OnTimeStats

Historical on-time performance

MDTORD

Harrisburg to Chicago

594 miData through Dec 2025Source: US DOT · BTS

Flights on MDT–ORD arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
Median delayon timetypical arrival
p90 delay45 min1 in 10 flights is worsetail risk
Cancelled1.6%of scheduled flights

based on 1,193 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time84%
    Medianon time
    p9025 min
    Cancel0.5%
    Flights367
  • Republic Airways
    On-time83%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights107
  • SkyWest Airlines
    On-time73%
    Medianon time
    p9070 min
    Cancel1.8%
    Flights114
  • Envoy Air
    On-time73%
    Medianon time
    p9055 min
    Cancel2.5%
    Flights605

Why flights run late

Delay causes

  • Airline31%
  • Weather13%
  • Air traffic (NAS)27%
  • Late aircraft29%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.