Flight OddsUA499 SEA → SFO
United Airlines · Seattle, WA to San Francisco, CA · 72 flights observed, 2026-03-05 to 2026-05-20 · 679 mi
UA499 covers more than one route in the data window — the stats below are for SEA → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
49%
Median delay
+17 min
90th percentile
+70 min
Cancellation rate
1%
How often is UA499 on time?
Across 72 flights on SEA → SFO from 2026-03-05 to 2026-05-20, UA499 arrived within 15 minutes of schedule 49% of the time. The median arrival delay was +17 min, and the worst 10% of flights arrived +70 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 | 35 | 49% |
| 16-30 min | 14 | 20% |
| 31-60 min | 13 | 18% |
| 61-120 min | 7 | 10% |
| 2+ hrs | 2 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 26 | 88% | +1 min |
| 2026-04 | 26 | 31% | +32 min |
| 2026-05 | 19 | 21% | +41 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 27% |
| Tue | 11 | 64% |
| Wed | 10 | 40% |
| Thu | 11 | 36% |
| Fri | 11 | 45% |
| Sat | 8 | 75% |
| Sun | 9 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…