Historical on-time performance
Chicago to Harrisburg
Flights on ORD–MDT arrive on time 71% 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
- Republic AirwaysOn-time78%Medianon timep9025 minCancel4.2%Flights165
- Envoy AirbestOn-time74%Medianon timep9050 minCancel2.6%Flights778
- United AirlinesOn-time68%Medianon timep9065 minCancel2.0%Flights511
- SkyWest AirlinesOn-time67%Medianon timep9065 minCancel3.3%Flights122
- American AirlinesOn-time61%Medianon timep9095 minCancel5.3%Flights190
Why flights run late
Delay causes
- Airline26%
- Weather9%
- Air traffic (NAS)18%
- Late aircraft48%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline4%
- Weather63%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 51 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 ORD → MDT
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 66% to 79% on time.
- Middays79% on time · p90 40 min · 999 flights
- Mornings79% on time · p90 35 min · 942 flights
- Afternoons73% on time · p90 55 min · 721 flights
- Evenings67% on time · p90 70 min · 1,128 flights
- Overnights66% on time · p90 65 min · 368 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 76% on time.
- Wednesdays76% on time · p90 45 min · 585 flights
- Tuesdays76% on time · p90 50 min · 589 flights
- Fridays75% on time · p90 40 min · 604 flights
- Saturdays75% on time · p90 55 min · 544 flights
- Mondays74% on time · p90 55 min · 617 flights
- Thursdays74% on time · p90 55 min · 604 flights
- Sundays67% on time · p90 60 min · 616 flights
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