Flight OddsDL639 LAX → BOS
Delta Air Lines · Los Angeles, CA to Boston, MA · 365 flights observed, 2025-07-01 to 2026-06-30 · 2,611 mi
On-time arrival
84%
Median delay
-5 min
90th percentile
+30 min
Cancellation rate
2%
How often is DL639 on time?
Across 365 flights on LAX → BOS from 2025-07-01 to 2026-06-30, DL639 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +30 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 | 300 | 84% |
| 16-30 min | 23 | 6% |
| 31-60 min | 16 | 4% |
| 61-120 min | 6 | 2% |
| 2+ hrs | 12 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 100% | -16 min |
| 2025-08 | 31 | 100% | -10 min |
| 2025-09 | 30 | 73% | +9 min |
| 2025-10 | 31 | 71% | +18 min |
| 2025-11 | 28 | 75% | +12 min |
| 2025-12 | 30 | 87% | +4 min |
| 2026-01 | 28 | 86% | -7 min |
| 2026-02 | 27 | 78% | +12 min |
| 2026-03 | 30 | 73% | +21 min |
| 2026-04 | 30 | 80% | +9 min |
| 2026-05 | 31 | 94% | -8 min |
| 2026-06 | 30 | 90% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 82% |
| Tue | 51 | 84% |
| Wed | 52 | 81% |
| Thu | 52 | 90% |
| Fri | 52 | 90% |
| Sat | 51 | 73% |
| Sun | 49 | 88% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…