Alaska Airlines DTW to SEA on-time performance
Alaska Airlines nonstop flights from Detroit to Seattle · Aug 2025 – Jul 2026
On-time arrivals
75%
arrived < 15 min late
Cancelled
0.2%
1 flights
Avg arrival delay
13 min
47 min when late
Rank on route
#1 of 2
route average 73% on time
Key facts
- Alaska Airlines flights on DTW to SEA arrived on time 75% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 73% on time overall.
- The largest source of delay minutes was late-arriving aircraft (47%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft47%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)19%
- Extreme weather5%
- Security1%
Other airlines on DTW to SEA
- Delta Air Lines73% on time · 17 min avg delay
Full DTW to SEA comparison →
Alaska Airlines on-time record across all routes →
544 Alaska Airlines flights tracked on this route; 1 cancelled, 1 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.