Southwest Airlines is the most reliable airline on the RDU to STL route with a 83% on-time rate. Based on 2,089 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: RDU to STL
Raleigh to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines83%
RDU to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 83% | 0.5% | 53m | 2,089 |
Route Overview
83%
Overall On-Time
54m
Avg Delay
0.4%
Cancel Rate
2,089
Total Flights
Flying out of RDU? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.