Flight OddsUnited Airlines · Washington, DC to San Francisco, CA · 145 flights observed, 2025-08-21 to 2026-02-11 · 2,418 mi
UA1129 covers more than one route in the data window — the stats below are for IAD → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA1129 on time?
Across 145 flights on IAD → SFO from 2025-08-21 to 2026-02-11, UA1129 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +55 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 | 109 | 76% |
| 16-30 min | 8 | 6% |
| 31-60 min | 14 | 10% |
| 61-120 min | 8 | 6% |
| 2+ hrs | 4 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 7 | 100% | -10 min |
| 2025-09 | 19 | 79% | -2 min |
| 2025-10 | 29 | 69% | +10 min |
| 2025-11 | 20 | 80% | +7 min |
| 2025-12 | 28 | 68% | +19 min |
| 2026-01 | 29 | 79% | +7 min |
| 2026-02 | 11 | 82% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 79% |
| Tue | 16 | 75% |
| Wed | 14 | 64% |
| Thu | 23 | 78% |
| Fri | 25 | 76% |
| Sat | 18 | 78% |
| Sun | 23 | 78% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…