Flight OddsDL3840 SEA → SJC
Delta Air Lines · Seattle, WA to San Jose, CA · 170 flights observed, 2025-07-01 to 2026-01-04 · 696 mi
DL3840 covers more than one route in the data window — the stats below are for SEA → SJC, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
95%
Median delay
-7 min
90th percentile
+12 min
Cancellation rate
0%
How often is DL3840 on time?
Across 170 flights on SEA → SJC from 2025-07-01 to 2026-01-04, DL3840 arrived within 15 minutes of schedule 95% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +12 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 | 162 | 95% |
| 16-30 min | 1 | 1% |
| 31-60 min | 3 | 2% |
| 61-120 min | 3 | 2% |
| 2+ hrs | 1 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 100% | -6 min |
| 2025-08 | 31 | 97% | -2 min |
| 2025-09 | 30 | 97% | -7 min |
| 2025-10 | 31 | 97% | -3 min |
| 2025-11 | 12 | 92% | -8 min |
| 2025-12 | 31 | 94% | -6 min |
| 2026-01 | 4 | 50% | +45 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 23 | 100% |
| Tue | 24 | 96% |
| Wed | 24 | 92% |
| Thu | 25 | 92% |
| Fri | 25 | 88% |
| Sat | 25 | 100% |
| Sun | 24 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…