Route
STL → ATL
St. Louis Lambert International Airport Hartsfield Jackson Atlanta International Airport
How punctual is this route?
- On-time arrivals
- 84.6%
- Less than 15 minutes late
- Cancelled
- 1.6%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 3,673
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 44%
- Airline (crew, maintenance, cleaning) 34%
- Air traffic control & airport 18%
- Extreme weather 5%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 95.0% | 317 |
| October 2025 | 90.2% | 348 |
| November 2025 | 84.2% | 284 |
| December 2025 | 80.7% | 311 |
| January 2026 | 88.1% | 279 |
| February 2026 | 88.9% | 254 |
| March 2026 | 78.5% | 283 |
| April 2026 | 86.0% | 299 |
| May 2026 | 81.5% | 330 |
| June 2026 | 81.8% | 318 |
| July 2026 | 76.6% | 330 |
| August 2026 | 84.2% | 320 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Delta Air Lines | 2,348 | 89.5% | 1.9% | 82 min |
| Southwest Airlines | 1,091 | 79.2% | 1.1% | 59 min |
| Frontier Airlines | 234 | 60.7% | 1.7% | 99 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
DL1524
6% late · 365 flights
-
DL1571
6% late · 311 flights
-
DL1536
4% late · 267 flights
-
DL1400
11% late · 239 flights
-
DL1393
16% late · 230 flights
-
DL566
13% late · 223 flights
-
F94474
40% late · 209 flights
-
DL1485
16% late · 182 flights
-
DL2700
12% late · 155 flights
-
DL3156
21% late · 110 flights
-
DL1703
10% late · 109 flights
-
DL543
19% late · 84 flights
-
WN4427
5% late · 58 flights
-
WN2346
17% late · 57 flights
-
WN3882
57% late · 52 flights
-
WN1837
38% late · 50 flights
-
WN1588
5% late · 47 flights
-
WN378
12% late · 42 flights
-
WN999
5% late · 42 flights
-
WN2415
22% late · 41 flights
-
WN1936
36% late · 40 flights
-
WN3883
29% late · 35 flights
-
WN1941
6% late · 33 flights
-
WN4535
41% late · 33 flights
In the news
More headlines →-
City Council backs $55 million in new Hartsfield-Jackson funding as construction projects multiply
The Business Journals ATL
-
Over 400 flights cancelled due to severe weather at Hartsfield-Jackson Atlanta International Airport, Georgia
The Watchers - Watching the world evolve and transform ATL
-
Hartsfield-Jackson Atlanta International Airport
The Aviation Hub ATL
Headlines found by Google News; stories open on the publisher's site.
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