Flight OddsDL3503 BOI → SLC
Delta Air Lines · Boise, ID to Salt Lake City, UT · 167 flights observed, 2025-07-06 to 2025-12-19 · 290 mi
DL3503 covers more than one route in the data window — the stats below are for BOI → SLC, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
96%
Median delay
-12 min
90th percentile
+3 min
Cancellation rate
0%
How often is DL3503 on time?
Across 167 flights on BOI → SLC from 2025-07-06 to 2025-12-19, DL3503 arrived within 15 minutes of schedule 96% of the time. The median arrival delay was -12 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 | 161 | 96% |
| 16-30 min | 4 | 2% |
| 31-60 min | 1 | 1% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 96% | -12 min |
| 2025-08 | 31 | 97% | -14 min |
| 2025-09 | 30 | 97% | -10 min |
| 2025-10 | 31 | 97% | -5 min |
| 2025-11 | 30 | 100% | -16 min |
| 2025-12 | 19 | 89% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 100% |
| Tue | 24 | 100% |
| Wed | 24 | 100% |
| Thu | 24 | 96% |
| Fri | 24 | 92% |
| Sat | 23 | 91% |
| Sun | 24 | 96% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…