Flight number record
AS 516
Alaska Airlines · Seattle to Fort Lauderdale
- Route
- SEA → FLL
- Departs
- 08:23
- Flights
- 337
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 337 flights, with a median arrival 11 minutes early.
Set against the rest of the country, AS 516's record is 6 points better than the US average of 77.3%. That gap is worth roughly 57 fewer late arrivals for every thousand flights.
Key figures
On time
83.0%
Arrivals under 15 minutes late, of 335 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.30%
National rate is 1.89%
1 hour+ late
3.6%
National rate is 8.3%
These figures cover 337 flights between September 2025 and August 2026. The median arrival is 11 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.
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Schedule
When AS 516 flies
AS 516 flies SEA to FLL without a single fixed slot. Its most common scheduled departure was 08:23, used on 83 of 337 flights, with 08:55 (52 flights) and 08:35 (35 flights) next.
- Departs 08:2383 flights24.6%
- Departs 08:5552 flights15.4%
- Departs 08:3535 flights10.4%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 08:23 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 516 runs level with that at 83.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 516 next to SEA to FLL
Every carrier on SEA to FLL combined arrived on time 78.6% of the time across 826 flights, so AS 516 is 4 points ahead of it. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 516thin sample | 337 | 83.0% | 46 min | 0.30% | B+ |
| All Alaska Airlines on SEA–FLL | 462 | 81.1% | 44 min | 0.22% | B+ |
| All carriers on SEA–FLL | 826 | 78.6% | 45 min | 0.73% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | 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 Jul–Sep 2026 at 77.4%, a swing of 18 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 202530 flights—
- Oct–Dec 202592 flights78.3%
- Jan–Mar 202690 flights80.9%
- Apr–Jun 202663 flights95.2%
- Jul–Sep 202662 flights77.4%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 516 did best on Wednesday at 93.8% on time and worst on Sunday at 76.6%. Each day rests on about 48 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 516 runs when it is late
AS 516 often beats the schedule: 134 of 335 completed flights, 40%, arrived 15 minutes or more early. Most of the lateness is short. 33 of the 57 late arrivals were under half an hour behind, and 12 reached an hour or more.
- 15+ min early134 flights40.0%
- Within 15 min144 flights43.0%
- 15–29 min late33 flights9.9%
- 30–59 min late12 flights3.6%
- 1–2 hours late8 flights2.4%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 335 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 20 still arrived on time. In the other direction, 27 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at FLL.
The worst days
Worst days for AS 516
The latest arrival of the period was on 15 January 2026, 4 hours 5 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 January 2026 | 4 hours 5 minutes | Carrier |
| 12 February 2026 | 3 hours 30 minutes | Late-arriving aircraft |
| 16 October 2025 | 2 hours 33 minutes | Carrier |
| 6 March 2026 | 2 hours 1 minute | Carrier |
| 9 November 2025 | 1 hour 59 minutes | Carrier |
Delay causes
Why AS 516 runs late
National Airspace System accounts for 44% of the 2,635 delay minutes carriers reported here, and the remaining four split what is left.
- 44%National Airspace System
- 44%Carrier
- 11%Late-arriving aircraft
- 0%Extreme weather
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,152 of the 2,635 delay minutes reported here. The split is drawn from 2,635 delay minutes reported on AS 516.
Cancellations are rare at 0.30%, below the national 1.89% 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 3.6% land an hour or more behind schedule, against 8.3% 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 83.0% on time with 0.30% cancelled over 337 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to FLL, every carrier and departure
- FLL to SEA, the return direction
- Delta Air Lines 338 on the same route75.3%
- Seattle-Tacoma International (SEA) delay statistics
- Fort Lauderdale-Hollywood International (FLL) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.