C$53 Cheap Flights from Atlanta (ATLA) to St Louis (STL)

Compare Atlanta to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Flight deals from Atlanta to St Louis

Looking for a cheap last-minute deal or the best return flight from Atlanta to St Louis Airport? If you want to travel next month, return fares start from C$105. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Atlanta to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Atlanta to St Louis flights are currently cheapest in June.

Which airlines fly from Atlanta to St Louis?

Atlanta to St Louis: Alternative routes

Compare routes from Atlanta to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Atlanta to St Louis: Flight information

The things to know before you go.
Cheapest flight foundC$53
Cheapest month to flyJune
Average flight time1 hr, 42 mins
Most popular airlineDelta
Average flights per week521

Finding cheap flights from Atlanta to St Louis: Frequently asked questions

The best price we found for a return flight from Atlanta to St Louis is C$84. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 42 minutes is the average flight time from Atlanta to St Louis.
Delta, WestJet and LATAM Airlines fly direct from Atlanta to St Louis.
As of June 2026, there are 563 flights per week flying from Atlanta to St Louis.
The cheapest month to fly from Atlanta to St Louis is usually August.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Atlanta to St Louis Airport on Saturday, August 15, 2026.
Yes – the average flight time is 1 hour and 42 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to St Louis is Frontier Airlines .

Travelling from Atlanta to Lambert-St. Louis International Airport (STL): what you need to know

  • Atlanta's main airport is Hartsfield-Jackson Atlanta International Airport (ATL). Check out your options for leaving from this terminal when searching for your flights from Atlanta to Lambert-St. Louis International Airport (STL).

  • The average time for a direct flight from Atlanta to Lambert-St. Louis International Airport is 1 hour 42 minutes.

  • Lambert-St. Louis International Airport is located in St Louis. The city operates in the UTC-5 timezone and is 1 hour behind Atlanta.

  • The busiest route is from Hartsfield-Jackson Atlanta International Airport (ATL) to Lambert-St. Louis International Airport (STL), with 82 direct weekly services. If you'd like to head off as soon as possible, the earliest flight from ATL to STL is the 06:50 Southwest Airlines option. If you prefer travelling later, the final departure is at 23:00 with Delta.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Be at the airport with enough time to catch your flight from Atlanta to STL.

  • Travelling during a peak month like July? Busy periods (like summer, Christmas/New Year and spring break) can add another hour at check-in and security. Be extra cautious and arrive up to four hours ahead of an international flight and two hours before a domestic departure.

Airports in Atlanta

Hartsfield-Jackson Atlanta International Airport (ATL)

  • Hartsfield-Jackson Atlanta International Airport (ATL) provides a hassle-free way to reach your destination. Nonstop flights from Atlanta to Lambert-St. Louis International Airport (STL) operate out of this terminal.

  • If you plan to leave from ATL, you can take a direct flight from Atlanta to Lambert-St. Louis International Airport with Southwest Airlines.

  • ATL is roughly 18 kilometres from central Atlanta. To help you work out how to get there, use Google Maps. This essential travel app will show you the quickest route and your public transport options.

  • Want a handy hotel close to Hartsfield-Jackson Atlanta International Airport? If you're boarding an early flight from Atlanta to Lambert-St. Louis International Airport, these stays will put you moments from your departure lounge:

About Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • Lambert-St. Louis International Airport to central St Louis is about 21 minutes by car. It's approximately 26 kilometres away. Find out what options are available, such as car rentals, cabs or ride-sharing.

  • If you're taking public transport, expect a journey time of about 36 minutes.

How to find the cheapest flights from Atlanta to Lambert-St. Louis International Airport (STL)

  • C$53 is the lowest price we've found for a one-way ticket from Atlanta to Lambert-St. Louis International Airport. Return flights start from C$84. Prices may vary depending on availability at the time of booking.

  • To snag flight tickets from Atlanta to STL, reserve your trip 8 months before your planned departure.

  • To snag the lowest price on your tickets from Atlanta to Lambert-St. Louis International Airport, schedule your trip for May (it has the cheapest flights). Have flexibility with your dates? Use the 'Whole month' tool to zero in on the most affordable day to fly.

  • Set up a Price Alert and track any changes on this route through email or push notifications. You'll know straight away when fares go down. It's all about timing when scoring flight tickets from Atlanta to STL.

  • Customize your trip with filters. Adjust the number of stops, duration, and arrival and departure times to find the right flight from Atlanta to Lambert-St. Louis International Airport. You can also sort the results to see the 'Fastest,' 'Best' or 'Cheapest' options first.

The best time to fly from Atlanta to Lambert-St. Louis International Airport (STL)

  • April is the quietest time of year to travel to St Louis. Alternatively, join the crowds and take off in July. This is the busiest month for flights from Atlanta to Lambert-St. Louis International Airport, but the best time to go is your call.

  • The warmest month in St Louis is July, with temperatures ranging between 17ºC and 33ºC. Book your flights from Atlanta to STL in this month if this is the type of weather you enjoy.

  • January sees average temperatures of between -8ºC and 7ºC. Search for cheap flights from Atlanta to Lambert-St. Louis International Airport sometime around then if you like cooler conditions.

More about St Louis

  • Start your St Louis trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from Atlanta to Lambert-St. Louis International Airport, explore our range of hotels including:

  • There are so many things to see and do in this city it can be hard to work out where to begin. The Gateway Arch, Forest Park and St. Louis Zoo are top attractions which should be on every St Louis itinerary.

Complete your St Louis trip with a car rental

  • Choose one of our car rentals in St Louis and explore the city at your own pace. Easily compare prices from trusted rental companies in one go after booking your hotel and cheap flights from Atlanta to Lambert-St. Louis International Airport.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.