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

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

Historically, 78.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 465 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
78.9%arrived on time
12.3%30+ min late
1.3%cancelled
465scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.4%all scheduled flights
120+ minutes late3.2%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+4.5 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 morning23289.7%5.6%0.9%
Evening18563.8%21.6%2.2%

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
Monday6969.6%23.2%0.0%
Tuesday7081.4%7.1%0.0%
Wednesday6886.8%8.8%0.0%
Thursday6876.5%10.3%2.9%
Friday6981.2%10.1%1.4%
Saturday5288.5%9.6%0.0%
Sunday6971.0%15.9%4.3%

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
Southwest Airlines46578.9%12.3%1.3%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20253174.2%16.1%3.2%
August 20253196.8%0.0%0.0%
September 20253090.0%6.7%0.0%
October 20253193.5%0.0%0.0%
November 20252788.9%7.4%0.0%
December 20252975.9%13.8%0.0%
January 20262766.7%14.8%3.7%
February 20262777.8%14.8%0.0%
March 20265858.6%24.1%3.4%
April 20265780.7%14.0%1.8%
May 20265784.2%7.0%0.0%
June 20266075.0%16.7%1.7%

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.

Airline29.3%
Late aircraft41.1%
National airspace29.6%
Weather0.0%
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.