About 1 in 7 AS 313 flights from Seattle arrived 15+ minutes late, diverted or cancelled over the past year (15%); 0.3% were cancelled. The typical flight landed 8 minutes early.
AS 313: SEA → DTW
Scheduled to leave Seattle at 9:18 a.m. local time. Over the past year it arrived on time 85% of the time (362 flights), in line with other AS flights on the route at that hour (83%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 83% |
| Tuesday | 52 | 88% |
| Wednesday | 52 | 90% |
| Thursday | 51 | 82% |
| Friday | 52 | 81% |
| Saturday | 50 | 90% |
| Sunday | 52 | 81% |
Why it was late
All flights SEA → DTW · Connecting off AS 313? Check the risk
AS 313: DTW → SEA
Scheduled to leave Detroit at 5:31 p.m. local time. Over the past year it arrived on time 74% of the time (332 flights), worse than other AS flights on the route at that hour (78%). Last seen in the data Aug 31, 2026.
Usually Alaska Airlines's last flight of the day from Detroit to Seattle (50% of days). Alaska Airlines's last DTW–SEA flight was cancelled 1.1% of the time, against 0.0% for its earlier ones. If it's cancelled, the next Alaska Airlines flight is usually around 7:01 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 78% |
| Tuesday | 49 | 82% |
| Wednesday | 47 | 74% |
| Thursday | 46 | 61% |
| Friday | 49 | 73% |
| Saturday | 42 | 86% |
| Sunday | 49 | 67% |
Why it was late
All flights DTW → SEA · Connecting off AS 313? Check the risk
Questions
How often is AS 313 from SEA to DTW late?
Alaska Airlines 313 from Seattle, WA to Detroit, MI arrived 15 or more minutes late, was diverted or was cancelled on 15% of 362 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
How often is AS 313 from DTW to SEA late?
Alaska Airlines 313 from Detroit, MI to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 26% of 332 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Alaska Airlines for today's flight. Method.