United Airlines SAN to SFO on-time performance
United Airlines nonstop flights from San Diego to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
69%
arrived < 15 min late
Cancelled
0.5%
14 flights
Avg arrival delay
19 min
59 min when late
Rank on route
#1 of 5
route average 62% on time
Key facts
- United Airlines flights on SAN to SFO arrived on time 69% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 10% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 62% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (58%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion58%
- Late-arriving aircraft28%
- Airline (crew, maintenance, cleaning, fueling)11%
- Extreme weather3%
- Security0%
Other airlines on SAN to SFO
- Southwest Airlines55% on time · 28 min avg delay
- SkyWest Airlines65% on time · 23 min avg delay
- Alaska Airlines52% on time · 27 min avg delay
- Frontier Airlines43% on time · 45 min avg delay
Full SAN to SFO comparison →
United Airlines on-time record across all routes →
2,633 United Airlines flights tracked on this route; 14 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.