Flight OddsDL571 SAN → BOS
Delta Air Lines · San Diego, CA to Boston, MA · 162 flights observed, 2025-07-01 to 2026-06-30 · 2,588 mi
DL571 covers more than one route in the data window — the stats below are for SAN → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-9 min
90th percentile
+27 min
Cancellation rate
0%
How often is DL571 on time?
Across 162 flights on SAN → BOS from 2025-07-01 to 2026-06-30, DL571 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +27 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 135 | 84% |
| 16-30 min | 10 | 6% |
| 31-60 min | 12 | 7% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 77% | -1 min |
| 2025-08 | 31 | 94% | -7 min |
| 2025-09 | 30 | 73% | +38 min |
| 2025-10 | 5 | 100% | -14 min |
| 2026-02 | 7 | 71% | +1 min |
| 2026-03 | 3 | 67% | +333 min |
| 2026-05 | 25 | 88% | -4 min |
| 2026-06 | 30 | 90% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 21 | 76% |
| Tue | 25 | 92% |
| Wed | 24 | 79% |
| Thu | 22 | 86% |
| Fri | 22 | 95% |
| Sat | 25 | 88% |
| Sun | 22 | 68% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…