About 1 in 5 AS 1 flights from Washington arrived 15+ minutes late, diverted or cancelled over the past year (21%); 1.1% were cancelled. The typical flight landed 8 minutes early.
AS 1: DCA → SEA
Scheduled to leave Washington at 8:00 a.m. local time. Over the past year it arrived on time 79% of the time (365 flights), in line with other AS flights on the route at that hour (79%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 79% |
| Tuesday | 52 | 77% |
| Wednesday | 52 | 75% |
| Thursday | 52 | 81% |
| Friday | 52 | 75% |
| Saturday | 52 | 87% |
| Sunday | 52 | 77% |
Why it was late
Questions
How often is AS 1 from DCA to SEA late?
Alaska Airlines 1 from Washington, DC to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 21% of 365 scheduled flights between September 2025 and August 2026. 1.1% 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.