Flight OddsDelta Air Lines · Austin, TX to Mission/McAllen/Edinburg, TX · 269 flights observed, 2025-07-01 to 2026-06-27 · 279 mi
DL4121 covers more than one route in the data window — the stats below are for AUS → MFE, the one it has flown most recently. The others are linked under “Other routes”.
How often is DL4121 on time?
Across 269 flights on AUS → MFE from 2025-07-01 to 2026-06-27, DL4121 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -3 min, and the worst 10% of flights arrived +39 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 215 | 80% |
| 16-30 min | 22 | 8% |
| 31-60 min | 10 | 4% |
| 61-120 min | 9 | 3% |
| 2+ hrs | 12 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 65% | +16 min |
| 2025-08 | 31 | 77% | +23 min |
| 2025-09 | 30 | 87% | +6 min |
| 2025-10 | 30 | 87% | +15 min |
| 2025-11 | 28 | 89% | +2 min |
| 2025-12 | 19 | 79% | +10 min |
| 2026-01 | 26 | 69% | +5 min |
| 2026-02 | 14 | 93% | -3 min |
| 2026-03 | 1 | 100% | -13 min |
| 2026-04 | 18 | 83% | +6 min |
| 2026-05 | 31 | 77% | +2 min |
| 2026-06 | 9 | 89% | +14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 38 | 82% |
| Tue | 39 | 69% |
| Wed | 39 | 82% |
| Thu | 37 | 81% |
| Fri | 36 | 83% |
| Sat | 44 | 86% |
| Sun | 35 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…