United Airlines BOI to SFO on-time performance
United Airlines nonstop flights from Boise to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
67%
arrived < 15 min late
Cancelled
0.9%
2 flights
Avg arrival delay
36 min
107 min when late
Rank on route
#2 of 2
route average 68% on time
Key facts
- United Airlines flights on BOI to SFO arrived on time 67% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 19% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 68% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (47%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion47%
- Airline (crew, maintenance, cleaning, fueling)32%
- Late-arriving aircraft21%
- Extreme weather0%
- Security0%
Other airlines on BOI to SFO
- SkyWest Airlines69% on time · 24 min avg delay
Full BOI to SFO comparison →
United Airlines on-time record across all routes →
231 United Airlines flights tracked on this route; 2 cancelled, 1 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.