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

St. Louis, MO (STL) to Raleigh/Durham, NC (RDU) flight delay odds

82.4% of 652 official scheduled STL-to-RDU flights arrived on time; 11.7% arrived at least 30 minutes late and 0.2% 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 SIGNALLower disruption
82.4%arrived on time
11.7%30+ min late
0.2%cancelled
652scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late1.5%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+4.7 mincompleted flights

Which departure time was most reliable for STL to RDU?

Among qualifying STL-to-RDU departure window results, Early morning had the highest on-time rate: 94.1% of 202 flights. Evening was lowest at 72.1% across 290 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning20294.1%2.5%0.5%
Late morning13089.2%7.7%0.0%
Evening29072.1%19.7%0.0%

Which weekday was most reliable for STL to RDU?

Among qualifying STL-to-RDU weekday results, Wednesday had the highest on-time rate: 93.7% of 95 flights. Sunday was lowest at 69.1% across 97 flights.

DayFlightsOn time30+ minCancelled
Monday9782.5%13.4%0.0%
Tuesday9789.7%4.1%0.0%
Wednesday9593.7%2.1%0.0%
Thursday9777.3%12.4%0.0%
Friday10087.0%11.0%0.0%
Saturday6975.4%17.4%0.0%
Sunday9769.1%22.7%1.0%

Which airline was most reliable for STL to RDU?

Only Southwest Airlines met the STL-to-RDU airline threshold: 82.4% of 652 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines65282.4%11.7%0.2%

Which month was most reliable for STL to RDU?

Among qualifying STL-to-RDU month results, February 2026 had the highest on-time rate: 97.1% of 34 flights. October 2025 was lowest at 74.1% across 58 flights.

MonthFlightsOn time30+ minCancelled
July 20255879.3%19.0%0.0%
August 20255388.7%9.4%0.0%
September 20255284.6%5.8%0.0%
October 20255874.1%15.5%0.0%
November 20255879.3%17.2%0.0%
December 20256085.0%10.0%0.0%
January 20263290.6%3.1%3.1%
February 20263497.1%0.0%0.0%
March 20265974.6%13.6%0.0%
April 20266384.1%4.8%0.0%
May 20266586.2%13.8%0.0%
June 20266075.0%18.3%0.0%

What drove STL to RDU delay minutes?

Late aircraft was the largest recorded STL-to-RDU delay category, accounting for 66.3% of 6,740 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.1%
Late aircraft66.3%
National airspace5.4%
Weather2.2%
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.