No delays reported for DL 657 (SLC → BOS) as of 6:43 PM ET. It arrived on time 84.8% of the time in June-August 2026. When it was late, the average delay was 45 minutes. None were cancelled. Right now there are no reported delays at SLC, BOS.
Looks on time
Next leg SLC → BOS, scheduled 9:50 AM local time. No delays at SLC right now, and it usually runs on time.
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.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SLC → BOS Salt Lake City, UT to Boston, MA | 9:50 AM → 4:37 PM | 85% |
Local times. Schedules change; check your booking.
How reliable is DL 657?
| Arrived on time (within 15 min) | 84.8% |
| Average delay when late | 45 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 92 |
Best and worst days to fly DL 657
DL 657 was most reliable on Wednesdays (92% on time) and least reliable on Saturdays (62%).
| Monday | |
| Tuesday | |
| Wednesday | |
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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 SLC → 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 657 delayed today?
Right now there are no reported delays at SLC, BOS. Checked 6:43 PM ET. For this flight's gate and exact status, check the Delta app.
Is DL 657 usually on time?
DL 657 arrived within 15 minutes of schedule 84.8% of the time in June-August 2026, with an average delay of 45 minutes when late.
How often is DL 657 cancelled?
0% of DL 657 flights were cancelled in June-August 2026.