STL (St. Louis) to EWR (Newark) flights arrive on time 80% of the time. The most reliable airline on this route is Republic Airways at 85%. The average delay is 88 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated March 2026.STL → EWR
STL (St. Louis) to EWR (Newark)
STL → EWR on-time performance by month
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This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by air traffic and busy airspace.
Accurate?
Republic Airways is significantly more reliable on this route at 85% on time vs United Airlines at 68%.
Airline Comparison
Republic Airways leads at 85% on time; United Airlines trails at 68%.
Accurate?
Good to know
Departing from STL
81% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at EWR
77% on timeWhen flights into EWR are late, the average delay is 77 minutes. Build buffer if you have ground plans.
If connecting at EWR: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
EWR has a 3.1% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what Republic Airways owes you — refund rights, action plan, complaint email. Free.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.