Historical on-time performance
San Jose to Chicago
1,830 miData through Dec 2025Source: US DOT · BTS
Flights on SJC–ORD arrive on time 89% of the time over the last 12 months.
On-time rate89%arrived within 15 min
p90 delay10 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 305 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time89%Medianon timep9010 minCancel1.3%Flights305
Why flights run late
Delay causes
- Airline42%
- Weather0%
- Air traffic (NAS)30%
- Late aircraft27%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SJC → ORD
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 88% to 92% on time.
- Mornings92% on time · p90 10 min · 779 flights
- Overnights88% on time · p90 10 min · 72 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 88% to 95% on time.
- Sundays95% on time · p90 5 min · 121 flights · limited
- Wednesdays93% on time · p90 10 min · 120 flights · limited
- Thursdays93% on time · p90 5 min · 125 flights · limited
- Fridays91% on time · p90 10 min · 127 flights · limited
- Mondays91% on time · p90 10 min · 124 flights · limited
- Tuesdays90% on time · p90 10 min · 117 flights · limited
- Saturdays88% on time · p90 10 min · 120 flights · limited
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