$27+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — STL
Mar 7 — Mar 141
1 adult, Economy
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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 87 days in advance, depart on a Thursday or Friday and return on a Thursday
Cheap flight deals from Atlanta to St. Charles
Cheapest
Best
Last-minute
One-way
Cheapest flights from Atlanta to St. CharlesExplore 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 February 5, 2026.
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 February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sat 2/218:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/2![Frontier logo]()
$57
This Frontier deal was found by Cheapflights users on 2/4. 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.
Wed 2/256:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sat 2/288:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 2/116:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/138:20 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 2/168:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Wed 3/48:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/610:58 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 3/92:09 pm
STL
- ATL
Nonstop1h 44m
Frontier
Deal found 2/1![Frontier logo]()
$67
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 3/28:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Tue 3/249:41 am
ATL
- STL
Nonstop1h 51m
Frontier
Sun 3/2911:21 am
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 2/4. 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.
Fri 2/136:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/208:20 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/278:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$80
Best flights from Atlanta to St. CharlesDiscover carefully curated flight deals from Atlanta to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 5, 2026.
Discover carefully curated flight deals from Atlanta to St. Charles that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 5, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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 2/186:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sat 2/218:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$58
This Super.com deal was found by Cheapflights users on 2/4. 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.
Fri 2/136:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/208:20 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$73
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/110:22 am
ATL
- STL
Nonstop1h 47m
Delta
Wed 4/16:59 pm
STL
- ATL
Nonstop1h 45m
Delta
Deal found 2/2![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 2/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:50 am
ATL
- STL
1 stop5h 40m
Southwest
Wed 4/13:10 pm
STL
- ATL
Nonstop1h 30m
Southwest
Deal found 2/2![Southwest logo]()
$187
This Super.com deal was found by Cheapflights users on 2/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
ATL
- STL
Nonstop1h 50m
Frontier
Sat 5/28:13 pm
STL
- ATL
Nonstop1h 46m
Frontier
Deal found 2/2![Frontier logo]()
$87
This Cheapflightsfares deal was found by Cheapflights users on 2/2. 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.
Thu 4/166:00 am
ATL
- STL
1 stop18h 19m
Frontier
Sun 4/1911:21 am
STL
- ATL
Nonstop1h 46m
Frontier
Deal found 2/2![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 2/4. 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.
Wed 2/256:00 am
ATL
- STL
1 stop10h 53m
Frontier
Sat 2/288:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$128
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/811:15 pm
ATL
- STL
Nonstop1h 43m
Delta
Tue 3/107:03 am
STL
- ATL
Nonstop1h 37m
Delta
Deal found 2/4![Delta logo]()
$197
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/67:59 pm
ATL
- STL
Nonstop1h 42m
Delta
Sun 3/86:00 am
STL
- ATL
Nonstop1h 41m
Delta
Deal found 2/2![Delta logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sun 3/13:49 pm
STL
- ATL
2 stops20h 55m
Frontier
Deal found 2/4![Frontier logo]()
$153
Last-minute flights from Atlanta to St. CharlesDiscover last-minute flight deals from Atlanta to St. Charles. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from Atlanta to St. Charles. Data last updated February 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 2/116:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/138:20 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/136:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 2/168:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$63
This Super.com deal was found by Cheapflights users on 2/4. 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.
Fri 2/136:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/208:20 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/4![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/146:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sat 2/218:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/2![Frontier logo]()
$57
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Sat 2/288:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Wed 3/48:17 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$66
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 3/28:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$69
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Fri 2/278:22 pm
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/610:58 am
ATL
- STL
Nonstop1h 51m
Frontier
Mon 3/92:09 pm
STL
- ATL
Nonstop1h 44m
Frontier
Deal found 2/1![Frontier logo]()
$67
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Tue 3/249:41 am
ATL
- STL
Nonstop1h 51m
Frontier
Sun 3/2911:21 am
STL
- ATL
Nonstop1h 40m
Frontier
Deal found 2/3![Frontier logo]()
$72
One-way flights from Atlanta to St. CharlesSearch for one-way flight options from Atlanta to St. Charles. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
Search for one-way flight options from Atlanta to St. Charles. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 3/610:58 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$27
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Sat 2/216:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$28
This Priceline deal was found by Cheapflights users on 2/4. 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.
