Delta Air Lines DTW to SEA on-time performance
Delta Air Lines nonstop flights from Detroit to Seattle · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.9%
14 flights
Avg arrival delay
17 min
56 min when late
Rank on route
#2 of 2
route average 73% on time
Key facts
- Delta Air Lines flights on DTW to SEA arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 6% arrived an hour or more late.
- That ranks #2 of 2 airlines on this route, which averaged 73% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (55%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)55%
- Air traffic control & airport congestion29%
- Late-arriving aircraft15%
- Extreme weather1%
- Security0%
Other airlines on DTW to SEA
- Alaska Airlines75% on time · 13 min avg delay
Full DTW to SEA comparison →
Delta Air Lines on-time record across all routes →
1,520 Delta Air Lines flights tracked on this route; 14 cancelled, 3 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.