Flight OddsUA4311 TYS → IAD
United Airlines · Knoxville, TN to Washington, DC · 173 flights observed, 2025-07-01 to 2026-06-30 · 420 mi
UA4311 covers more than one route in the data window — the stats below are for TYS → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
91%
Median delay
-16 min
90th percentile
+11 min
Cancellation rate
1%
How often is UA4311 on time?
Across 173 flights on TYS → IAD from 2025-07-01 to 2026-06-30, UA4311 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -16 min, and the worst 10% of flights arrived +11 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 157 | 91% |
| 16-30 min | 3 | 2% |
| 31-60 min | 4 | 2% |
| 61-120 min | 6 | 3% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 93% | -8 min |
| 2025-08 | 25 | 96% | -13 min |
| 2025-09 | 24 | 96% | -14 min |
| 2025-10 | 5 | 80% | +9 min |
| 2025-11 | 29 | 93% | -11 min |
| 2025-12 | 14 | 79% | +19 min |
| 2026-01 | 4 | 100% | -14 min |
| 2026-05 | 11 | 91% | -6 min |
| 2026-06 | 30 | 87% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 26 | 92% |
| Tue | 24 | 88% |
| Wed | 23 | 100% |
| Thu | 21 | 90% |
| Fri | 26 | 88% |
| Sat | 26 | 96% |
| Sun | 26 | 85% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…