About 1 in 5 AS 543 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (18%); 1.0% were cancelled. The typical flight landed 8 minutes early.
AS 543: DFW → SEA
Scheduled to leave Dallas at 10:00 a.m. local time. Over the past year it arrived on time 82% of the time (295 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 | 44 | 77% |
| Tuesday | 42 | 86% |
| Wednesday | 41 | 88% |
| Thursday | 43 | 84% |
| Friday | 43 | 86% |
| Saturday | 41 | 76% |
| Sunday | 41 | 76% |
Why it was late
All flights DFW → SEA · Connecting off AS 543? Check the risk
Questions
How often is AS 543 from DFW to SEA late?
Alaska Airlines 543 from Dallas/Fort Worth, TX to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 295 scheduled flights between September 2025 and August 2026. 1.0% 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.