Flight OddsUA378 BOS → ORD
United Airlines · Boston, MA to Chicago, IL · 62 flights observed, 2025-08-19 to 2025-10-25 · 867 mi
UA378 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
87%
Median delay
-14 min
90th percentile
+24 min
Cancellation rate
0%
How often is UA378 on time?
Across 62 flights on BOS → ORD from 2025-08-19 to 2025-10-25, UA378 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +24 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 54 | 87% |
| 16-30 min | 2 | 3% |
| 31-60 min | 4 | 6% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 10 | 90% | -16 min |
| 2025-09 | 27 | 81% | -3 min |
| 2025-10 | 25 | 92% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 9 | 78% |
| Tue | 10 | 80% |
| Wed | 10 | 100% |
| Thu | 10 | 90% |
| Fri | 10 | 80% |
| Sat | 5 | 100% |
| Sun | 8 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…