Historical on-time performance
Chicago to Pittsburgh
412 miData through May 2026Source: US DOT · BTS
Flights on ORD–PIT arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights
based on 3,652 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirOn-time80%Medianon timep9030 minCancel2.7%Flights182
- Republic AirwaysbestOn-time79%Medianon timep9045 minCancel1.9%Flights1,548
- United AirlinesOn-time74%Medianon timep9050 minCancel0.9%Flights1,265
- SkyWest AirlinesOn-time74%Medianon timep9045 minCancel2.6%Flights115
- American AirlinesOn-time54%Median5 minp90135 minCancel2.8%Flights542
Why flights run late
Delay causes
- Airline25%
- Weather8%
- Air traffic (NAS)14%
- Late aircraft53%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline5%
- Weather65%
- Air traffic (NAS)31%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 65 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 → PIT
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 — 84% on time.
- Mornings84% on time · p90 25 min · 1,957 flights
- Middays81% on time · p90 40 min · 2,268 flights
- Afternoons76% on time · p90 45 min · 1,814 flights
- Overnights76% on time · p90 45 min · 1,430 flights
- Evenings66% on time · p90 90 min · 2,261 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 82% on time.
- Tuesdays82% on time · p90 40 min · 1,397 flights
- Saturdays79% on time · p90 40 min · 1,202 flights
- Wednesdays78% on time · p90 40 min · 1,400 flights
- Thursdays77% on time · p90 50 min · 1,438 flights
- Fridays74% on time · p90 55 min · 1,436 flights
- Mondays74% on time · p90 60 min · 1,456 flights
- Sundays73% on time · p90 60 min · 1,405 flights
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