No delays reported for DL 409 (SEA → ATL) as of 6:51 PM ET. It arrived on time 85.2% of the time in June-August 2026. When it was late, the average delay was 38 minutes. None were cancelled. Right now there are no reported delays at SEA, ATL.
May not fly today
Next leg SEA → ATL, scheduled 10:58 PM local time. No delays at SEA right now, and it usually runs on time. This flight number flew about 4 days a week in June-August 2026, so it may not operate today.
Cancellation risk: Low 0% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Delta for official times.
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SEA → ATL Seattle, WA to Atlanta, GA | 10:58 PM → 6:45 AM | 85% |
Local times. Schedules change; check your booking.
How reliable is DL 409?
| Arrived on time (within 15 min) | 85.2% |
| Average delay when late | 38 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 54 |
Best and worst days to fly DL 409
DL 409 was most reliable on Tuesdays (100% on time) and least reliable on Sundays (67%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
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| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Delta to the Department of Transportation.
Other flights SEA → ATL
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Delta app.
Delta delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is DL 409 delayed today?
Right now there are no reported delays at SEA, ATL. Checked 6:51 PM ET. For this flight's gate and exact status, check the Delta app.
Is DL 409 usually on time?
DL 409 arrived within 15 minutes of schedule 85.2% of the time in June-August 2026, with an average delay of 38 minutes when late.
How often is DL 409 cancelled?
0% of DL 409 flights were cancelled in June-August 2026.