Delta Air Lines ORD to SEA on-time performance
Delta Air Lines nonstop flights from Chicago to Seattle · Aug 2025 – Jul 2026
On-time arrivals
67%
arrived < 15 min late
Cancelled
1.4%
13 flights
Avg arrival delay
24 min
69 min when late
Rank on route
#2 of 4
route average 68% on time
Key facts
- Delta Air Lines flights on ORD to SEA arrived on time 67% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 9% arrived an hour or more late.
- That ranks #2 of 4 airlines on this route, which averaged 68% on time overall.
- The largest source of delay minutes was late-arriving aircraft (32%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft32%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion23%
- Extreme weather15%
- Security0%
Other airlines on ORD to SEA
- Alaska Airlines67% on time · 23 min avg delay
- United Airlines75% on time · 16 min avg delay
- American Airlines63% on time · 26 min avg delay
Full ORD to SEA comparison →
Delta Air Lines on-time record across all routes →
907 Delta Air Lines flights tracked on this route; 13 cancelled, 6 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.