HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Charles

$21+ 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 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
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Atlanta to St. Charles with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to St. Charles 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. Charles

Keep the following information in mind while searching for Atlanta to St. Charles flight deals. Data was 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
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. 14% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find 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 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. 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 September 19, 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

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
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 September 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, August is the cheapest month in which you can book a flight from Atlanta to St. Charles (average of $311). Flying from Atlanta to St. Charles 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 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 September 19, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Atlanta to St. Charles as you normally would.

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 afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Atlanta to St. Charles

Explore weekly flight availability from Atlanta to St. Charles. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 19, 2025.

The most flights from ATL to CH5 are scheduled on a Thursday (41 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (15 on average).

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 September 19, 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
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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

Comfort

8.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Food

7.0

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. 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 30 daily outbound flights to St. Charles from 5 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 47m. 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 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 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. Charles?

    The cheapest flight price from Atlanta to St. Charles 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. 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, August is the cheapest month in which you can book a flight from Atlanta to St. Charles (average of $311). Flying from Atlanta to St. Charles 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Atlanta to St. Charles

See prices for flight routes from nearby airports that may be better suited for you.
Atlanta to St. Louis flights
Atlanta to Kansas City flights
Atlanta to Springfield flights
Jacksonville to Kansas City flights
Jacksonville to St. Louis flights
Chattanooga to Kansas City flights
Savannah to St. Louis flights
Chattanooga to St. Louis flights
Asheville to Kansas City flights
Savannah to Kansas City flights
Augusta to St. Louis flights
Augusta to Kansas City flights
Asheville to St. Louis flights
Asheville to Springfield flights
Savannah to Springfield flights
Jacksonville to Springfield flights
Atlanta to Columbia flights
Tallahassee to Kansas City flights
Atlanta to Joplin flights
Chattanooga to Springfield flights
Tallahassee to St. Louis flights
Valdosta to Kansas City flights
Jacksonville to Joplin flights
Augusta to Columbia flights
Atlanta to Fort Leonard Wood flights
Tallahassee to Columbia flights
Jacksonville to Cape Girardeau flights
Tallahassee to Springfield flights

Top 5 airlines flying from Atlanta to St. Charles

Discover the top 5 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 September 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$172FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$133Average$476FlexibilityNo cancel feeOn-time71%
DeltaCheapest$181Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$193Average$313FlexibilityNo cancel feeOn-time63%
Southern / MokuleleCheapest$194Average$216FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.