Flight number record
AS 552
Alaska Airlines · Las Vegas to Seattle
- Route
- LAS → SEA
- Departs
- 17:46
- Flights
- 281
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AS 552, check with Alaska Airlines.
AS 552 lands a B, 5 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 an hour on average. That is a workable record, not a spotless one. That rests on 281 flights, with a median arrival 7 minutes early.
Set against the rest of the country, AS 552's record is 5 points better than the US average of 77.6%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.
Key figures
On time
82.4%
Arrivals under 15 minutes late, of 278 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
1.07%
National rate is 1.81%
1 hour+ late
4.7%
National rate is 8.1%
These figures cover 281 flights between July 2025 and June 2026. The median arrival is 7 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 552 flies
AS 552 flies LAS to SEA without a single fixed slot. Its most common scheduled departure was 17:46, used on 64 of 281 flights, with 17:42 (59 flights) and 17:44 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:4664 flights22.8%
- Departs 17:4259 flights21.0%
- Departs 17:4439 flights13.9%
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 17:46 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 552 runs 14 points better at 82.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
AS 552 next to LAS to SEA
Every carrier on LAS to SEA combined arrived on time 82.3% of the time across 5,649 flights, so AS 552 is about level with it. Alaska flew 2,638 flights on the same city pair under all its flight numbers, including this one, and those ran 82.8% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 552thin sample | 281 | 82.4% | 56 min | 1.07% | B |
| All Alaska Airlines on LAS–SEA | 2,638 | 82.8% | 64 min | 1.25% | B |
| All carriers on LAS–SEA | 5,649 | 82.3% | 63 min | 0.94% | B+ |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | B |
Across the year
AS 552 quarter by quarter
AS 552 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.8% on time and its weakest Oct–Dec 2025 at 73.9%, a swing of 15 points on roughly 70 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 202540 flights87.5%
- Oct–Dec 202591 flights73.9%
- Jan–Mar 202680 flights88.8%
- Apr–Jun 202670 flights82.9%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 552 did best on Tuesday at 92.7% on time and worst on Sunday at 73.0%. Each day rests on about 40 flights, so a gap of 20 points is worth noticing but could still narrow in another year.
Delay causes
Why AS 552 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 65% of the 2,722 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.
- 65%Late-arriving aircraft
- 20%National Airspace System
- 11%Carrier
- 4%Extreme weather
65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,722 reported delay minutes here, that single category outweighs weather by 17 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 2,722 delay minutes reported on AS 552.
Cancellations sit at 1.07% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.7% 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.
The 867 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on one other city pair in the data, including BUR to HNL (20), but none flew often enough under AS 552 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAS to SEA only.
One caution: this is a thin sample. 281 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 552
For a booking, read AS 552 as 82.4% on time with 1.07% cancelled over 281 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAS to SEA, every carrier and departure
- SEA to LAS, the return direction
- Delta Air Lines 2844 on the same route95.9%
- Alaska Airlines 629 on the same route88.0%
- Alaska Airlines 676 on the same route74.9%
- Alaska Airlines 479 on the same route81.7%
- Delta Air Lines 2880 on the same route83.4%
- Alaska Airlines 701 on the same route95.8%
- Harry Reid International (LAS) delay statistics
- Seattle-Tacoma International (SEA) 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
- Why the first flight of the morning is statistically safest
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.