St Louis (STL) to Atlanta (ATL) flights
Delta Air Lines, Southwest Airlines, Frontier Airlines fly nonstop from St. Louis Lambert International Airport to Hartsfield Jackson Atlanta International Airport, with about 73 flights a week in July 2026. The 484-mile flight takes about 1h 29m gate to gate.
- Distance
- 484 mi · 779 km
- Flight time
- 1h 29m
- Airlines
- 3
- Seats filled
- 74%
Airlines flying STL to ATL
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Delta Air Lines | 47 | Boeing 737-900ER, Boeing 737-800, Airbus A321 | 316,708 | 1h 29m |
| Southwest Airlines | 20 | Boeing 737-700 / MAX 7, Boeing 737 MAX 8, Boeing 737-800 | 105,168 | 1h 26m |
| Frontier Airlines | 7 | Airbus A321, Airbus A320neo, Airbus A320-100/200 | 26,995 | 1h 50m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
STL to ATL flight schedule
12 flight numbers flew this route in August 2026, 10 of them almost daily. The first usually leaves at 6:00am and the last at 6:50pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| DL 1524Delta Air Lines | 6:00am | 8:38am | 31 | 94% |
| DL 1536Delta Air Lines | 7:00am | 9:37am | 31 | 96% |
| DL 1571Delta Air Lines | 9:15am | 11:53am | 25 | 94% |
| WN 3798Southwest Airlines | 10:10am | 12:45pm | 28 | 85% |
| DL 1400Delta Air Lines | 11:00am | 1:37pm | 31 | 89% |
| DL 566Delta Air Lines | 12:52pm | 3:33pm | 31 | 87% |
| WN 1370Southwest Airlines | 3:05pm | 5:35pm | 8 | n/a |
| WN 3799Southwest Airlines | 3:15pm | 5:50pm | 16 | 60% |
| DL 2700Delta Air Lines | 3:39pm | 6:24pm | 31 | 88% |
| F9 4474Frontier Airlines | 4:57pm | 7:56pm | 25 | 60% |
| DL 1799Delta Air Lines | 5:23pm | 8:14pm | 29 | 90% |
| WN 3800Southwest Airlines | 6:50pm | 9:20pm | 24 | 50% |
Is STL to ATL on time?
From September 2025 to August 2026, 85% of 3,674 flights arrived within 15 minutes of schedule and 1.6% were cancelled. Flights leaving around 9am were the most punctual (95%), those around 4pm the least (69%). Most delay time was caused by late-arriving aircraft (43%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 2,349 | 90% | 9 min | 1.9% |
| Southwest Airlines | 1,091 | 79% | 12 min | 1.1% |
| Frontier Airlines | 234 | 61% | 39 min | 1.7% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 6am to 7am | 363 | 94% | |
| 7am to 8am | 436 | 94% | |
| 8am to 9am | 108 | 96% | |
| 9am to 10am | 270 | 95% | |
| 10am to 11am | 374 | 92% | |
| 11am to 12pm | 214 | 87% | |
| 12pm to 1pm | 113 | 86% | |
| 1pm to 2pm | 275 | 84% | |
| 3pm to 4pm | 299 | 82% | |
| 4pm to 5pm | 241 | 69% | |
| 5pm to 6pm | 338 | 79% | |
| 6pm to 7pm | 314 | 73% | |
| 7pm to 8pm | 167 | 67% | |
| 8pm to 9pm | 95 | 67% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 327 | 39,073 | |
| September 2025 | 317 | 38,921 | |
| October 2025 | 349 | 43,250 | |
| November 2025 | 273 | 33,105 | |
| December 2025 | 307 | 36,828 | |
| January 2026 | 260 | 28,972 | |
| February 2026 | 253 | 29,908 | |
| March 2026 | 275 | 35,785 | |
| April 2026 | 294 | 36,610 | |
| May 2026 | 325 | 41,073 | |
| June 2026 | 314 | 41,457 | |
| July 2026 | 325 | 43,949 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.