Route
AUS → STL
Austin Bergstrom International Airport St. Louis Lambert International Airport
How punctual is this route?
- On-time arrivals
- 78.4%
- Less than 15 minutes late
- Cancelled
- 0.1%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 973
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 58%
- Airline (crew, maintenance, cleaning) 33%
- Air traffic control & airport 7%
- Extreme weather 1%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 79.5% | 73 |
| October 2025 | 83.1% | 83 |
| November 2025 | 80.0% | 85 |
| December 2025 | 81.3% | 91 |
| January 2026 | 88.7% | 63 |
| February 2026 | 83.1% | 59 |
| March 2026 | 70.9% | 86 |
| April 2026 | 85.4% | 89 |
| May 2026 | 73.9% | 93 |
| June 2026 | 60.0% | 86 |
| July 2026 | 71.9% | 89 |
| August 2026 | 89.3% | 76 |
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 |
|---|---|---|---|---|
| Southwest Airlines | 973 | 78.4% | 0.1% | 54 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN408
9% late · 96 flights
-
WN813
22% late · 60 flights
-
WN409
28% late · 58 flights
-
WN454
2% late · 58 flights
-
WN1193
44% late · 57 flights
-
WN407
6% late · 55 flights
-
WN461
18% late · 50 flights
-
WN346
2% late · 46 flights
-
WN4684
67% late · 36 flights
-
WN3907
27% late · 33 flights
-
WN654
15% late · 33 flights
-
WN872
37% late · 30 flights
-
WN1888
14% late · 28 flights
-
WN803
4% late · 27 flights
-
WN868
12% late · 26 flights
-
WN1772
17% late · 24 flights
-
WN805
9% late · 23 flights
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