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

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

73.1% of 2,061 official scheduled MDT-to-ORD flights arrived on time; 16.2% arrived at least 30 minutes late and 2.9% 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
73.1%arrived on time
16.2%30+ min late
2.9%cancelled
2,061scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.5%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+13.0 mincompleted flights

Which departure time was most reliable for MDT to ORD?

Among qualifying MDT-to-ORD departure window results, Early morning had the highest on-time rate: 85.1% of 790 flights. Evening was lowest at 57.4% across 603 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning79085.1%8.2%1.8%
Late morning43776.7%14.9%1.8%
Afternoon23166.7%21.2%2.6%
Evening60357.4%25.5%5.1%

Which weekday was most reliable for MDT to ORD?

Among qualifying MDT-to-ORD weekday results, Wednesday had the highest on-time rate: 77.6% of 277 flights. Sunday was lowest at 66.5% across 319 flights.

DayFlightsOn time30+ minCancelled
Monday31473.6%15.0%3.8%
Tuesday29275.0%16.4%1.0%
Wednesday27777.6%13.7%1.4%
Thursday30273.5%16.6%2.3%
Friday29970.2%16.1%2.7%
Saturday25876.7%14.7%1.6%
Sunday31966.5%20.1%6.6%

Which airline was most reliable for MDT to ORD?

Among qualifying MDT-to-ORD airline results, Republic Airways had the highest on-time rate: 82.5% of 292 flights. SkyWest Airlines was lowest at 64.1% across 262 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air71772.7%17.0%2.8%
United Airlines57074.9%13.0%2.3%
Republic Airways29282.5%9.9%2.1%
SkyWest Airlines26264.1%24.8%3.4%
American Airlines22068.2%19.5%5.0%

Which month was most reliable for MDT to ORD?

Among qualifying MDT-to-ORD month results, August 2025 had the highest on-time rate: 84.5% of 129 flights. December 2025 was lowest at 52.8% across 161 flights.

MonthFlightsOn time30+ minCancelled
July 202512973.6%17.8%2.3%
August 202512984.5%7.0%3.9%
September 202512983.7%9.3%0.0%
October 202517074.7%16.5%0.0%
November 202519674.5%16.8%4.1%
December 202516152.8%33.5%3.7%
January 202617267.4%16.3%5.8%
February 202616776.0%15.0%1.8%
March 202617763.3%20.3%4.5%
April 202624474.2%14.3%2.5%
May 202621379.8%9.9%2.8%
June 202617475.3%16.7%2.3%

What drove MDT to ORD delay minutes?

Late aircraft was the largest recorded MDT-to-ORD delay category, accounting for 36.3% of 42,225 BTS-attributed delay minutes during July 2025–June 2026.

Airline20.1%
Late aircraft36.3%
National airspace32.4%
Weather11.1%
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.