Flight number record

AS 516

Alaska Airlines · Seattle to Fort Lauderdale

Route: SEA → FLL
Departs: 07:55
Flights: 337
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 516, check with Alaska Airlines.

AS 516 lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 50 minutes on average. That is a workable record, not a spotless one. That rests on 337 flights, with a median arrival 10 minutes early.

Set against the rest of the country, AS 516's record is 6 points better than the US average of 77.6%. That gap is worth roughly 58 fewer late arrivals for every thousand flights.

On time

83.4%

Arrivals under 15 minutes late, of 332 completed flights

Avg delay

49 min

Across delayed arrivals only, not all flights

Cancelled

0.59%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 337 flights between July 2025 and June 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When AS 516 flies

AS 516 flies SEA to FLL without a single fixed slot. Its most common scheduled departure was 07:55, used on 74 of 337 flights, with 08:55 (52 flights) and 08:37 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:5574 flights22.0%
Departs 08:5552 flights15.4%
Departs 08:3745 flights13.4%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 07:55 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 516 runs 6 points worse at 83.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

AS 516 next to SEA to FLL

Every carrier on SEA to FLL combined arrived on time 78.1% of the time across 826 flights, so AS 516 is 5 points ahead of it. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 4 points.

AS 516 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 516thin sample	337	83.4%	49 min	0.59%	B+
All Alaska Airlines on SEA–FLL	462	81.4%	46 min	0.43%	B+
All carriers on SEA–FLL	826	78.1%	50 min	0.97%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 516 quarter by quarter

AS 516 did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.2% on time and its weakest Oct–Dec 2025 at 78.3%, a swing of 17 points on roughly 84 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights83.0%
Oct–Dec 202592 flights78.3%
Jan–Mar 202690 flights80.9%
Apr–Jun 202663 flights95.2%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 516 did best on Wednesday at 95.7% on time and worst on Saturday at 75.0%. Each day rests on about 48 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 516 runs late

One category carries most of the weight here. National Airspace System accounts for 43% of the 2,694 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
43%
Carrier
42%
Late-arriving aircraft
14%
Extreme weather
0%

The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,142 of the 2,694 delay minutes reported here. The split is drawn from 2,694 delay minutes reported on AS 516.

Cancellations are rare at 0.59%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.9% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 2,717 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

Every one of the 337 flights under AS 516 in the data flew SEA to FLL. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 337 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking AS 516

For a booking, read AS 516 as 83.4% on time with 0.59% cancelled over 337 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures