Flight OddsUA1577 SFO → SEA
United Airlines · San Francisco, CA to Seattle, WA · 71 flights observed, 2025-09-25 to 2026-06-30 · 679 mi
UA1577 covers more than one route in the data window — the stats below are for SFO → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
72%
Median delay
+3 min
90th percentile
+46 min
Cancellation rate
0%
How often is UA1577 on time?
Across 71 flights on SFO → SEA from 2025-09-25 to 2026-06-30, UA1577 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was +3 min, and the worst 10% of flights arrived +46 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 51 | 72% |
| 16-30 min | 11 | 15% |
| 31-60 min | 3 | 4% |
| 61-120 min | 3 | 4% |
| 2+ hrs | 3 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 83% | +2 min |
| 2025-10 | 24 | 71% | +5 min |
| 2026-05 | 11 | 73% | +18 min |
| 2026-06 | 30 | 70% | +23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 70% |
| Tue | 10 | 80% |
| Wed | 9 | 44% |
| Thu | 11 | 64% |
| Fri | 11 | 73% |
| Sat | 10 | 100% |
| Sun | 10 | 70% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…