Flight OddsUA2278 ORD → SEA
United Airlines · Chicago, IL to Seattle, WA · 138 flights observed, 2025-07-01 to 2025-12-01 · 1,721 mi
UA2278 covers more than one route in the data window — the stats below are for ORD → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
69%
Median delay
0 min
90th percentile
+81 min
Cancellation rate
0%
How often is UA2278 on time?
Across 138 flights on ORD → SEA from 2025-07-01 to 2025-12-01, UA2278 arrived within 15 minutes of schedule 69% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +81 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 | 95 | 69% |
| 16-30 min | 16 | 12% |
| 31-60 min | 10 | 7% |
| 61-120 min | 6 | 4% |
| 2+ hrs | 11 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 55% | +54 min |
| 2025-08 | 29 | 66% | +33 min |
| 2025-09 | 27 | 89% | -6 min |
| 2025-10 | 29 | 76% | +3 min |
| 2025-11 | 21 | 62% | +32 min |
| 2025-12 | 1 | 0% | +33 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 22 | 59% |
| Tue | 22 | 82% |
| Wed | 22 | 68% |
| Thu | 21 | 57% |
| Fri | 21 | 81% |
| Sat | 14 | 57% |
| Sun | 16 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…