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$21+ Cheap flights from Atlanta to St. Louis (ATL - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — STL
Oct 19 — Oct 261
Sun 10/19
Sun 10/26
1 adult, Economy
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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Lambert-St Louis are usually found in July or August, booked 88 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 September 19, 2025.

Round-trip from

$127
(Cheapflightsfares)

One-way from

$21
(Trip.com)

Popular in

December

Cheapest in

July

Average price

$275

Good round-trip deal

$176 or less

Good one-way deal

$104 or less
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. 14% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 19, 2025.

This Frontier deal was found by Cheapflights users on 9/17. 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.
Thu 10/22:16 pmATL - STL
Nonstop1h 48mFrontier
Sun 10/54:00 pmSTL - ATL
Nonstop1h 44mFrontier
Deal found 9/17$129
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 11/73:12 pmATL - STL
Nonstop1h 49mFrontier
Sun 11/95:12 pmSTL - ATL
1 stop5h 59mFrontier
Deal found 9/18$131
This Priceline deal was found by Cheapflights users on 9/17. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:16 pmATL - STL
Nonstop1h 48mFrontier
Mon 10/67:55 pmSTL - ATL
1 stop9h 07mFrontier
Deal found 9/17$132
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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.
Fri 10/179:50 amATL - STL
Nonstop1h 47mFrontier
Sun 10/1911:32 amSTL - ATL
Nonstop1h 40mFrontier
Deal found 9/17$133
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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.
Sun 11/99:25 amATL - STL
Nonstop1h 47mFrontier
Mon 11/102:12 pmSTL - ATL
1 stop8h 47mFrontier
Deal found 9/17$135
This Booking.com deal was found by Cheapflights users on 9/18. 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.
Wed 10/297:30 amATL - STL
1 stop26h 37mFrontier
Sun 11/211:27 amSTL - ATL
Nonstop1h 40mFrontier
Deal found 9/18$138
This Booking.com deal was found by Cheapflights users on 9/19. 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.
Tue 10/2812:15 pmATL - STL
1 stop21h 52mFrontier
Fri 10/314:52 pmSTL - ATL
Nonstop1h 43mFrontier
Deal found 9/19$139
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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.
Fri 10/109:50 amATL - STL
Nonstop1h 47mFrontier
Sun 10/1211:32 amSTL - ATL
Nonstop1h 40mFrontier
Deal found 9/16$141
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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.
Fri 10/1710:15 pmATL - STL
1 stop20h 47mFrontier
Mon 10/206:05 pmSTL - ATL
1 stop5h 36mFrontier
Deal found 9/17$142

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 September 19, 2025.
Use the filters below to find and compare flights from Atlanta to St. Louis that are best for you.

Fly from

Atlanta

Fly to

St. Louis

Route

Depart

Return

Price

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 10/10

9:50 am-10:37 am

Nonstop1h 47m

Lambert-St Louis

Sun 10/12

6:05 pm-12:41 am

1 stop5h 36m

$158

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 10/17

9:50 am-10:37 am

Nonstop1h 47m

Lambert-St Louis

Sun 10/19

10:17 am-5:03 pm

1 stop5h 46m

$163

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 10/3

7:23 pm-9:06 am

1 stop14h 43m

Lambert-St Louis

Sun 10/5

4:00 pm-6:44 pm

Nonstop1h 44m

$166

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sat 10/25

10:05 pm-9:22 am

1 stop12h 17m

Lambert-St Louis

Sun 10/26

7:52 pm-6:02 am

1 stop9h 10m

$175

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 10/17

8:45 pm-9:30 pm

Nonstop1h 45m

Lambert-St Louis

Mon 10/20

7:45 pm-10:15 pm

Nonstop1h 30m

$196

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Fri 11/14

10:55 pm-11:40 pm

Nonstop1h 45m

Lambert-St Louis

Mon 11/17

1:55 pm-4:30 pm

Nonstop1h 35m

$197

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sun 10/19

8:33 am-12:46 pm

1 stop5h 13m

Lambert-St Louis

Wed 10/22

7:52 pm-6:02 am

1 stop9h 10m

$200

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 10/16

12:00 pm-12:40 pm

Nonstop1h 40m

Lambert-St Louis

Wed 10/22

3:35 pm-6:10 pm

Nonstop1h 35m

$221

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 11/10

3:50 pm-4:35 pm

Nonstop1h 45m

Lambert-St Louis

Mon 11/10

6:45 pm-9:15 pm

Nonstop1h 30m

$222

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Wed 10/15

4:34 pm-9:07 am

2 stops17h 33m

Lambert-St Louis

Wed 10/22

7:52 pm-6:02 am

1 stop9h 10m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 results
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The best insider tips for Atlanta to St. Louis flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Atlanta to St. Louis trip
Airports
ATL

For a quicker security experience at ATL, try the South security area, often faster than the main one.

Read more about ATLby Chris Dong
STL

Use the MetroLink for a convenient and economical ride from STL to downtown St. Louis in about 40 minutes.

Read more about STLby Taryn White
Our travel experts
Chris Dong

Chris Dong

Expert on ATL

Chris Dong

Chris Dong

Chris is a consumer travel reporter covering aviation, trending travel news, hotels, and loyalty programs—all for leading global publications like Travel + Leisure, The Washington Post, AFAR, and more. In addition to writing, Chris is a video host for Travel + Leisure, giving consumers an inside look at the latest in air travel.

Read more
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more

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 September 12, 2025.

Booking 86 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, August is the cheapest month in which you can book a flight from Atlanta to St. Louis (average of $311). Flying from Atlanta to St. Louis in March is currently the most expensive (average of $356). 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 September 19, 2025.

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 afternoon tend to be the most expensive. A flight at noon could potentially save you up to 11% 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 September 14, 2025.

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

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 September 19, 2025.
Read through reviews of airlines operating flights from Atlanta to St. Louis, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,964 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,171 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 30 flights from Hartsfield-Jackson to St. Louis per day from 5 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 43 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 1h 47m. Fly via Frontier to get the fastest option. Atlanta and St. Louis are separated by a distance of 484 mi. Most flights are nonstop.

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

    Currently priced at $85, 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 American Airlines and Delta - these airlines can fly you to your destination from $133 and $181, respectively. Users have found that Frontier is 69% cheaper than the other options available to this destination.

  • 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 WestJet (85%), Delta (85%) or Aeromexico (82%) 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 $69. On average you can expect to pay $212. The most popular route, (Atlanta Hartsfield-Jackson - Lambert-St Louis), can usually be booked for $136.

  • 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, August is the cheapest month in which you can book a flight from Atlanta to St. Louis (average of $311). Flying from Atlanta to St. Louis in March is currently the most expensive (average of $356). 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Atlanta to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Atlanta to St. Louis

Discover the top 5 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$172FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$133Average$283FlexibilityNo cancel feeOn-time71%
DeltaCheapest$181Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$193Average$313FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$194Average$216FlexibilityNo cancel feeOn-timeN/A

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