Flight OddsDL1128 SEA → SLC
Delta Air Lines · Seattle, WA to Salt Lake City, UT · 365 flights observed, 2025-07-01 to 2026-06-30 · 689 mi
On-time arrival
94%
Median delay
-14 min
90th percentile
+3 min
Cancellation rate
0%
How often is DL1128 on time?
Across 365 flights on SEA → SLC from 2025-07-01 to 2026-06-30, DL1128 arrived within 15 minutes of schedule 94% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +3 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 | 343 | 94% |
| 16-30 min | 9 | 2% |
| 31-60 min | 4 | 1% |
| 61-120 min | 2 | 1% |
| 2+ hrs | 6 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 100% | -11 min |
| 2025-08 | 31 | 97% | -8 min |
| 2025-09 | 30 | 93% | -8 min |
| 2025-10 | 31 | 87% | +7 min |
| 2025-11 | 30 | 100% | -19 min |
| 2025-12 | 31 | 100% | -18 min |
| 2026-01 | 31 | 97% | -14 min |
| 2026-02 | 28 | 79% | -5 min |
| 2026-03 | 30 | 80% | +4 min |
| 2026-04 | 30 | 97% | -8 min |
| 2026-05 | 31 | 100% | -19 min |
| 2026-06 | 30 | 100% | -13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 51 | 94% |
| Tue | 53 | 91% |
| Wed | 52 | 94% |
| Thu | 52 | 96% |
| Fri | 52 | 96% |
| Sat | 52 | 92% |
| Sun | 52 | 96% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…