Flight OddsDelta Air Lines · Raleigh/Durham, NC to Austin, TX · 176 flights observed, 2026-01-05 to 2026-06-30 · 1,162 mi
DL4921 covers more than one route in the data window — the stats below are for RDU → AUS, the one it has flown most recently. The others are linked under “Other routes”.
How often is DL4921 on time?
Across 176 flights on RDU → AUS from 2026-01-05 to 2026-06-30, DL4921 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +17 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 | 154 | 90% |
| 16-30 min | 7 | 4% |
| 31-60 min | 2 | 1% |
| 61-120 min | 5 | 3% |
| 2+ hrs | 4 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 25 | 92% | -11 min |
| 2026-02 | 27 | 89% | -9 min |
| 2026-03 | 31 | 97% | -25 min |
| 2026-04 | 29 | 97% | -19 min |
| 2026-05 | 30 | 80% | +2 min |
| 2026-06 | 30 | 83% | +19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 26 | 81% |
| Tue | 26 | 96% |
| Wed | 25 | 92% |
| Thu | 24 | 96% |
| Fri | 24 | 79% |
| Sat | 24 | 96% |
| Sun | 23 | 87% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…