Flight OddsDL3978 SLC → BOI
Delta Air Lines · Salt Lake City, UT to Boise, ID · 16 flights observed, 2025-12-20 to 2026-01-04 · 290 mi
DL3978 covers more than one route in the data window — the stats below are for SLC → BOI, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
100%
Median delay
-12 min
90th percentile
+4 min
Cancellation rate
0%
How often is DL3978 on time?
Across 16 flights on SLC → BOI from 2025-12-20 to 2026-01-04, DL3978 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +4 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 | 16 | 100% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 12 | 100% | -10 min |
| 2026-01 | 4 | 100% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 100% |
| Tue | 2 | 100% |
| Wed | 2 | 100% |
| Thu | 2 | 100% |
| Fri | 2 | 100% |
| Sat | 3 | 100% |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…