United Airlines IAD to PWM on-time performance
United Airlines nonstop flights from Washington to Portland · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
19 min
66 min when late
Rank on route
#2 of 2
route average 88% on time
Key facts
- United Airlines flights on IAD to PWM arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 9% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 88% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (30%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)30%
- Extreme weather28%
- Air traffic control & airport congestion22%
- Late-arriving aircraft20%
- Security0%
Other airlines on IAD to PWM
- Republic Airways90% on time · 8 min avg delay
Full IAD to PWM comparison →
United Airlines on-time record across all routes →
70 United Airlines flights tracked on this route; 0 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.