About 1 in 6 DL 804 flights from Dallas arrived 15+ minutes late, diverted or cancelled over the past year (18%); 2.5% were cancelled. The typical flight landed 7 minutes early.
DL 804: DFW → SEA
Scheduled to leave Dallas at 6:30 a.m. local time. Over the past year it arrived on time 82% of the time (365 flights), in line with other DL 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 | 83% |
| Wednesday | 52 | 81% |
| Thursday | 52 | 87% |
| Friday | 52 | 83% |
| Saturday | 52 | 81% |
| Sunday | 52 | 81% |
Why it was late
All flights DFW → SEA · Connecting off DL 804? Check the risk
Questions
How often is DL 804 from DFW to SEA late?
Delta Air Lines 804 from Dallas/Fort Worth, TX to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 18% of 365 scheduled flights between September 2025 and August 2026. 2.5% 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 Delta Air Lines for today's flight. Method.