Historical on-time performance
Harrisburg to Chicago
Flights on MDT–ORD arrive on time 74% of the time over the last 12 months.
based on 1,766 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Republic AirwaysOn-time84%Medianon timep9020 minCancel1.2%Flights166
- United AirlinesOn-time77%Medianon timep9030 minCancel2.3%Flights511
- Envoy AirOn-time73%Medianon timep9055 minCancel2.6%Flights778
- American AirlinesOn-time71%Medianon timep9065 minCancel5.3%Flights190
- SkyWest AirlinesOn-time62%Medianon timep90135 minCancel3.3%Flights121
Why flights run late
Delay causes
- Airline22%
- Weather12%
- Air traffic (NAS)28%
- Late aircraft39%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline10%
- Weather60%
- Air traffic (NAS)29%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 48 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MDT → ORD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 1,602 flights
- Middays78% on time · p90 45 min · 942 flights
- Afternoons71% on time · p90 85 min · 251 flights
- Evenings67% on time · p90 55 min · 1,286 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Saturdays79% on time · p90 45 min · 541 flights
- Tuesdays79% on time · p90 45 min · 590 flights
- Wednesdays78% on time · p90 40 min · 586 flights
- Thursdays78% on time · p90 40 min · 601 flights
- Mondays78% on time · p90 40 min · 617 flights
- Fridays75% on time · p90 45 min · 604 flights
- Sundays72% on time · p90 50 min · 616 flights
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