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Cheap flights from Atlanta to St. Louis (ATL - STL) - Compare and Save

ATL — STL
May 4 — May 111
Mon 5/4
Mon 5/11
1 adult, Economy
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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Lambert-St Louis are usually found in August or July, booked 85 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Atlanta to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Atlanta (ATL) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$87
(Kiwi.com)

One-way from

$28
(Frontier)

Popular in

March

Cheapest in

August

Average price

$255

Good round-trip deal

$208 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Atlanta Hartsfield-Jackson-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Atlanta Hartsfield-Jackson-Lambert-St Louis flights.
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From Atlanta Hartsfield-Jackson to Lambert-St Louis
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One-way flight from Atlanta Hartsfield-Jackson to Lambert-St Louis
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Highest demand for flights based on searches. 11% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in April 2026
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Price to beat on a round-trip flight from Atlanta Hartsfield-Jackson to Lambert-St Louis.
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Price to beat on a one-way flight from Atlanta Hartsfield-Jackson to Lambert-St Louis.
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Find flight deals from Atlanta to St. Louis

Cheapest flights from Atlanta to St. Louis
Explore the most affordable flight options available from Atlanta to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 4, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:43 pm
ATL
-
STL
Nonstop1h 50m
Frontier
Thu 5/286:33 pm
STL
-
ATL
Nonstop1h 50m
Frontier
Deal found 3/31$87
This Super.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
ATL
-
STL
Nonstop1h 50m
Frontier
Sat 4/258:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 3/30$88
This Super.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 am
ATL
-
STL
Nonstop1h 50m
Frontier
Sat 5/28:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 3/30$89
This Frontier deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/24:43 pm
ATL
-
STL
Nonstop1h 50m
Frontier
Wed 6/105:33 pm
STL
-
ATL
Nonstop1h 52m
Frontier
Deal found 3/30$90
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:00 am
ATL
-
STL
Nonstop1h 50m
Frontier
Fri 4/248:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 4/3$91
This Cheapflightsfares deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:05 am
ATL
-
STL
Nonstop1h 47m
Frontier
Sun 6/146:33 pm
STL
-
ATL
Nonstop1h 52m
Frontier
Deal found 4/2$92
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:05 am
ATL
-
STL
Nonstop1h 50m
Frontier
Wed 5/205:27 pm
STL
-
ATL
Nonstop1h 47m
Frontier
Deal found 3/31$96
This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
ATL
-
STL
Nonstop1h 50m
Frontier
Fri 4/178:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 4/1$97
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:00 am
ATL
-
STL
Nonstop1h 50m
Frontier
Sat 4/188:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 3/31$98
This Cheapflightsfares deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:43 pm
ATL
-
STL
Nonstop1h 47m
Frontier
Sun 6/146:33 pm
STL
-
ATL
Nonstop1h 52m
Frontier
Deal found 3/30$102
This Cheapflightsfares deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2312:00 pm
ATL
-
STL
1 stop12h 19m
Frontier
Sat 4/258:23 pm
STL
-
ATL
Nonstop1h 46m
Frontier
Deal found 4/1$103
This Booking.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:53 pm
ATL
-
STL
1 stop7h 28m
Frontier
Mon 5/185:27 pm
STL
-
ATL
Nonstop1h 47m
Frontier
Deal found 4/3$104

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 4, 2026.
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

