No delays reported for DL 438 (SEA→BOS, SLC→JAC, JAC→SLC) as of 6:43 PM ET. It arrived on time 58.7% of the time in June-August 2026. When it was late, the average delay was 1h 20m. None were cancelled. Right now there are no reported delays at SEA, BOS, SLC, JAC.
May not fly today
Leg 1 of 3 (SEA → BOS): Should be in the air from SEA, scheduled to land at BOS at 7:43 PM local time. This flight number flew about 6 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.
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SEA → BOS Seattle, WA to Boston, MA | 11:15 AM → 7:43 PM | 56% |
| SLC → JAC Salt Lake City, UT to Jackson, WY | 3:50 PM → 4:59 PM | 83% |
| JAC → SLC Jackson, WY to Salt Lake City, UT | 5:59 PM → 7:06 PM | 67% |
Local times. Schedules change; check your booking.
How reliable is DL 438?
| Arrived on time (within 15 min) | 58.7% |
| Average delay when late | 80 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly DL 438
DL 438 was most reliable on Wednesdays (77% on time) and least reliable on Mondays (43%).
| Monday | |
| Tuesday | |
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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 → BOS
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 438 delayed today?
Right now there are no reported delays at SEA, BOS, SLC, JAC. Checked 6:43 PM ET. For this flight's gate and exact status, check the Delta app.
Is DL 438 usually on time?
DL 438 arrived within 15 minutes of schedule 58.7% of the time in June-August 2026, with an average delay of 80 minutes when late.
How often is DL 438 cancelled?
0% of DL 438 flights were cancelled in June-August 2026.