Flight profile · Alaska Airlines
AS517
Fort Lauderdale (FLL) to Seattle (SEA) · scheduled 10:00 AM – 10:00 PM
How AS517 performs
1,016 operations, 2023-07-01 to 2026-06-30.
AS517 arrived on time 68.7% of the time, against 72.5% for all FLL → SEA flights — this specific departure is 3.8 percentage points worse than the route as a whole. Against Alaska Airlines’s own flights on this route it is 2.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,016 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS517 | 68.7% | 2.17% | 1 min | 8.1% | 1,016 |
| Alaska Airlines on FLL → SEA | 70.7% | 2.50% | 0 min | 7.0% | 1,560 |
| All FLL → SEA flights | 72.5% | 1.92% | -2 min | 7.6% | 2,652 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does AS517 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 25.1 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 AS517 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 |
|---|---|---|---|
| SEA→FLL Seattle to Fort Lauderdale | 2026-05-13 – 2026-06-09 | 28 | — |
Because the same number has served different journeys, the statistics above describe only the route AS517 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 1,016 records of AS517 operating FLL → 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.