Cheapest round-trip

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 5/5

6:20 am-12:50 pm

2 stops7h 30m

Lambert-St Louis

Wed 5/6

8:35 am-3:50 pm

1 stop6h 15m

$202

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 4/28

11:10 am-2:50 pm

1 stop4h 40m

Lambert-St Louis

Thu 4/30

10:15 am-2:50 pm

1 stop3h 35m

$203

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 5/5

3:37 pm-9:13 pm

1 stop6h 36m

Lambert-St Louis

Wed 5/6

7:45 am-1:35 pm

1 stop4h 50m

$267

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 7/23

10:45 am-3:50 pm

1 stop6h 05m

Lambert-St Louis

Sun 7/26

10:25 am-6:10 pm

1 stop6h 45m

$277

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 5/5

5:12 pm-11:57 pm

1 stop7h 45m

Lambert-St Louis

Sat 5/9

7:45 am-1:35 pm

1 stop4h 50m

$278

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 5/5

3:57 pm-10:30 pm

1 stop7h 33m

Lambert-St Louis

Sat 5/9

10:14 am-5:55 pm

1 stop6h 41m

$278

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 4/21

2:30 pm-3:15 pm

Nonstop1h 45m

Lambert-St Louis

Wed 4/22

8:25 am-3:40 pm

1 stop6h 15m

$279

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 4/29

7:35 pm-10:00 pm

1 stop3h 25m

Lambert-St Louis

Sun 5/3

10:15 am-12:50 pm

Nonstop1h 35m

$285
Quickest round-trip

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 4/17

8:37 pm-9:19 pm

Nonstop1h 42m

Lambert-St Louis

Tue 4/21

1:02 pm-3:35 pm

Nonstop1h 33m

$295

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 4/29

7:35 pm-10:00 pm

1 stop3h 25m

Lambert-St Louis

Sun 5/3

11:40 am-7:50 pm

2 stops7h 10m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Atlanta to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Atlanta to St. Louis in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Atlanta-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Atlanta-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Atlanta-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Atlanta-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Atlanta-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Atlanta to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Atlanta with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Atlanta to St. Louis

How far ahead should I book a flight from Atlanta to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Atlanta to St. Louis. Price data was last updated on April 2, 2026.

Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from Atlanta to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Atlanta to St. Louis?

Currently, February is the cheapest month in which you can book a flight from Atlanta to St. Louis (average of $33). Flying from Atlanta to St. Louis in September is currently the most expensive (average of $134). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ATL to STL?

Find hourly flight availability from Atlanta to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 4, 2026.

One of the essential ways to save on airfare from Atlanta to St. Louis is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 23% on airfare.

What is the cheapest day to fly from Atlanta to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Atlanta to St. Louis. Price data was last updated on April 4, 2026.

Travelers seeking maximum savings on their Atlanta to St. Louis flight should consider departing on Thursday mornings when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Atlanta to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 4, 2026.
Read through reviews of airlines operating flights from Atlanta to St. Louis, such as Southwest,Delta, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,343 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,343 reviews
Southwest
8.0
Very good
4,343 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,385 reviews
Southwest
8.0
Very good
4,343 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
3,001 reviews
Southwest
8.0
Very good
4,343 reviews

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Atlanta to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Atlanta to St. Louis?

    If you book a flight from Atlanta to St. Louis, you will be flying from Hartsfield-Jackson to Lambert-St Louis. Flights to Lambert-St Louis (STL) from Atlanta Hartsfield-Jackson (ATL) take 1h 36m for a nonstop flight. There are 29 flights from Hartsfield-Jackson to St. Louis per day from 3 airlines.

  • How popular is this Atlanta to St. Louis flight route?

    This flight path from Atlanta Hartsfield-Jackson to Lambert-St Louis was viewed by 47 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Atlanta to St. Louis?

    There are many flights that can get you from Atlanta to St. Louis in 6h 36m. Fly via Southwest or United Airlines to get the fastest option. Atlanta and St. Louis are separated by a distance of 484 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Atlanta to St. Louis round-trip?

    Currently priced at $56, Frontier will fly you from Atlanta to St. Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Southwest - these airlines can fly you to your destination from $153 and $187, respectively. Users have found that Frontier is 75% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Atlanta to St. Louis one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $38. However, be on the lookout for offers from American Airlines and Southwest, as they are both options that can get you from Atlanta to St. Louis for a low price.

  • What are the most reliable airlines from Atlanta to St. Louis?

    No one likes to see their flight delayed. When booking a flight from Atlanta to St. Louis consider choosing KLM (85%), Air France (81%) or LATAM Airlines (80%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Atlanta to St. Louis?

    The cheapest flight price from Atlanta to St. Louis is $88. On average you can expect to pay $376. The most popular route, (Atlanta Hartsfield-Jackson - Lambert-St Louis), can usually be booked for $115.

  • Can I find deals for flights from Atlanta to St. Louis that include hotel bookings?

    Yes. In addition to deals on Atlanta to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Atlanta to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Atlanta to St. Louis.

  • Can I find deals for business class flights from Atlanta to St. Louis?

    Yes. Cheapflights offers flight deals from Atlanta to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Atlanta to St. Louis?

    Currently, February is the cheapest month in which you can book a flight from Atlanta to St. Louis (average of $33). Flying from Atlanta to St. Louis in September is currently the most expensive (average of $134). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Atlanta to St. Louis

Discover the top 3 airlines that operate flights from Atlanta to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$56Average$153FlexibilityNo cancel feeOn-time62%
DeltaCheapest$153Average$273FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$187Average$301FlexibilityNo cancel feeOn-time63%

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