Route
SJC → BOI
Mineta San Jose International Airport Boise Air Terminal/Gowen Field
523 miles
Return route BOI → SJC →
How punctual is this route?
- On-time arrivals
- 82.6%
- Less than 15 minutes late
- Cancelled
- 0.3%
- Of scheduled flights
- Average delay when late
- 54 min
- Flights arriving 15+ minutes late
- Flights tracked
- 663
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 67%
- Airline (crew, maintenance, cleaning) 17%
- Air traffic control & airport 12%
- Extreme weather 3%
- 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 | 88.1% | 60 |
| October 2025 | 85.2% | 54 |
| November 2025 | 90.2% | 62 |
| December 2025 | 85.9% | 71 |
| January 2026 | 95.0% | 60 |
| February 2026 | 95.8% | 48 |
| March 2026 | 90.9% | 44 |
| April 2026 | 74.5% | 47 |
| May 2026 | 59.6% | 47 |
| June 2026 | 64.4% | 59 |
| July 2026 | 72.1% | 62 |
| August 2026 | 87.8% | 49 |
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 |
|---|---|---|---|---|
| SkyWest Airlines | 333 | 86.4% | 0.6% | 58 min |
| Southwest Airlines | 330 | 78.7% | 0.0% | 52 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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