Delta Air Lines SEA to ORD on-time performance
Delta Air Lines nonstop flights from Seattle to Chicago · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
1.2%
11 flights
Avg arrival delay
18 min
73 min when late
Rank on route
#2 of 4
route average 76% on time
Key facts
- Delta Air Lines flights on SEA to ORD arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 1.2% were cancelled, and 9% arrived an hour or more late.
- That ranks #2 of 4 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)45%
- Air traffic control & airport congestion36%
- Late-arriving aircraft19%
- Extreme weather0%
- Security0%
Other airlines on SEA to ORD
- Alaska Airlines73% on time · 17 min avg delay
- United Airlines80% on time · 19 min avg delay
- American Airlines73% on time · 28 min avg delay
Full SEA to ORD comparison →
Delta Air Lines on-time record across all routes →
907 Delta Air Lines flights tracked on this route; 11 cancelled, 15 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.