United Airlines SLC to IAD on-time performance
United Airlines nonstop flights from Salt Lake City to Washington · Aug 2025 – Jul 2026
On-time arrivals
89%
arrived < 15 min late
Cancelled
1.4%
5 flights
Avg arrival delay
9 min
70 min when late
Rank on route
#1 of 2
route average 87% on time
Key facts
- United Airlines flights on SLC to IAD arrived on time 89% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 3% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 87% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (55%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)55%
- Air traffic control & airport congestion27%
- Late-arriving aircraft17%
- Extreme weather1%
- Security0%
Other airlines on SLC to IAD
- Delta Air Lines84% on time · 11 min avg delay
Full SLC to IAD comparison →
United Airlines on-time record across all routes →
348 United Airlines flights tracked on this route; 5 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.