Flight OddsDL4100 SJC → SEA
Delta Air Lines · San Jose, CA to Seattle, WA · 137 flights observed, 2026-01-05 to 2026-06-30 · 696 mi
DL4100 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
87%
Median delay
-12 min
90th percentile
+24 min
Cancellation rate
1%
How often is DL4100 on time?
Across 137 flights on SJC → SEA from 2026-01-05 to 2026-06-30, DL4100 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +24 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 | 118 | 87% |
| 16-30 min | 7 | 5% |
| 31-60 min | 7 | 5% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 23 | 83% | -1 min |
| 2026-02 | 24 | 88% | -5 min |
| 2026-03 | 29 | 83% | +1 min |
| 2026-04 | 30 | 83% | -4 min |
| 2026-05 | 6 | 100% | -11 min |
| 2026-06 | 24 | 96% | -17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 22 | 82% |
| Tue | 22 | 91% |
| Wed | 21 | 81% |
| Thu | 20 | 85% |
| Fri | 19 | 89% |
| Sat | 12 | 100% |
| Sun | 20 | 85% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…