Flight OddsUnited Airlines · San Diego, CA to Washington, DC · 326 flights observed, 2025-07-01 to 2026-06-30 · 2,253 mi
UA2129 covers more than one route in the data window — the stats below are for SAN → IAD, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA2129 on time?
Across 326 flights on SAN → IAD from 2025-07-01 to 2026-06-30, UA2129 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +14 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 | 291 | 90% |
| 16-30 min | 12 | 4% |
| 31-60 min | 11 | 3% |
| 61-120 min | 4 | 1% |
| 2+ hrs | 5 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 81% | +1 min |
| 2025-08 | 31 | 90% | -9 min |
| 2025-09 | 28 | 96% | -14 min |
| 2025-10 | 27 | 96% | +10 min |
| 2025-11 | 30 | 83% | -3 min |
| 2025-12 | 29 | 93% | -11 min |
| 2026-01 | 26 | 85% | +44 min |
| 2026-02 | 20 | 95% | -18 min |
| 2026-03 | 22 | 82% | +36 min |
| 2026-04 | 21 | 100% | -19 min |
| 2026-05 | 28 | 82% | +16 min |
| 2026-06 | 30 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 44 | 89% |
| Tue | 45 | 96% |
| Wed | 51 | 90% |
| Thu | 52 | 90% |
| Fri | 52 | 87% |
| Sat | 29 | 90% |
| Sun | 50 | 90% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…