Historical on-time performance
Chicago to San Jose
1,830 miData through Dec 2025Source: US DOT · BTS
Flights on ORD–SJC arrive on time 67% of the time over the last 12 months.
On-time rate67%arrived within 15 min
p90 delay80 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-time67%Medianon timep9080 minCancel1.3%Flights305
Why flights run late
Delay causes
- Airline43%
- Weather5%
- Air traffic (NAS)8%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → SJC
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 81% on time.
- Mornings81% on time · p90 25 min · 216 flights
- Overnights70% on time · p90 80 min · 119 flights · limited
- Evenings66% on time · p90 80 min · 492 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 74% on time.
- Mondays74% on time · p90 35 min · 124 flights · limited
- Thursdays74% on time · p90 60 min · 124 flights · limited
- Wednesdays73% on time · p90 60 min · 120 flights · limited
- Saturdays72% on time · p90 65 min · 119 flights · limited
- Tuesdays70% on time · p90 80 min · 118 flights · limited
- Fridays66% on time · p90 45 min · 125 flights · limited
- Sundays66% on time · p90 80 min · 122 flights · limited
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