Delta Air Lines Flight 423: On-Time History
Data through July 2026
Delta Air Lines DL 423 (ATL to SLC, usually departing around 13:59) has been a dependable choice: 85% of its 761 flights arrived on time, 7 points above the national average, with 0.7% cancelled.
Segments flown as DL 423
| Segment | Typical departure | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|---|
| ATL → SLC | 1:59 p.m. | 85% | 9 min | 0.7% | 761 |
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 85% of 761 flights between 2024-07 and 2026-07. The national average over the same period was 78%.
- How often is DL 423 cancelled?
- 0.7% 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 761 recorded flights.
Full route statistics for these segments
Based on 761 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.