Flight OddsDelta Air Lines · Los Angeles, CA to Dallas/Fort Worth, TX · 357 flights observed, 2025-07-01 to 2026-06-27 · 1,235 mi
DL521 covers more than one route in the data window — the stats below are for LAX → DFW, the one it has flown most recently. The others are linked under “Other routes”.
How often is DL521 on time?
Across 357 flights on LAX → DFW from 2025-07-01 to 2026-06-27, DL521 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +22 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 304 | 87% |
| 16-30 min | 16 | 5% |
| 31-60 min | 14 | 4% |
| 61-120 min | 6 | 2% |
| 2+ hrs | 8 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 84% | +11 min |
| 2025-08 | 29 | 79% | +10 min |
| 2025-09 | 30 | 90% | -8 min |
| 2025-10 | 31 | 97% | -9 min |
| 2025-11 | 27 | 81% | +10 min |
| 2025-12 | 31 | 87% | -3 min |
| 2026-01 | 30 | 87% | +3 min |
| 2026-02 | 24 | 92% | +0 min |
| 2026-03 | 29 | 86% | +0 min |
| 2026-04 | 30 | 93% | -7 min |
| 2026-05 | 29 | 93% | -6 min |
| 2026-06 | 27 | 78% | +44 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 51 | 78% |
| Tue | 51 | 92% |
| Wed | 50 | 92% |
| Thu | 51 | 84% |
| Fri | 50 | 92% |
| Sat | 46 | 78% |
| Sun | 49 | 94% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…