Flight OddsUA1015 BOS → ORD
United Airlines · Boston, MA to Chicago, IL · 302 flights observed, 2025-07-01 to 2026-06-30 · 867 mi
UA1015 covers more than one route in the data window — the stats below are for BOS → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
49%
Median delay
+16 min
90th percentile
+143 min
Cancellation rate
4%
How often is UA1015 on time?
Across 302 flights on BOS → ORD from 2025-07-01 to 2026-06-30, UA1015 arrived within 15 minutes of schedule 49% of the time. The median arrival delay was +16 min, and the worst 10% of flights arrived +143 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 142 | 49% |
| 16-30 min | 37 | 13% |
| 31-60 min | 42 | 15% |
| 61-120 min | 33 | 11% |
| 2+ hrs | 35 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 24% | +94 min |
| 2025-08 | 26 | 46% | +59 min |
| 2025-09 | 26 | 38% | +47 min |
| 2025-10 | 30 | 17% | +47 min |
| 2025-11 | 26 | 58% | +24 min |
| 2025-12 | 29 | 72% | +33 min |
| 2026-01 | 18 | 50% | +45 min |
| 2026-02 | 15 | 67% | +12 min |
| 2026-03 | 16 | 56% | +36 min |
| 2026-04 | 16 | 75% | +38 min |
| 2026-05 | 28 | 61% | +32 min |
| 2026-06 | 30 | 50% | +52 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 44% |
| Tue | 36 | 53% |
| Wed | 31 | 55% |
| Thu | 50 | 46% |
| Fri | 49 | 49% |
| Sat | 27 | 74% |
| Sun | 48 | 38% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…