Flight OddsAlaska Airlines · San Diego, CA to San Francisco, CA · 42 flights observed, 2025-12-18 to 2026-04-20 · 447 mi
AS2121 covers more than one route in the data window — the stats below are for SAN → SFO, the one it has flown most recently. The others are linked under “Other routes”.
How often is AS2121 on time?
Across 42 flights on SAN → SFO from 2025-12-18 to 2026-04-20, AS2121 arrived within 15 minutes of schedule 39% of the time. The median arrival delay was +42 min, and the worst 10% of flights arrived +100 min or later. 12% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 14 | 39% |
| 16-30 min | 2 | 6% |
| 31-60 min | 4 | 11% |
| 61-120 min | 13 | 36% |
| 2+ hrs | 3 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 11 | 45% | +35 min |
| 2026-01 | 3 | 33% | +48 min |
| 2026-03 | 10 | 70% | +12 min |
| 2026-04 | 12 | 8% | +73 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 43% |
| Tue | 2 | 100% |
| Wed | 2 | 50% |
| Thu | 7 | 14% |
| Fri | 7 | 29% |
| Sat | 4 | 75% |
| Sun | 7 | 29% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…