$27 Find Cheap Flights from Atlanta to St. Charles

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Atlanta to St. Charles departing on 7/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$74
Typical prices: $339-$181
Frontier
Sat 5/30Mon 6/1
ATL - STL • Non-stop
Cheapest one-way
$27
Typical prices: $106-$235
Frontier
Thu 7/30
ATL - STL • Non-stop
Arrival airport
You can't fly directly to St. Charles. It is served by St. Louis (STL), located 7.2 miles from St. Charles.
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Atlanta to St. Charles (ATL-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Atlanta to St. Charles that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Atlanta to St. Charles

Sat, May 30 - Mon, Jun 1
Frontier Logo
8:05 am - 8:55 am
ATL
-
STL
1h 50mnonstop
Frontier Logo
5:27 pm - 8:14 pm
STL
-
ATL
1h 47mnonstop
$74Frontier
Sat, May 30 - Sat, Jun 13
Frontier Logo
8:05 am - 8:55 am
ATL
-
STL
1h 50mnonstop
Frontier Logo
5:06 pm - 8:07 pm
STL
-
ATL
2h 01mnonstop
$82Frontier
Sat, May 30 - Thu, Jun 11
Frontier Logo
8:05 am - 8:55 am
ATL
-
STL
1h 50mnonstop
Frontier Logo
6:31 pm - 9:45 pm
STL
-
ATL
2h 14mnonstop
$83Frontier
Sun, Jun 21 - Sun, Jun 28
Frontier Logo
4:43 pm - 5:30 pm
ATL
-
STL
1h 47mnonstop
Frontier Logo
6:31 pm - 9:45 pm
STL
-
ATL
2h 14mnonstop
$84Frontier
Fri, Jun 12 - Sun, Jun 14
Frontier Logo
8:05 am - 8:52 am
ATL
-
STL
1h 47mnonstop
Frontier Logo
6:31 pm - 9:45 pm
STL
-
ATL
2h 14mnonstop
$91Frontier
Wed, Jun 10 - Sun, Jun 14
Frontier Logo
8:00 am - 8:47 am
ATL
-
STL
1h 47mnonstop
Frontier Logo
6:31 pm - 9:45 pm
STL
-
ATL
2h 14mnonstop
$92Frontier
Thu, Jul 16 - Sun, Jul 19
Frontier Logo
4:43 pm - 5:37 pm
ATL
-
STL
1h 54mnonstop
Frontier Logo
6:33 pm - 9:36 pm
STL
-
ATL
2h 03mnonstop
$98Frontier
Thu, Jul 16 - Sun, Jul 19
Frontier Logo
4:43 pm - 5:37 pm
ATL
-
STL
1h 54mnonstop
Frontier Logo
6:33 pm - 9:36 pm
STL
-
ATL
2h 03mnonstop
$99Frontier
Sun, Jun 7 - Sun, Jun 14
Frontier Logo
4:43 pm - 5:33 pm
ATL
-
STL
1h 50mnonstop
Frontier Logo
6:31 pm - 9:45 pm
STL
-
ATL
2h 14mnonstop
$109Frontier
Thu, Jul 16 - Sun, Jul 19
Frontier Logo
4:43 pm - 5:37 pm
ATL
-
STL
1h 54mnonstop
Frontier Logo
6:33 pm - 9:36 pm
STL
-
ATL
2h 03mnonstop
$110Frontier
Useful Info

Good to know

Low seasonMarch
Cheapest flight$27
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly with an average 17% increase in price.
Flight from Atlanta to St. Louis

When to book flights from Atlanta to St. Charles

Are your dates flexible? Find out the best times to travel from Atlanta to St. Charles based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Atlanta to St. Charles

  • Which airports will I be using when flying from Atlanta to St. Charles?

    When flying out of Atlanta you’ll be using Atlanta Hartsfield-Jackson. St. Charles does not have its own airport so you’ll be flying into nearby Lambert-St Louis airport, which is 7.2 mi away.

  • How long does a flight from Atlanta to St. Charles take?

    Direct flights cover the 484 miles separating Atlanta and St. Charles in about 1h 38m.

  • How many flights are there between Atlanta and St. Charles?

    54 direct flights run between Atlanta and St. Charles on a daily basis. On average, there are about 381 departures each week.

  • What’s the cheapest day of the week to fly between Atlanta and St. Charles?

    Consider leaving on a Sunday and avoid Saturdays if you are looking for the best rates. For your return to Atlanta, you’ll find the best rates on Wednesdays and the most expensive ones on Tuesdays.

  • How does KAYAK find such low prices on flights from Atlanta to St. Charles?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Atlanta to St. Charles.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Atlanta to St. Charles?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Charles from Atlanta is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Atlanta to St. Charles?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Charles with an airline and back to Atlanta with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Atlanta to St. Charles?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Charles from Atlanta up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Atlanta to St. Charles?

    In the last 72 hours, the cheapest one-way ticket between Atlanta and St. Charles found on KAYAK was with Frontier for $38. Frontier offered a round-trip connection from $57 and Delta from $154.

Top tips for finding cheap flights from Atlanta to St. Charles

  • There is no airport in St. Charles. Instead, you’ll be flying into St. Louis Lambert Airport when flying between Atlanta and St. Charles.
  • The cheapest flight from Atlanta to St. Charles was found 46 days before departure, on average.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be April, May and June. The cheapest month to fly is August.

Reviews of the top 3 airlines serving Atlanta to St. Charles

 
Need help choosing which airline to fly with from Atlanta to St. Charles? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4301 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

I'm glad it wasn't only 75% full because I could get a good seat

8.0 ExcellentBobby, May 2026
BNA - GSP
Read more Southwest reviews

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

Subpar. The seating on the plane is almost unbearable. We are literally touching and/or sitting on each other which is totally unacceptable and shameful. Pilots and crew was very accommodating and friendly.

During the flight, the only refreshments provided were crackers and soft drinks; no substantial food was offered despite the international route. Furthermore, our initial flight was delayed, causing us to miss the connecting flight in Atlanta. The airline did not hold the connection, and we were informed that the next available flight is not for another 24 hours. While I am aware of alternative options via JetBlue, they operate out of JFK, which is not a viable solution for us as a resident of New Jersey.

Mechanical Delay of over an hour with multiple gate changes. Entertainment system down for rejuvenation.

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

two hour delay and the Delta representative on the PA system was unable to understand

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

Everything you need to know for your flight from Atlanta to St. Charles

Complete your trip to St. Charles with a hotel stay or car rental