Route
STL → RDU
St. Louis Lambert International Airport Raleigh-Durham International Airport
How punctual is this route?
- On-time arrivals
- 78.7%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 60 min
- Flights arriving 15+ minutes late
- Flights tracked
- 664
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 68%
- Airline (crew, maintenance, cleaning) 24%
- Air traffic control & airport 4%
- Extreme weather 3%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 84.6% | 52 |
| October 2025 | 74.1% | 58 |
| November 2025 | 79.3% | 58 |
| December 2025 | 85.0% | 60 |
| January 2026 | 93.5% | 32 |
| February 2026 | 97.1% | 34 |
| March 2026 | 74.6% | 59 |
| April 2026 | 84.1% | 63 |
| May 2026 | 86.2% | 65 |
| June 2026 | 75.0% | 60 |
| July 2026 | 62.3% | 61 |
| August 2026 | 64.5% | 62 |
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 | 664 | 78.7% | 0.2% | 60 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN3032
8% late · 60 flights
-
WN3036
23% late · 60 flights
-
WN3810
48% late · 60 flights
-
WN3343
7% late · 58 flights
-
WN749
19% late · 57 flights
-
WN187
5% late · 39 flights
-
WN1179
36% late · 33 flights
-
WN4126
12% late · 33 flights
-
WN297
11% late · 27 flights
-
WN3915
0% late · 27 flights
-
WN878
30% late · 27 flights
-
WN1071
9% late · 22 flights
-
WN1650
27% late · 22 flights
-
WN3883
65% late · 20 flights
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