Route Reliability
Atlanta → St. Louis
ATL–STL · 484 miles · Hartsfield–Jackson Atlanta International Airport to St. Louis Lambert International Airport
- 82%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 1.6%
- Cancelled
- 3,718
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines84%2,380 flights
- 2.Southwest Airlines81%1,153 flights
- 3.Frontier Airlines70%185 flights
What the data says
Morning-you made the right choice.
ATL–STL flights departing between 6–9 AM arrived on time 91% of the time, versus 72% between 6–9 PM.
Sunday scaries are real for this one.
ATL–STL flights arrived on time 89% of the time on Wednesdays. On Sundays: 77%.
Delta Air Lines runs this route best.
Delta Air Lines arrived on time 84% of the time on this route; Frontier Airlines managed 70%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(556 flights)
- Tue86%(505 flights)
- Wed89%(509 flights)
- Thu82%(566 flights)
- Fri83%(548 flights)
- Sat83%(408 flights)
- Sun77%(558 flights)
- 6–9 AM91%(751 flights)
- 9 AM–12 PM88%(620 flights)
- 12–3 PM84%(593 flights)
- 3–6 PM79%(669 flights)
- 6–9 PM72%(635 flights)
- 9 PM–12 AM77%(382 flights)
Jun 75% → May 82% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 323 |
| July 2025 | 79% | 346 |
| August 2025 | 84% | 324 |
| September 2025 | 93% | 316 |
| October 2025 | 86% | 348 |
| November 2025 | 82% | 275 |
| December 2025 | 80% | 307 |
| January 2026 | 84% | 266 |
| February 2026 | 82% | 252 |
| March 2026 | 78% | 275 |
| April 2026 | 85% | 292 |
| May 2026 | 82% | 326 |
Keep nerding
Based on 3,718 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.