United Airlines ORD to SEA on-time performance
United Airlines nonstop flights from Chicago to Seattle · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
0.7%
10 flights
Avg arrival delay
16 min
58 min when late
Rank on route
#1 of 4
route average 68% on time
Key facts
- United Airlines flights on ORD to SEA arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 0.7% were cancelled, and 7% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 68% on time overall.
- The largest source of delay minutes was late-arriving aircraft (44%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft44%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)25%
- Extreme weather7%
- Security0%
Other airlines on ORD to SEA
- Alaska Airlines67% on time · 23 min avg delay
- American Airlines63% on time · 26 min avg delay
- Delta Air Lines67% on time · 24 min avg delay
Full ORD to SEA comparison →
United Airlines on-time record across all routes →
1,504 United Airlines flights tracked on this route; 10 cancelled, 2 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.