Route
ORD → SJC
Chicago O'Hare International Airport Mineta San Jose International Airport
1,829 miles
Return route SJC → ORD →
How punctual is this route?
- On-time arrivals
- 67.6%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 75 min
- Flights arriving 15+ minutes late
- Flights tracked
- 322
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 55%
- Airline (crew, maintenance, cleaning) 23%
- Air traffic control & airport 13%
- Extreme weather 9%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 90.0% | 30 |
| October 2025 | 61.3% | 31 |
| November 2025 | 66.7% | 30 |
| December 2025 | 41.7% | 12 |
| January 2026 | 100.0% | 4 |
| February 2026 | 92.9% | 14 |
| March 2026 | 69.2% | 27 |
| April 2026 | 56.7% | 30 |
| May 2026 | 74.2% | 31 |
| June 2026 | 62.1% | 30 |
| July 2026 | 69.0% | 31 |
| August 2026 | 59.6% | 52 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| United Airlines | 314 | 67.1% | 1.3% | 75 min |
| American Airlines | 8 | 87.5% | 0.0% | 41 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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