Route
BOI → SJC
Boise Air Terminal/Gowen Field Mineta San Jose International Airport
523 miles
Return route SJC → BOI →
How punctual is this route?
- On-time arrivals
- 86.5%
- Less than 15 minutes late
- Cancelled
- 0.2%
- Of scheduled flights
- Average delay when late
- 61 min
- Flights arriving 15+ minutes late
- Flights tracked
- 645
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 4%
- Extreme weather 2%
- 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 | 81.7% | 60 |
| October 2025 | 82.8% | 58 |
| November 2025 | 85.2% | 62 |
| December 2025 | 84.5% | 71 |
| January 2026 | 93.3% | 60 |
| February 2026 | 89.5% | 38 |
| March 2026 | 85.3% | 34 |
| April 2026 | 82.6% | 46 |
| May 2026 | 83.0% | 47 |
| June 2026 | 84.5% | 58 |
| July 2026 | 91.9% | 62 |
| August 2026 | 93.9% | 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 |
|---|---|---|---|---|
| Southwest Airlines | 330 | 80.3% | 0.0% | 56 min |
| SkyWest Airlines | 315 | 93.0% | 0.3% | 79 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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