Flight OddsAS378 SEA → BWI
Alaska Airlines · Seattle, WA to Baltimore, MD · 337 flights observed, 2025-07-01 to 2026-06-30 · 2,335 mi
AS378 covers more than one route in the data window — the stats below are for SEA → BWI, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-9 min
90th percentile
+27 min
Cancellation rate
1%
How often is AS378 on time?
Across 337 flights on SEA → BWI from 2025-07-01 to 2026-06-30, AS378 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +27 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 | 276 | 83% |
| 16-30 min | 27 | 8% |
| 31-60 min | 18 | 5% |
| 61-120 min | 6 | 2% |
| 2+ hrs | 5 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 66% | +10 min |
| 2025-08 | 31 | 68% | +10 min |
| 2025-09 | 30 | 77% | +9 min |
| 2025-10 | 31 | 90% | -11 min |
| 2025-11 | 30 | 87% | +0 min |
| 2025-12 | 31 | 84% | -9 min |
| 2026-01 | 29 | 83% | +1 min |
| 2026-02 | 27 | 93% | -11 min |
| 2026-03 | 31 | 87% | -8 min |
| 2026-04 | 30 | 93% | -11 min |
| 2026-05 | 12 | 100% | -22 min |
| 2026-06 | 21 | 81% | -1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 46 | 78% |
| Tue | 48 | 83% |
| Wed | 48 | 81% |
| Thu | 48 | 79% |
| Fri | 48 | 83% |
| Sat | 48 | 90% |
| Sun | 46 | 87% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…