United Airlines SEA to ORD on-time performance
United Airlines nonstop flights from Seattle to Chicago · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
0.9%
13 flights
Avg arrival delay
19 min
89 min when late
Rank on route
#1 of 4
route average 76% on time
Key facts
- United Airlines flights on SEA to ORD arrived on time 80% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (44%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion44%
- Airline (crew, maintenance, cleaning, fueling)31%
- Late-arriving aircraft23%
- Extreme weather2%
- Security0%
Other airlines on SEA to ORD
- Alaska Airlines73% on time · 17 min avg delay
- American Airlines73% on time · 28 min avg delay
- Delta Air Lines77% on time · 18 min avg delay
Full SEA to ORD comparison →
United Airlines on-time record across all routes →
1,503 United Airlines flights tracked on this route; 13 cancelled, 11 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.