Flight OddsUA2138 ORD → BOS
United Airlines · Chicago, IL to Boston, MA · 31 flights observed, 2025-07-01 to 2025-07-31 · 867 mi
UA2138 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
55%
Median delay
+1 min
90th percentile
+131 min
Cancellation rate
0%
How often is UA2138 on time?
Across 31 flights on ORD → BOS from 2025-07-01 to 2025-07-31, UA2138 arrived within 15 minutes of schedule 55% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +131 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 | 17 | 55% |
| 16-30 min | 3 | 10% |
| 31-60 min | 4 | 13% |
| 61-120 min | 3 | 10% |
| 2+ hrs | 4 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 55% | +32 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 5 | 80% |
| Wed | 5 | 80% |
| Thu | 5 | 20% |
| Fri | 4 | 75% |
| Sat | 4 | 50% |
| Sun | 4 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…