OnTimeStats

Historical on-time performance

Chicago to Baltimore

622 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–BWI arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
Median delayon timetypical arrival
p90 delay50 min1 in 10 flights is worsetail risk
Cancelled1.9%of scheduled flights

based on 2,368 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time76%
    Medianon time
    p9045 min
    Cancel1.7%
    Flights58
  • United Airlinesbest
    On-time77%
    Medianon time
    p9045 min
    Cancel0.9%
    Flights1,064
  • American Airlines
    On-time48%
    Median5 min
    p90110 min
    Cancel3.2%
    Flights31
  • Southwest Airlines
    On-time71%
    Medianon time
    p9060 min
    Cancel2.0%
    Flights357
  • Envoy Air
    On-time74%
    Medianon time
    p9045 min
    Cancel2.9%
    Flights858

Why flights run late

Delay causes

  • Airline26%
  • Weather7%
  • Air traffic (NAS)24%
  • Late aircraft43%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→ORD airportChicago→BWI airportBaltimore→Republic Airways on this routecarrier detail→Republic Airwaysairline profile→

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.