United Airlines IAD to SFO on-time performance
United Airlines nonstop flights from Washington to San Francisco · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
0.8%
22 flights
Avg arrival delay
17 min
73 min when late
Rank on route
#1 of 2
route average 79% on time
Key facts
- United Airlines flights on IAD to SFO arrived on time 79% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 79% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (41%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion41%
- Airline (crew, maintenance, cleaning, fueling)29%
- Late-arriving aircraft27%
- Extreme weather4%
- Security0%
Other airlines on IAD to SFO
- Alaska Airlines76% on time · 14 min avg delay
Full IAD to SFO comparison →
United Airlines on-time record across all routes →
2,691 United Airlines flights tracked on this route; 22 cancelled, 4 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.