Flight OddsDL871 SLC → SEA
Delta Air Lines · Salt Lake City, UT to Seattle, WA · 332 flights observed, 2025-07-01 to 2026-06-30 · 689 mi
On-time arrival
83%
Median delay
-8 min
90th percentile
+34 min
Cancellation rate
1%
How often is DL871 on time?
Across 332 flights on SLC → SEA from 2025-07-01 to 2026-06-30, DL871 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +34 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 | 273 | 83% |
| 16-30 min | 21 | 6% |
| 31-60 min | 20 | 6% |
| 61-120 min | 8 | 2% |
| 2+ hrs | 8 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 87% | -4 min |
| 2025-08 | 31 | 81% | +15 min |
| 2025-09 | 30 | 90% | -9 min |
| 2025-10 | 31 | 74% | -3 min |
| 2025-11 | 23 | 83% | +4 min |
| 2025-12 | 21 | 81% | +5 min |
| 2026-01 | 26 | 96% | -9 min |
| 2026-02 | 22 | 86% | +2 min |
| 2026-03 | 26 | 77% | -1 min |
| 2026-04 | 28 | 86% | +0 min |
| 2026-05 | 31 | 74% | +3 min |
| 2026-06 | 30 | 80% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 51 | 88% |
| Tue | 48 | 81% |
| Wed | 47 | 79% |
| Thu | 51 | 82% |
| Fri | 50 | 78% |
| Sat | 34 | 85% |
| Sun | 49 | 86% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…