Flight OddsUA4959 GSP → IAD
United Airlines · Greer, SC to Washington, DC · 313 flights observed, 2025-07-01 to 2026-06-30 · 384 mi
On-time arrival
78%
Median delay
-6 min
90th percentile
+53 min
Cancellation rate
2%
How often is UA4959 on time?
Across 313 flights on GSP → IAD from 2025-07-01 to 2026-06-30, UA4959 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +53 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 237 | 78% |
| 16-30 min | 22 | 7% |
| 31-60 min | 18 | 6% |
| 61-120 min | 9 | 3% |
| 2+ hrs | 19 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 28 | 64% | +36 min |
| 2025-08 | 31 | 71% | +18 min |
| 2025-09 | 26 | 81% | +7 min |
| 2025-10 | 31 | 77% | +16 min |
| 2025-11 | 22 | 73% | +6 min |
| 2025-12 | 15 | 73% | +23 min |
| 2026-01 | 20 | 95% | -8 min |
| 2026-02 | 24 | 88% | +1 min |
| 2026-03 | 31 | 77% | +9 min |
| 2026-04 | 26 | 85% | -1 min |
| 2026-05 | 25 | 72% | +28 min |
| 2026-06 | 26 | 81% | +44 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 47 | 68% |
| Tue | 49 | 88% |
| Wed | 48 | 77% |
| Thu | 48 | 83% |
| Fri | 49 | 78% |
| Sat | 21 | 81% |
| Sun | 43 | 70% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…