Flight profile · Alaska Airlines
AS305
Miami (MIA) to Seattle (SEA) · scheduled 5:35 PM – 10:00 PM
How AS305 performs
988 operations, 2023-07-01 to 2026-06-30.
AS305 arrived on time 71.6% of the time, against 67.9% for all MIA → SEA flights — this specific departure is 3.7 percentage points better than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 988 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS305 | 71.6% | 2.23% | -3 min | 9.4% | 988 |
| Alaska Airlines on MIA → SEA | 71.2% | 2.09% | -3 min | 9.4% | 1,151 |
| All MIA → SEA flights | 67.9% | 1.31% | 0 min | 11.0% | 2,901 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS305 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 14.0 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes AS305 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
Because the same number has served different journeys, the statistics above describe only the route AS305 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 988 records of AS305 operating MIA → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.