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St. Charles

$28+ Cheap flights from Atlanta (ATL) to St. Charles, MO

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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — STL
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to St. Charles are usually found in July or August, booked 87 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Atlanta to St. Charles

Cheapest flights from Atlanta to St. Charles
Explore the most affordable flight options available from Atlanta to St. Charles. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Frontier deal was found by Cheapflights users on 12/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:55 amATL - STL
Nonstop1h 45mFrontier
Fri 1/238:22 pmSTL - ATL
Nonstop1h 44mFrontier
Deal found 12/16$104
This Frontier deal was found by Cheapflights users on 12/17. 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 12/258:55 amATL - STL
Nonstop1h 45mFrontier
Tue 12/3010:48 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/17$130
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Mon 12/2210:50 pmATL - STL
1 stop24h 43mFrontier
Thu 12/2510:42 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/15$155
This CheapOair deal was found by Cheapflights users on 12/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:55 amATL - STL
Nonstop1h 45mFrontier
Fri 1/29:07 amSTL - ATL
1 stop21h 34mFrontier
Deal found 12/17$163
This Frontier deal was found by Cheapflights users on 12/17. 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.
Sun 12/288:55 amATL - STL
Nonstop1h 45mFrontier
Thu 1/110:42 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/17$164
This Super.com deal was found by Cheapflights users on 12/15. 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.
Tue 12/238:55 amATL - STL
Nonstop1h 45mFrontier
Thu 12/2510:42 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/15$166
This Super.com deal was found by Cheapflights users on 12/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:55 amATL - STL
Nonstop1h 45mFrontier
Sun 12/2810:57 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/17$167
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/245:55 amATL - STL
1 stop17h 38mFrontier
Thu 12/2510:42 amSTL - ATL
Nonstop1h 41mFrontier
Deal found 12/15$179

Find flight deals from Atlanta to St. Charles

Keep the following information in mind while searching for Atlanta to St. Charles flight deals. Data was last updated December 18, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$86
(Super.com)

One-way from

$28
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$357
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.
Search Deals
From Atlanta Hartsfield-Jackson to St. Charles
Search Deals
One-way flight from Atlanta Hartsfield-Jackson to St. Charles
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Atlanta to St. Charles 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 December 18, 2025.
Use the filters below to find and compare flights from Atlanta to St. Charles that are best for you.

Fly from

Atlanta

Fly to

St. Charles

Route

Depart

Return

Price

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sun 1/11

1:56 pm-2:48 pm

Nonstop1h 52m

Lambert-St Louis

Sat 1/17

8:32 pm-11:16 pm

Nonstop1h 44m

$107

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 1/19

6:00 am-6:51 am

Nonstop1h 51m

Lambert-St Louis

Thu 1/22

5:42 pm-7:14 am

1 stop12h 32m

$121

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 1/8

10:46 pm-7:50 am

1 stop10h 04m

Lambert-St Louis

Mon 1/12

8:50 am-9:41 pm

1 stop11h 51m

$162

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 12/30

8:55 am-9:40 am

Nonstop1h 45m

Lambert-St Louis

Fri 1/2

9:07 am-7:41 am

1 stop21h 34m

$163

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 12/25

8:55 am-9:40 am

Nonstop1h 45m

Lambert-St Louis

Sun 12/28

10:57 am-1:38 pm

Nonstop1h 41m

$167

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 1/15

10:17 am-11:05 am

Nonstop1h 48m

Lambert-St Louis

Thu 1/15

6:55 pm-9:48 pm

Nonstop1h 53m

$171

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Sat 1/17

10:15 am-11:02 am

Nonstop1h 47m

Lambert-St Louis

Mon 1/19

6:57 pm-9:50 pm

Nonstop1h 53m

$171

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Mon 1/19

5:08 pm-5:50 pm

Nonstop1h 42m

Lambert-St Louis

Thu 1/22

7:10 am-9:55 am

Nonstop1h 45m

$171

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Thu 1/15

6:10 am-9:35 am

1 stop4h 25m

Lambert-St Louis

Thu 1/15

2:20 pm-4:50 pm

Nonstop1h 30m

$181

AtlantaSt. Louis

ATL - STL

ATLSTL

Atlanta Hartsfield-Jackson

Tue 1/13

10:17 am-11:05 am

Nonstop1h 48m

$67

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 19 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to St. Charles 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. Charles

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

Use this chart to determine the optimal time to book a round-trip flight from Atlanta to St. Charles. Price data was last updated on December 12, 2025.

The best time to book flights from Atlanta to St. Charles is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, December is the cheapest month in which you can book a flight from Atlanta to St. Charles (average of $48). Flying from Atlanta to St. Charles in March is currently the most expensive (average of $244). 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 CH5?

Find hourly flight availability from Atlanta to St. Charles. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Atlanta to St. Charles at noon. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Atlanta to St. Charles. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Atlanta to St. Charles flight should consider departing on Saturday at noon 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.

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. 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. Charles. Reviews last updated December 18, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and American Airlines from Atlanta to St. Charles to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,009 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,081 reviews
Southwest
7.9
Good
4,250 reviews

Entertainment

7.5

Boarding

8.1

Overall

7.9

Food

7.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

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

  • What airport do you fly from for flights from Atlanta to St. Charles?

    Located just 8.2 mi from the city center, Atlanta Hartsfield-Jackson is the airport most travelers will use when flying to St. Charles from Atlanta. Booking flights from Hartsfield-Jackson (ATL) to St. Charles should be relatively easy as there are 8 daily outbound flights to St. Charles from 4 different airlines.

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

    Flights from Atlanta Hartsfield-Jackson to St. Charles have been viewed 43 times in the past calendar month.

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

    Frontier can get you from Atlanta to St. Charles in just under 1h 52m. Your travel time will be generally consistent. The distance from Atlanta to St. Charles is about 484 mi. All flights are typically nonstop.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $47. Users have also found prices from $98 and $137 on Southwest and American Airlines, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Atlanta to St. Charles consider choosing Frontier (85%), Air France (83%) or Delta (81%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Atlanta to St. Charles is $47. On average you can expect to pay $310. The most popular route, (Atlanta Hartsfield-Jackson - Lambert-St Louis), can usually be booked for $94.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Atlanta to St. Charles 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. Charles?

    Currently, December is the cheapest month in which you can book a flight from Atlanta to St. Charles (average of $48). Flying from Atlanta to St. Charles in March is currently the most expensive (average of $244). 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

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Alternative routes for Atlanta to St. Charles

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Atlanta to St. Charles

Discover the top 4 airlines that operate flights from Atlanta to St. Charles. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$161FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$133Average$486FlexibilityNo cancel feeOn-time71%
DeltaCheapest$177Average$288FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$188Average$302FlexibilityNo cancel feeOn-time63%

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