Flight OddsDL657 SLC → BOS
Delta Air Lines · Salt Lake City, UT to Boston, MA · 365 flights observed, 2025-07-01 to 2026-06-30 · 2,105 mi
On-time arrival
82%
Median delay
-8 min
90th percentile
+35 min
Cancellation rate
1%
How often is DL657 on time?
Across 365 flights on SLC → BOS from 2025-07-01 to 2026-06-30, DL657 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +35 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 297 | 82% |
| 16-30 min | 23 | 6% |
| 31-60 min | 23 | 6% |
| 61-120 min | 14 | 4% |
| 2+ hrs | 4 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 90% | -13 min |
| 2025-08 | 31 | 90% | -9 min |
| 2025-09 | 30 | 60% | +25 min |
| 2025-10 | 31 | 58% | +25 min |
| 2025-11 | 30 | 90% | -6 min |
| 2025-12 | 31 | 77% | -1 min |
| 2026-01 | 28 | 86% | +1 min |
| 2026-02 | 27 | 93% | -13 min |
| 2026-03 | 31 | 87% | -8 min |
| 2026-04 | 30 | 83% | +2 min |
| 2026-05 | 31 | 94% | -9 min |
| 2026-06 | 30 | 80% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 82% |
| Tue | 52 | 81% |
| Wed | 52 | 85% |
| Thu | 52 | 83% |
| Fri | 52 | 79% |
| Sat | 52 | 85% |
| Sun | 51 | 82% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…