Flight OddsUA2831 SEA → SFO
United Airlines · Seattle, WA to San Francisco, CA · 41 flights observed, 2026-05-21 to 2026-06-30 · 679 mi
On-time arrival
26%
Median delay
+32 min
90th percentile
+91 min
Cancellation rate
5%
How often is UA2831 on time?
Across 41 flights on SEA → SFO from 2026-05-21 to 2026-06-30, UA2831 arrived within 15 minutes of schedule 26% of the time. The median arrival delay was +32 min, and the worst 10% of flights arrived +91 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 10 | 26% |
| 16-30 min | 8 | 21% |
| 31-60 min | 11 | 28% |
| 61-120 min | 6 | 15% |
| 2+ hrs | 4 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 10 | 30% | +46 min |
| 2026-06 | 29 | 24% | +63 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 20% |
| Tue | 6 | 33% |
| Wed | 5 | 0% |
| Thu | 5 | 20% |
| Fri | 6 | 17% |
| Sat | 6 | 67% |
| Sun | 6 | 17% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…