Flight OddsDL3840 SJC → SEA
Delta Air Lines · San Jose, CA to Seattle, WA · 98 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 SJC → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
93%
Median delay
-14 min
90th percentile
+7 min
Cancellation rate
0%
How often is DL3840 on time?
Across 98 flights on SJC → SEA from 2025-07-01 to 2026-01-04, DL3840 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +7 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 | 91 | 93% |
| 16-30 min | 2 | 2% |
| 31-60 min | 3 | 3% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 6 | 100% | -12 min |
| 2025-09 | 20 | 90% | -15 min |
| 2025-10 | 31 | 97% | -12 min |
| 2025-11 | 10 | 80% | -3 min |
| 2025-12 | 28 | 96% | -9 min |
| 2026-01 | 3 | 67% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 13 | 100% |
| Tue | 14 | 93% |
| Wed | 12 | 83% |
| Thu | 13 | 92% |
| Fri | 15 | 93% |
| Sat | 16 | 94% |
| Sun | 15 | 93% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…