United Airlines SFO to STL on-time performance
United Airlines nonstop flights from San Francisco to St. Louis · Aug 2025 – Jul 2026
On-time arrivals
82%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
11 min
54 min when late
Rank on route
#1 of 3
route average 64% on time
Key facts
- United Airlines flights on SFO to STL arrived on time 82% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 3 airlines on this route, which averaged 64% on time overall.
- The largest source of delay minutes was late-arriving aircraft (57%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft57%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion14%
- Extreme weather0%
- Security0%
Other airlines on SFO to STL
- Southwest Airlines45% on time · 34 min avg delay
- SkyWest Airlines78% on time · 20 min avg delay
Full SFO to STL comparison →
United Airlines on-time record across all routes →
183 United Airlines flights tracked on this route; 0 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.