Flight OddsORD → BOS United Airlines
United Airlines · Chicago, IL to Boston, MA · 2,680 flights, 2025-07-01 to 2026-06-30 · aggregated across 46 flight numbers
On-time arrival
70%
Median delay
-2 min
90th percentile
+80 min
Cancellation rate
2%
How on-time is United Airlines from ORD to BOS?
Across every United Airlines flight number on ORD → BOS (2,680 flights, 2025-07-01 to 2026-06-30), 70% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +80 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,825 | 70% |
| 16-30 min | 182 | 7% |
| 31-60 min | 254 | 10% |
| 61-120 min | 211 | 8% |
| 2+ hrs | 153 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 244 | 65% | +22 min |
| 2025-08 | 243 | 75% | +12 min |
| 2025-09 | 239 | 47% | +43 min |
| 2025-10 | 249 | 59% | +29 min |
| 2025-11 | 224 | 75% | +20 min |
| 2025-12 | 177 | 70% | +20 min |
| 2026-01 | 159 | 75% | +11 min |
| 2026-02 | 141 | 79% | +5 min |
| 2026-03 | 191 | 70% | +19 min |
| 2026-04 | 206 | 71% | +14 min |
| 2026-05 | 266 | 78% | +7 min |
| 2026-06 | 286 | 74% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 404 | 69% |
| Tue | 345 | 71% |
| Wed | 348 | 69% |
| Thu | 410 | 64% |
| Fri | 416 | 69% |
| Sat | 297 | 80% |
| Sun | 405 | 67% |
UA flight numbers on ORD → BOS
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…