Wed 3/119:46 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$29
This Kiwi.com deal was found by Cheapflights users on 2/1. 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
Deal found 2/1![Frontier logo]()
$32
This Frontier deal was found by Cheapflights users on 2/4. 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.
Wed 4/226:00 am
ATL
- STL
Nonstop1h 50m
Frontier
Deal found 2/4![Frontier logo]()
$33
This Priceline deal was found by Cheapflights users on 2/4. 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 3/269:40 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$34
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 2/276:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$39
This Frontier deal was found by Cheapflights users on 2/4. 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 2/206:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$40
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Sun 4/129:40 am
ATL
- STL
Nonstop1h 50m
Frontier
Deal found 2/3![Frontier logo]()
$43
This Mytrip deal was found by Cheapflights users on 2/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/29:40 am
ATL
- STL
Nonstop1h 50m
Frontier
Deal found 2/4![Frontier logo]()
$44
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 2/166:00 am
ATL
- STL
Nonstop1h 51m
Frontier
Deal found 2/4![Frontier logo]()
$46
This Kiwi.com deal was found by Cheapflights users on 2/4. 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 3/109:20 pm
ATL
- STL
1 stop13h 29m
Frontier
Deal found 2/4![Frontier logo]()
$60
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 February 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $57 (Kiwi.com) |
One-way from | $27 (Kiwi.com) |
Popular in | March |
Cheapest in | July |
Average price | $285 |
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 February 5, 2026.
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
Wed 2/18
6:00 am-6:51 am
Nonstop1h 51m
Lambert-St Louis
Sat 2/21
8:17 pm-10:57 pm
Nonstop1h 40m
$58
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Fri 2/13
6:00 am-6:51 am
Nonstop1h 51m
Lambert-St Louis
Fri 2/20
8:20 pm-11:00 pm
Nonstop1h 40m
$73
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Wed 4/29
6:00 am-6:50 am
Nonstop1h 50m
Lambert-St Louis
Sat 5/2
8:13 pm-10:59 pm
Nonstop1h 46m
$87
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Thu 4/16
6:00 am-11:19 pm
1 stop18h 19m
Lambert-St Louis
Sun 4/19
11:21 am-2:07 pm
Nonstop1h 46m
$123
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Wed 2/25
6:00 am-3:53 pm
1 stop10h 53m
Lambert-St Louis
Sat 2/28
8:17 pm-10:57 pm
Nonstop1h 40m
$128
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Fri 2/27
6:00 am-6:51 am
Nonstop1h 51m
Lambert-St Louis
Sun 3/1
3:49 pm-1:44 pm
2 stops20h 55m
$153
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Wed 4/1
10:22 am-11:09 am
Nonstop1h 47m
Lambert-St Louis
Wed 4/1
6:59 pm-9:44 pm
Nonstop1h 45m
$177
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Wed 4/1
6:50 am-11:30 am
1 stop5h 40m
Lambert-St Louis
Wed 4/1
3:10 pm-5:40 pm
Nonstop1h 30m
$187
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Sun 3/8
11:15 pm-11:58 pm
Nonstop1h 43m
Lambert-St Louis
Tue 3/10
7:03 am-9:40 am
Nonstop1h 37m
$197
AtlantaSt. Louis
ATL - STL
ATLSTL
Atlanta Hartsfield-Jackson
Fri 3/6
7:59 pm-8:41 pm
Nonstop1h 42m
Lambert-St Louis
Sun 3/8
6:00 am-8:41 am
Nonstop1h 41m
$197
Showing 1-10 of 21 results
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.
ATL-STL
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
ATL-CH5
ATL-STL
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 January 30, 2026.
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 $46). Flying from Atlanta to St. Charles in April is currently the most expensive (average of $215). 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 February 5, 2026.
It’s typically best to fly out from Atlanta to St. Charles at noon. Doing so could potentially save you 18% on the flight price compared to flying in the evening, 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 January 31, 2026.
Travelers seeking maximum savings on their Atlanta to St. Charles flight should consider departing on Tuesday 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.
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 February 5, 2026.
The most flights from ATL to CH5 are scheduled on a Monday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 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 February 5, 2026.
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.
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
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Atlanta and St. Charles flights
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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 February 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$58 | Average$151 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$165 | Average$276 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$188 | Average$297 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$476 | FlexibilityNo cancel fee | On-time71% |