Flight OddsDelta Air Lines · Salt Lake City, UT to San Jose, CA · 172 flights observed, 2025-07-01 to 2025-12-19 · 584 mi
DL3821 covers more than one route in the data window — the stats below are for SLC → SJC, the one it has flown most recently. The others are linked under “Other routes”.
How often is DL3821 on time?
Across 172 flights on SLC → SJC from 2025-07-01 to 2025-12-19, DL3821 arrived within 15 minutes of schedule 97% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +3 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 | 166 | 97% |
| 16-30 min | 2 | 1% |
| 31-60 min | 1 | 1% |
| 61-120 min | 2 | 1% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 100% | -8 min |
| 2025-08 | 31 | 100% | -9 min |
| 2025-09 | 30 | 97% | -9 min |
| 2025-10 | 31 | 97% | -12 min |
| 2025-11 | 29 | 93% | -10 min |
| 2025-12 | 19 | 95% | -19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 100% |
| Tue | 25 | 100% |
| Wed | 25 | 100% |
| Thu | 25 | 100% |
| Fri | 24 | 96% |
| Sat | 24 | 92% |
| Sun | 24 | 92% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…