Cheap Flights from ATL to STL: When to Fly from Atlanta to St. Louis

The cheapest times to fly from ATL to STL are

• January 22nd to February 4th
• May 14th to June 10th (except the week of May 21st)
• July 9th to July 22nd
• August 6th to January 7th (except the weeks of September 10th, November 19th, November 26th, and December 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ATL to STL is mid October. Prices can be as high as $623 for Sunday flights during late July, or as low as $171 for Tuesday flights around mid October.

When to Fly to St. Louis

Flying from Atlanta, GA (ATL) to St. Louis, MO (STL) will usually cost between $173 to $357 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid October with an average ticket price of $223. Due to high demand the most expensive time to fly is late July, with an average price of $357. Planning your trip to low-cost times can easily save you $133 on economy flights and even more on first-class flights. Generally, any price below $250 can be considered a good price for a round-trip ATL to STL flight.

See below for a graph of average weekly prices for the ATL to STL route. All prices are for round-trip tickets in USD.

Compared to other flights, the ATL to STL flight is much cheaper than the average and costs much less than the average flight leaving from Atlanta. The average price per mile (for a direct flight) is $0.32, which is in the normal range for a flight.

Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $67 (24%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $219. Return trip prices are from the STL to ATL flight, and often highlight the quality of our data in showing the same trend.

Nonstop Flights and Layovers

Travelers looking to fly from ATL to STL can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 51 minutes may be realistic.

Flight Questions Answered

Still have questions about flying from ATL to STL? We’ve got answers.

Which airlines fly this route?

You can find 9 major airlines flying this route most often: Air Choice One, Alaska, American, Cape Air, Delta, Frontier, Qantas, Southwest, United, and potentially more during busy seasons.

How far away is it from St Louis Lambert International Airport to Hartsfield-Jackson Atlanta International Airport?

The distance between the two airports is roughly 484 miles or 779 kilometers.

How long does it take to fly from ATL to STL?

The real-world flight time for a nonstop ATL to STL flight is about 1 hour 51 minutes.

How many flights go between Atlanta, GA and St. Louis, MO?

It depends on the day of the week and the date, but a typical day might have around 74 available flights from ATL to STL.

Airport Location Info

Late and Early Flight Data

Flights from ATL to STL tend to depart as late as the average flight. According to our recently updated data, 28% of flights departed 5 or more minutes late, and 6% of flights left 5 or more minutes early. On average you can expect to leave STL heading for ATL about 10 minutes late. This does significantly impact arrival time, as the average landing time in St. Louis, MO is about 3 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

• Southwest: 7 minutes late
• Delta: 11 minutes late
• Some airlines not reporting

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.