United Airlines IAD to PIT on-time performance
United Airlines nonstop flights from Washington to Pittsburgh · Aug 2025 – Jul 2026
On-time arrivals
87%
arrived < 15 min late
Cancelled
0.8%
4 flights
Avg arrival delay
11 min
77 min when late
Rank on route
#1 of 2
route average 85% on time
Key facts
- United Airlines flights on IAD to PIT arrived on time 87% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 85% on time overall.
- The largest source of delay minutes was late-arriving aircraft (37%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft37%
- Airline (crew, maintenance, cleaning, fueling)28%
- Air traffic control & airport congestion26%
- Extreme weather8%
- Security0%
Other airlines on IAD to PIT
- Republic Airways83% on time · 12 min avg delay
Full IAD to PIT comparison →
United Airlines on-time record across all routes →
516 United Airlines flights tracked on this route; 4 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.