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

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

Historically, 73.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 2,340 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.