Flight OddsDL4439 SMF → SEA
Delta Air Lines · Sacramento, CA to Seattle, WA · 122 flights observed, 2026-01-05 to 2026-05-06 · 605 mi
On-time arrival
93%
Median delay
-12 min
90th percentile
+13 min
Cancellation rate
2%
How often is DL4439 on time?
Across 122 flights on SMF → SEA from 2026-01-05 to 2026-05-06, DL4439 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +13 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 111 | 93% |
| 16-30 min | 2 | 2% |
| 31-60 min | 2 | 2% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 4 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 26 | 88% | +1 min |
| 2026-02 | 28 | 96% | -2 min |
| 2026-03 | 30 | 90% | -1 min |
| 2026-04 | 30 | 93% | -7 min |
| 2026-05 | 6 | 100% | -18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 17 | 94% |
| Tue | 18 | 100% |
| Wed | 18 | 100% |
| Thu | 17 | 100% |
| Fri | 16 | 81% |
| Sat | 17 | 88% |
| Sun | 17 | 82% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…