Flight Reliability
DL 420 · Delta Air Lines
Los Angeles → Dallas–Fort Worth (LAX–DFW)
82
Pretty Reliable
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.7%
- Cancelled
- 7 min early
- Median arrival delay
Based on 358 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 420 arrived on time 85% of the time on Mondays. On Sundays: 70%.
A bit ahead of the LAX–DFW route.
DL 420 arrived on time 81% of the time, versus 75% across the LAX–DFW route.
The breakdown
- Mon85%(52 flights)
- Tue78%(51 flights)
- Wed85%(52 flights)
- Thu85%(52 flights)
- Fri82%(49 flights)
- Sat83%(46 flights)
- Sun70%(50 flights)
68%
May
Jun 80% → May 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 80% | 30 |
| July 2025 | 73% | 30 |
| August 2025 | 77% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 84% | 31 |
| November 2025 | 77% | 30 |
| December 2025 | 87% | 31 |
| January 2026 | 86% | 22 |
| February 2026 | 69% | 26 |
| March 2026 | 87% | 30 |
| April 2026 | 90% | 30 |
| May 2026 | 68% | 31 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 352
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 358 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.