Flight OddsDL1521 BOS → BNA
Delta Air Lines · Boston, MA to Nashville, TN · 30 flights observed, 2025-08-11 to 2025-09-10 · 942 mi
DL1521 covers more than one route in the data window — the stats below are for BOS → BNA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
63%
Median delay
0 min
90th percentile
+87 min
Cancellation rate
0%
How often is DL1521 on time?
Across 30 flights on BOS → BNA from 2025-08-11 to 2025-09-10, DL1521 arrived within 15 minutes of schedule 63% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +87 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 | 19 | 63% |
| 16-30 min | 1 | 3% |
| 31-60 min | 3 | 10% |
| 61-120 min | 6 | 20% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 20 | 75% | +7 min |
| 2025-09 | 10 | 40% | +40 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 80% |
| Wed | 5 | 60% |
| Thu | 4 | 25% |
| Fri | 4 | 50% |
| Sat | 3 | 67% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…