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

Chicago, IL (ORD) to Harrisburg, PA (MDT) flight delay odds

70.3% of 2,061 official scheduled ORD-to-MDT flights arrived on time; 18.3% arrived at least 30 minutes late and 3.2% 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 SIGNALVariable
70.3%arrived on time
18.3%30+ min late
3.2%cancelled
2,061scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.9%all scheduled flights
120+ minutes late4.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+12.7 mincompleted flights

Which departure time was most reliable for ORD to MDT?

Among qualifying ORD-to-MDT departure window results, Early morning had the highest on-time rate: 78.3% of 411 flights. Evening was lowest at 63.2% across 658 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning41178.3%11.4%1.2%
Late morning11969.7%20.2%3.4%
Afternoon77672.2%16.5%2.8%
Evening65863.2%24.5%4.1%
Night9770.1%17.5%7.2%

Which weekday was most reliable for ORD to MDT?

Among qualifying ORD-to-MDT weekday results, Saturday had the highest on-time rate: 74.6% of 260 flights. Sunday was lowest at 64.6% across 319 flights.

DayFlightsOn time30+ minCancelled
Monday31468.2%21.3%4.1%
Tuesday28973.0%17.0%1.0%
Wednesday27872.3%18.3%2.2%
Thursday30270.9%16.6%3.6%
Friday29969.9%17.7%1.7%
Saturday26074.6%17.3%3.5%
Sunday31964.6%19.4%5.6%

Which airline was most reliable for ORD to MDT?

Among qualifying ORD-to-MDT airline results, Republic Airways had the highest on-time rate: 76.1% of 293 flights. American Airlines was lowest at 62.3% across 220 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air71674.6%15.4%2.8%
United Airlines57067.0%21.2%2.1%
Republic Airways29376.1%12.3%4.4%
SkyWest Airlines26266.0%22.5%3.4%
American Airlines22062.3%23.2%5.0%

Which month was most reliable for ORD to MDT?

Among qualifying ORD-to-MDT month results, September 2025 had the highest on-time rate: 82.9% of 129 flights. July 2025 was lowest at 60.5% across 129 flights.

MonthFlightsOn time30+ minCancelled
July 202512960.5%27.1%2.3%
August 202512975.2%10.9%3.9%
September 202512982.9%10.9%0.0%
October 202517180.1%14.0%0.0%
November 202519674.5%14.3%5.6%
December 202516065.0%25.6%3.1%
January 202617262.8%22.1%5.2%
February 202616769.5%18.0%1.8%
March 202617865.2%25.3%4.5%
April 202624364.2%19.3%4.1%
May 202621479.4%11.7%1.9%
June 202617365.9%20.8%4.0%

What drove ORD to MDT delay minutes?

Late aircraft was the largest recorded ORD-to-MDT delay category, accounting for 45.2% of 38,838 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.7%
Late aircraft45.2%
National airspace18.3%
Weather9.7%
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.