$140 Cheap Delta flights Atlanta (ATL) to St. Louis (STL)

Use the “Price (lowest to highest)” filter on Expedia to look for cheap Delta Air Lines round-trip flights from $174 from ATL to STL. Affordable one-way fares from $140 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for return or one-way flights to St. Louis in January or February. You could find lower fares with Delta Air Lines during these off-peak months.

For cheap Delta Air Lines fares from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Lambert-St. Louis Intl. Airport (STL), start searching one to three months before your intended departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the cost. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Book a seat on one of Delta Air Lines’s 35 weekly direct flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Lambert-St. Louis Intl. Airport (STL). To see what’s available, enter your travel dates, origin and destination and hit search. Next, apply the “Nonstop” and “Airline” filters.

Leave Hartsfield-Jackson Atlanta Intl. Airport (ATL) for Lambert-St. Louis Intl. Airport (STL) on a nonstop Delta Air Lines flight, and you’ll be in the skies for around 1h 43m.

If you’re looking for flexibility, Thursday offers the most choice for Delta Air Lines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Lambert-St. Louis Intl. Airport (STL). You can pick from 5 different departures.

Jetting off from ATL at 8:35AM UTC-5, the first Delta Air Lines flight to STL arrives at 9:21AM UTC-6. Traveling earlier in the day means you’re less likely to encounter delays or cancellations.* Prefer to travel later? The last Delta Air Lines flight from ATL to STL departs at 10:54PM UTC-5 and touches down at 11:36PM UTC-6.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Lambert-St. Louis Intl. Airport (STL) is the primary St. Louis gateway for Delta Air Lines flights from Hartsfield-Jackson Atlanta Intl. Airport (ATL).

Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a top choice for many passengers heading from ATL to STL. Also, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be spent on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be on a Boeing 737-900 or a Boeing 737-800 when flying Delta Air Lines from Hartsfield-Jackson Atlanta Intl. Airport (ATL) to Lambert-St. Louis Intl. Airport (STL). However, keep in mind that a different aircraft may be assigned depending on operational requirements.

Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that. For further details about altering your reservation, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to change your plans without additional costs, apply the “No cancel fee” or “Changes included” filter when planning your next break.