambert-St Louis

Fri 10/10

6:05 pm-12:41 am

1 stop5h 36m

$130

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 9/25

2:16 pm-3:04 pm

Nonstop1h 48m

Lambert-St Louis

Sun 9/28

4:00 pm-6:44 pm

Nonstop1h 44m

$132

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 10/8

10:29 am-9:07 am

1 stop23h 38m

Lambert-St Louis

Thu 10/9

11:32 am-2:12 pm

Nonstop1h 40m

$133

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 9/25

2:16 pm-3:04 pm

Nonstop1h 48m

Lambert-St Louis

Fri 9/26

2:38 pm-6:07 am

1 stop14h 29m

$134

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 9/26

8:31 pm-9:54 am

3 stops38h 23m

Lambert-St Louis

Sun 9/28

4:00 pm-6:44 pm

Nonstop1h 44m

$168

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 10/3

9:59 am-8:37 pm

1 stop11h 38m

Lambert-St Louis

Sun 10/5

4:00 pm-6:44 pm

Nonstop1h 44m

$170

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 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 $285. 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 $365. 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 $298 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 $329 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 $280 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 $178 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 September 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

$102

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 $102. The best round-trip flight deal from Atlanta to St. Louis found on momondo in the last 72 hours is $178.
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 47m, 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
3,172 reviews
Search Frontier flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $181Free CancellationRating
7.9
7,954 reviews
Search Delta flights
SouthwestPriceFrom $193Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
Southern / MokulelePriceFrom $194Free CancellationRating
6.3
25 reviews
Search Southern / Mokulele flights

  • Southwest Flights From Atlanta to St. Louis

    Across 16 Southwest flights from Atlanta to St. Louis this week, the average price was $314, with the best Southwest deals starting from $193 round-trip. 4,242 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 $181, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $312 round-trip. Delta operates 34 flights out of Atlanta into St. Louis in an average week, so prices vary by time and availability. 7,954 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
Fenton
Collinsville
Wentzville
Alton
St. Peters
Farmington
Festus
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.
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