Flight OddsDL571 BOS → SAN
Delta Air Lines · Boston, MA to San Diego, CA · 364 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 BOS → SAN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
70%
Median delay
+1 min
90th percentile
+43 min
Cancellation rate
2%
How often is DL571 on time?
Across 364 flights on BOS → SAN from 2025-07-01 to 2026-06-30, DL571 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +43 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 245 | 70% |
| 16-30 min | 50 | 14% |
| 31-60 min | 33 | 9% |
| 61-120 min | 20 | 6% |
| 2+ hrs | 4 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 74% | +3 min |
| 2025-08 | 30 | 73% | -6 min |
| 2025-09 | 29 | 59% | +16 min |
| 2025-10 | 29 | 59% | +25 min |
| 2025-11 | 29 | 66% | +12 min |
| 2025-12 | 29 | 79% | +1 min |
| 2026-01 | 28 | 57% | +11 min |
| 2026-02 | 26 | 85% | -3 min |
| 2026-03 | 30 | 80% | -3 min |
| 2026-04 | 30 | 63% | +7 min |
| 2026-05 | 31 | 68% | +11 min |
| 2026-06 | 30 | 73% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 76% |
| Tue | 50 | 72% |
| Wed | 50 | 68% |
| Thu | 49 | 80% |
| Fri | 52 | 60% |
| Sat | 51 | 65% |
| Sun | 50 | 68% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…