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

Rochester, NY (ROC) to Chicago, IL (ORD) flight delay odds

73.1% of 2,340 official scheduled ROC-to-ORD flights arrived on time; 16.5% arrived at least 30 minutes late and 2.1% 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 SIGNALGenerally reliable
73.1%arrived on time
16.5%30+ min late
2.1%cancelled
2,340scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.6%all scheduled flights
120+ minutes late5.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+14.9 mincompleted flights

Which departure time was most reliable for ROC to ORD?

Among qualifying ROC-to-ORD departure window results, Early morning had the highest on-time rate: 83.7% of 705 flights. Evening was lowest at 51.5% across 701 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning70583.7%9.1%1.3%
Late morning48283.6%11.2%0.6%
Afternoon45079.1%12.2%2.4%
Evening70151.5%30.2%3.9%

Which weekday was most reliable for ROC to ORD?

Among qualifying ROC-to-ORD weekday results, Tuesday had the highest on-time rate: 76.9% of 342 flights. Sunday was lowest at 66.4% across 342 flights.

DayFlightsOn time30+ minCancelled
Monday35472.6%18.1%4.2%
Tuesday34276.9%13.5%1.2%
Wednesday33470.1%18.3%0.9%
Thursday34175.4%14.7%2.1%
Friday34074.4%12.9%1.8%
Saturday28776.3%15.3%1.4%
Sunday34266.4%22.8%3.2%

Which airline was most reliable for ROC to ORD?

Among qualifying ROC-to-ORD airline results, Republic Airways had the highest on-time rate: 79.2% of 711 flights. SkyWest Airlines was lowest at 60.4% across 225 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air81375.9%14.5%2.2%
Republic Airways71179.2%12.5%2.4%
United Airlines59166.7%19.8%1.4%
SkyWest Airlines22560.4%28.0%3.1%

Which month was most reliable for ROC to ORD?

Among qualifying ROC-to-ORD month results, May 2026 had the highest on-time rate: 81.1% of 222 flights. December 2025 was lowest at 61.3% across 194 flights.

MonthFlightsOn time30+ minCancelled
July 202520168.7%19.4%1.0%
August 202519177.5%13.6%2.6%
September 202520680.1%10.7%0.5%
October 202520073.0%16.0%0.0%
November 202522571.6%16.0%4.0%
December 202519461.3%24.7%3.1%
January 202615765.6%21.0%3.8%
February 202616071.2%20.0%0.6%
March 202615469.5%19.5%3.2%
April 202622074.5%15.9%3.6%
May 202622281.1%10.4%1.4%
June 202621078.6%14.8%1.9%

What drove ROC to ORD delay minutes?

Late aircraft was the largest recorded ROC-to-ORD delay category, accounting for 36.3% of 53,323 BTS-attributed delay minutes during July 2025–June 2026.

Airline24.5%
Late aircraft36.3%
National airspace36.0%
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.