Flight OddsDL831 SEA → AUS
Delta Air Lines · Seattle, WA to Austin, TX · 353 flights observed, 2025-07-01 to 2026-06-30 · 1,770 mi
DL831 covers more than one route in the data window — the stats below are for SEA → AUS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
80%
Median delay
-8 min
90th percentile
+36 min
Cancellation rate
2%
How often is DL831 on time?
Across 353 flights on SEA → AUS from 2025-07-01 to 2026-06-30, DL831 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +36 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 | 279 | 80% |
| 16-30 min | 28 | 8% |
| 31-60 min | 18 | 5% |
| 61-120 min | 12 | 3% |
| 2+ hrs | 10 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 74% | +3 min |
| 2025-08 | 31 | 74% | +7 min |
| 2025-09 | 29 | 90% | +3 min |
| 2025-10 | 31 | 81% | +2 min |
| 2025-11 | 27 | 67% | +11 min |
| 2025-12 | 29 | 79% | +3 min |
| 2026-01 | 29 | 93% | -18 min |
| 2026-02 | 28 | 89% | -12 min |
| 2026-03 | 27 | 81% | +6 min |
| 2026-04 | 26 | 96% | -4 min |
| 2026-05 | 30 | 73% | +16 min |
| 2026-06 | 29 | 69% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 52 | 75% |
| Tue | 53 | 94% |
| Wed | 52 | 88% |
| Thu | 51 | 80% |
| Fri | 52 | 67% |
| Sat | 38 | 74% |
| Sun | 49 | 82% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…