Flight OddsDL972 ORD → BOS
Delta Air Lines · Chicago, IL to Boston, MA · 147 flights observed, 2025-07-07 to 2025-12-19 · 867 mi
DL972 covers more than one route in the data window — the stats below are for ORD → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
57%
Median delay
+9 min
90th percentile
+133 min
Cancellation rate
1%
How often is DL972 on time?
Across 147 flights on ORD → BOS from 2025-07-07 to 2025-12-19, DL972 arrived within 15 minutes of schedule 57% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +133 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 | 82 | 57% |
| 16-30 min | 8 | 6% |
| 31-60 min | 16 | 11% |
| 61-120 min | 21 | 14% |
| 2+ hrs | 18 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 21 | 67% | +9 min |
| 2025-08 | 24 | 75% | +9 min |
| 2025-09 | 22 | 36% | +57 min |
| 2025-10 | 31 | 45% | +48 min |
| 2025-11 | 29 | 55% | +92 min |
| 2025-12 | 18 | 67% | +24 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 21 | 62% |
| Tue | 21 | 62% |
| Wed | 21 | 43% |
| Thu | 20 | 55% |
| Fri | 22 | 64% |
| Sat | 18 | 61% |
| Sun | 22 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…