Flight OddsUA1800 ORD → BOS
United Airlines · Chicago, IL to Boston, MA · 34 flights observed, 2026-05-21 to 2026-06-24 · 867 mi
UA1800 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
61%
Median delay
-3 min
90th percentile
+114 min
Cancellation rate
3%
How often is UA1800 on time?
Across 34 flights on ORD → BOS from 2026-05-21 to 2026-06-24, UA1800 arrived within 15 minutes of schedule 61% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +114 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 20 | 61% |
| 16-30 min | 3 | 9% |
| 31-60 min | 3 | 9% |
| 61-120 min | 3 | 9% |
| 2+ hrs | 4 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 10 | 90% | -18 min |
| 2026-06 | 23 | 48% | +37 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 60% |
| Tue | 5 | 40% |
| Wed | 5 | 40% |
| Thu | 4 | 50% |
| Fri | 5 | 100% |
| Sat | 5 | 100% |
| 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…