Delta Air Lines Flight 423: On-Time History
Data through May 2026
Delta Air Lines DL 423 (ATL to SLC, usually departing around 13:59) has been a dependable choice: 84% of its 730 flights arrived on time, 6 points above the national average, with 0.5% cancelled.
Segments flown as DL 423
| Segment | Typical departure | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|---|
| ATL → SLC | 1:59 p.m. | 84% | 9 min | 0.5% | 730 |
A flight number can serve different segments over time; statistics are computed per segment across the full period.
Monthly on-time trend for ATL to SLC
DL 423’s most-flown segment. There is no month-by-month history for a single flight number, so this is the full route’s trend.
Frequently asked questions
- Is Delta Air Lines flight DL 423 usually on time?
- Delta Air Lines DL 423 arrived on time (within 15 minutes of schedule) on 84% of 730 flights between 2024-06 and 2026-05. The national average over the same period was 78%.
- How often is DL 423 cancelled?
- 0.5% of scheduled DL 423 flights were cancelled in this period, at or below the national rate of 1.6%.
- What time does DL 423 typically depart?
- Delta Air Lines DL 423 (ATL to SLC) typically departs around 13:59, based on 730 recorded flights.
Full route statistics for these segments
Based on 730 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.