United Airlines ORD to PWM on-time performance
United Airlines nonstop flights from Chicago to Portland · Aug 2025 – Jul 2026
On-time arrivals
72%
arrived < 15 min late
Cancelled
1.2%
5 flights
Avg arrival delay
19 min
66 min when late
Rank on route
#3 of 4
route average 75% on time
Key facts
- United Airlines flights on ORD to PWM arrived on time 72% of the time in Aug 2025 – Jul 2026.
- 1.2% were cancelled, and 11% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (58%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft58%
- Airline (crew, maintenance, cleaning, fueling)21%
- Air traffic control & airport congestion18%
- Extreme weather3%
- Security0%
Other airlines on ORD to PWM
- Republic Airways76% on time · 18 min avg delay
- SkyWest Airlines70% on time · 22 min avg delay
- Envoy Air82% on time · 14 min avg delay
Full ORD to PWM comparison →
United Airlines on-time record across all routes →
430 United Airlines flights tracked on this route; 5 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.