STL (St. Louis) to RDU (Raleigh) flights arrive on time 85% of the time. The most reliable airline on this route is Southwest Airlines at 85%. The average delay is 54 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.STL → RDU
STL (St. Louis) to RDU (Raleigh)
STL → RDU on-time performance by month
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This route is on time most of the time. About 85% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
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Good to know
Departing from STL
81% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at RDU
80% on timeWhen flights into RDU are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at RDU: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.