Flight OddsAS377 ATL → SEA
Alaska Airlines · Atlanta, GA to Seattle, WA · 315 flights observed, 2025-07-01 to 2026-06-30 · 2,182 mi
AS377 covers more than one route in the data window — the stats below are for ATL → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-9 min
90th percentile
+27 min
Cancellation rate
0%
How often is AS377 on time?
Across 315 flights on ATL → SEA from 2025-07-01 to 2026-06-30, AS377 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +27 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 | 269 | 86% |
| 16-30 min | 17 | 5% |
| 31-60 min | 14 | 4% |
| 61-120 min | 8 | 3% |
| 2+ hrs | 6 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 94% | -16 min |
| 2025-08 | 28 | 89% | -2 min |
| 2025-09 | 21 | 95% | +0 min |
| 2025-10 | 21 | 86% | +13 min |
| 2025-11 | 10 | 90% | -5 min |
| 2025-12 | 23 | 74% | +7 min |
| 2026-01 | 31 | 74% | +9 min |
| 2026-02 | 28 | 79% | -3 min |
| 2026-03 | 31 | 74% | +9 min |
| 2026-04 | 29 | 97% | +10 min |
| 2026-05 | 31 | 90% | -13 min |
| 2026-06 | 30 | 90% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 47 | 81% |
| Tue | 40 | 90% |
| Wed | 35 | 97% |
| Thu | 48 | 85% |
| Fri | 49 | 82% |
| Sat | 49 | 88% |
| Sun | 46 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…