BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
EWR→STL

Newark, NJ (EWR) to St. Louis, MO (STL) flight delay odds

80.2% of 1,074 official scheduled EWR-to-STL flights arrived on time; 10.2% arrived at least 30 minutes late and 5.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALHigher disruption
80.2%arrived on time
10.2%30+ min late
5.0%cancelled
1,074scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.6%all scheduled flights
120+ minutes late1.6%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-3.1 mincompleted flights

Which departure time was most reliable for EWR to STL?

Among qualifying EWR-to-STL departure window results, Early morning had the highest on-time rate: 87.2% of 133 flights. Night was lowest at 69.7% across 363 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning13387.2%4.5%3.8%
Late morning22886.8%7.0%1.8%
Afternoon33184.3%7.9%4.8%
Night36369.7%16.5%8.0%

Which weekday was most reliable for EWR to STL?

Among qualifying EWR-to-STL weekday results, Friday had the highest on-time rate: 85.8% of 155 flights. Saturday was lowest at 75.9% across 137 flights.

DayFlightsOn time30+ minCancelled
Monday15677.6%11.5%7.7%
Tuesday16182.0%10.6%3.7%
Wednesday15582.6%10.3%2.6%
Thursday15478.6%7.8%5.2%
Friday15585.8%7.7%2.6%
Saturday13775.9%12.4%5.1%
Sunday15678.2%11.5%8.3%

Which airline was most reliable for EWR to STL?

Among qualifying EWR-to-STL airline results, Republic Airways had the highest on-time rate: 81.4% of 946 flights. United Airlines was lowest at 71.1% across 128 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways94681.4%8.5%5.6%
United Airlines12871.1%23.4%0.8%

Which month was most reliable for EWR to STL?

Among qualifying EWR-to-STL month results, April 2026 had the highest on-time rate: 95.3% of 86 flights. December 2025 was lowest at 64.5% across 76 flights.

MonthFlightsOn time30+ minCancelled
July 20259269.6%9.8%15.2%
August 20259380.6%11.8%1.1%
September 202510684.9%8.5%2.8%
October 20259378.5%14.0%2.2%
November 20258581.2%8.2%8.2%
December 20257664.5%19.7%5.3%
January 20268876.1%9.1%11.4%
February 20268380.7%4.8%8.4%
March 20268983.1%12.4%2.2%
April 20268695.3%2.3%1.2%
May 20269389.2%3.2%2.2%
June 20269075.6%20.0%1.1%

What drove EWR to STL delay minutes?

Late aircraft was the largest recorded EWR-to-STL delay category, accounting for 42.9% of 10,902 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.5%
Late aircraft42.9%
National airspace20.3%
Weather9.3%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.