Flight OddsDL638 BOS → ATL
Delta Air Lines · Boston, MA to Atlanta, GA · 280 flights observed, 2025-07-01 to 2026-06-27 · 946 mi
DL638 covers more than one route in the data window — the stats below are for BOS → ATL, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
79%
Median delay
-4 min
90th percentile
+35 min
Cancellation rate
1%
How often is DL638 on time?
Across 280 flights on BOS → ATL from 2025-07-01 to 2026-06-27, DL638 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -4 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 | 216 | 79% |
| 16-30 min | 26 | 9% |
| 31-60 min | 14 | 5% |
| 61-120 min | 8 | 3% |
| 2+ hrs | 10 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 66% | +11 min |
| 2025-08 | 29 | 86% | -1 min |
| 2025-09 | 30 | 70% | +16 min |
| 2025-10 | 31 | 71% | +18 min |
| 2025-11 | 30 | 80% | +7 min |
| 2025-12 | 30 | 60% | +19 min |
| 2026-01 | 4 | 100% | -24 min |
| 2026-03 | 21 | 90% | +5 min |
| 2026-04 | 21 | 95% | -4 min |
| 2026-05 | 23 | 100% | -7 min |
| 2026-06 | 26 | 81% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 39 | 72% |
| Tue | 42 | 74% |
| Wed | 42 | 88% |
| Thu | 40 | 73% |
| Fri | 40 | 80% |
| Sat | 32 | 81% |
| Sun | 39 | 85% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…