Flight OddsUA664 ORD → BOS
United Airlines · Chicago, IL to Boston, MA · 37 flights observed, 2025-08-19 to 2025-09-24 · 867 mi
UA664 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
30%
Median delay
+40 min
90th percentile
+173 min
Cancellation rate
0%
How often is UA664 on time?
Across 37 flights on ORD → BOS from 2025-08-19 to 2025-09-24, UA664 arrived within 15 minutes of schedule 30% of the time. The median arrival delay was +40 min, and the worst 10% of flights arrived +173 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 | 11 | 30% |
| 16-30 min | 4 | 11% |
| 31-60 min | 11 | 30% |
| 61-120 min | 4 | 11% |
| 2+ hrs | 7 | 19% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 13 | 62% | +22 min |
| 2025-09 | 24 | 13% | +84 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 40% |
| Tue | 6 | 33% |
| Wed | 6 | 33% |
| Thu | 5 | 20% |
| Fri | 5 | 0% |
| Sat | 5 | 60% |
| Sun | 5 | 20% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…