United Airlines PHL to SFO on-time performance
United Airlines nonstop flights from Philadelphia to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
71%
arrived < 15 min late
Cancelled
0.7%
5 flights
Avg arrival delay
22 min
74 min when late
Rank on route
#2 of 2
route average 73% on time
Key facts
- United Airlines flights on PHL to SFO arrived on time 71% of the time in Aug 2025 – Jul 2026.
- 0.7% were cancelled, and 11% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 73% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (59%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion59%
- Late-arriving aircraft14%
- Airline (crew, maintenance, cleaning, fueling)13%
- Extreme weather13%
- Security0%
Other airlines on PHL to SFO
- American Airlines73% on time · 21 min avg delay
Full PHL to SFO comparison →
United Airlines on-time record across all routes →
727 United Airlines flights tracked on this route; 5 cancelled, 0 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.