Flight profile · Alaska Airlines
AS508
Seattle (SEA) to Cincinnati / Covington (CVG) · scheduled 10:00 AM – 5:40 PM
How AS508 performs
1,052 operations, 2023-07-01 to 2026-06-30.
AS508 arrived on time 80.3% of the time, against 83.8% for all SEA → CVG flights — this specific departure is 3.5 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 1.6 points better.
Source: US DOT Bureau of Transportation Statistics · 1,052 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS508 | 80.3% | 1.33% | -6 min | 3.6% | 1,052 |
| Alaska Airlines on SEA → CVG | 78.7% | 1.23% | -5 min | 4.2% | 1,142 |
| All SEA → CVG flights | 83.8% | 1.03% | -9 min | 3.9% | 2,232 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS508 run worse on particular days?
Wednesday is historically the most reliable day and Sunday the least, a gap of 12.9 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 AS508 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.
| Route | Operated | Flights | On time |
|---|---|---|---|
| CVG→SEA Cincinnati / Covington to Seattle | 2023-07-01 – 2026-06-30 | 377 | 70.9% |
Because the same number has served different journeys, the statistics above describe only the route AS508 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 1,052 records of AS508 operating SEA → CVG, 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.