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

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

77.4% of 1,075 official scheduled STL-to-EWR flights arrived on time; 13.3% arrived at least 30 minutes late and 4.6% 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
77.4%arrived on time
13.3%30+ min late
4.6%cancelled
1,075scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.4%all scheduled flights
120+ minutes late3.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+5.1 mincompleted flights

Which departure time was most reliable for STL to EWR?

Among qualifying STL-to-EWR departure window results, Early morning had the highest on-time rate: 87.6% of 379 flights. Evening was lowest at 64.2% across 296 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning37987.6%5.3%3.2%
Late morning29378.2%12.6%3.4%
Afternoon10775.7%16.8%2.8%
Evening29664.2%23.0%8.1%

Which weekday was most reliable for STL to EWR?

Among qualifying STL-to-EWR weekday results, Wednesday had the highest on-time rate: 82.2% of 157 flights. Sunday was lowest at 71.9% across 153 flights.

DayFlightsOn time30+ minCancelled
Monday15672.4%16.0%7.1%
Tuesday16077.5%11.9%4.4%
Wednesday15782.2%10.2%1.9%
Thursday15476.6%14.3%4.5%
Friday15682.1%12.8%3.2%
Saturday13979.1%13.7%5.0%
Sunday15371.9%14.4%5.9%

Which airline was most reliable for STL to EWR?

Among qualifying STL-to-EWR airline results, Republic Airways had the highest on-time rate: 79.0% of 948 flights. United Airlines was lowest at 65.4% across 127 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways94879.0%11.7%5.2%
United Airlines12765.4%25.2%0.0%

Which month was most reliable for STL to EWR?

Among qualifying STL-to-EWR month results, April 2026 had the highest on-time rate: 90.7% of 86 flights. October 2025 was lowest at 59.1% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259265.2%16.3%13.0%
August 20259377.4%17.2%2.2%
September 202510682.1%10.4%2.8%
October 20259359.1%33.3%2.2%
November 20258569.4%16.5%7.1%
December 20257771.4%18.2%2.6%
January 20268879.5%6.8%10.2%
February 20268380.7%4.8%8.4%
March 20268984.3%10.1%1.1%
April 20268690.7%7.0%1.2%
May 20269390.3%4.3%2.2%
June 20269077.8%14.4%2.2%

What drove STL to EWR delay minutes?

National airspace was the largest recorded STL-to-EWR delay category, accounting for 42.4% of 17,890 BTS-attributed delay minutes during July 2025–June 2026.

Airline12.8%
Late aircraft41.7%
National airspace42.4%
Weather3.1%
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.