Flight OddsAS4 SEA → DCA
Alaska Airlines · Seattle, WA to Washington, DC · 365 flights observed, 2025-07-01 to 2026-06-30 · 2,329 mi
On-time arrival
86%
Median delay
-14 min
90th percentile
+26 min
Cancellation rate
1%
How often is AS4 on time?
Across 365 flights on SEA → DCA from 2025-07-01 to 2026-06-30, AS4 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +26 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 305 | 86% |
| 16-30 min | 17 | 5% |
| 31-60 min | 17 | 5% |
| 61-120 min | 10 | 3% |
| 2+ hrs | 5 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 25 | 84% | +10 min |
| 2025-08 | 29 | 93% | +0 min |
| 2025-09 | 29 | 72% | +10 min |
| 2025-10 | 31 | 81% | -2 min |
| 2025-11 | 30 | 83% | -1 min |
| 2025-12 | 31 | 90% | -17 min |
| 2026-01 | 30 | 87% | -4 min |
| 2026-02 | 28 | 75% | -10 min |
| 2026-03 | 30 | 87% | -21 min |
| 2026-04 | 30 | 90% | -18 min |
| 2026-05 | 31 | 97% | -24 min |
| 2026-06 | 30 | 93% | -23 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 51 | 78% |
| Tue | 51 | 90% |
| Wed | 51 | 96% |
| Thu | 51 | 80% |
| Fri | 50 | 86% |
| Sat | 51 | 92% |
| Sun | 49 | 80% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…