Flight OddsDL634 SLC → ONT
Delta Air Lines · Salt Lake City, UT to Ontario, CA · 11 flights observed, 2025-12-20 to 2026-01-03 · 558 mi
DL634 covers more than one route in the data window — the stats below are for SLC → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
70%
Median delay
+13 min
90th percentile
+32 min
Cancellation rate
9%
How often is DL634 on time?
Across 11 flights on SLC → ONT from 2025-12-20 to 2026-01-03, DL634 arrived within 15 minutes of schedule 70% of the time. The median arrival delay was +13 min, and the worst 10% of flights arrived +32 min or later. 9% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 7 | 70% |
| 16-30 min | 2 | 20% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 10% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 9 | 67% | +15 min |
| 2026-01 | 1 | 100% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 100% |
| Tue | 2 | 100% |
| Wed | No data | — |
| Thu | No data | — |
| Fri | 2 | 50% |
| Sat | 2 | 50% |
| Sun | 2 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…