Flight number record
AS 1301
Alaska Airlines · Los Angeles to Seattle
- Route
- LAX → SEA
- Departs
- 17:15
- Flights
- 311
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AS 1301, check with Alaska Airlines.
AS 1301 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 311 flights, with a median arrival 12 minutes early.
Set against the rest of the country, AS 1301's record is 9 points better than the US average of 77.6%. That gap is worth roughly 92 fewer late arrivals for every thousand flights.
Key figures
On time
86.8%
Arrivals under 15 minutes late, of 311 completed flights
Avg delay
43 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
1.6%
National rate is 8.1%
These figures cover 311 flights between July 2025 and June 2026. The median arrival is 12 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 1301 flies
AS 1301 flies LAX to SEA without a single fixed slot. Its most common scheduled departure was 17:15, used on 71 of 311 flights, with 17:36 (45 flights) and 17:44 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 17:1571 flights22.8%
- Departs 17:3645 flights14.5%
- Departs 17:4434 flights10.9%
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 17:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 1301 runs 19 points better at 86.8%. 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 1301 next to LAX to SEA
Every carrier on LAX to SEA combined arrived on time 85.4% of the time across 7,424 flights, so AS 1301 is about level with it. Alaska flew 3,279 flights on the same city pair under all its flight numbers, including this one, and those ran 85.2% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 1301thin sample | 311 | 86.8% | 43 min | 0.00% | A+ |
| All Alaska Airlines on LAX–SEA | 3,279 | 85.2% | 49 min | 1.10% | A |
| All carriers on LAX–SEA | 7,424 | 85.4% | 64 min | 0.98% | A+ |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | B |
Across the year
AS 1301 quarter by quarter
AS 1301 did not run the same all year. Its best quarter was Oct–Dec 2025 at 94.9% on time and its weakest Apr–Jun 2026 at 83.0%, a swing of 12 points on roughly 78 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 202591 flights84.6%
- Oct–Dec 202578 flights94.9%
- Jan–Mar 202654 flights85.2%
- Apr–Jun 202688 flights83.0%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 1301 did best on Saturday at 95.2% on time and worst on Friday at 76.1%. Each day rests on about 44 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Delay causes
Why AS 1301 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,743 reported delay minutes.
- 37%Late-arriving aircraft
- 35%Carrier
- 21%National Airspace System
- 7%Extreme weather
- 0%Security
37% 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 1,743 reported delay minutes here, that single category outweighs weather by 5 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 1,743 delay minutes reported on AS 1301.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are 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 1.6% 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 954 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.
Every one of the 311 flights under AS 1301 in the data flew LAX to SEA. 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. 311 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 1301
For a booking, AS 1301 has one of the better records a US domestic flight can show: 86.8% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to SEA, every carrier and departure
- SEA to LAX, the return direction
- Delta Air Lines 2606 on the same route84.8%
- Delta Air Lines 2980 on the same route91.9%
- Delta Air Lines 2640 on the same route82.4%
- Delta Air Lines 1714 on the same route92.5%
- Delta Air Lines 1045 on the same route88.8%
- Delta Air Lines 1551 on the same route82.0%
- Los Angeles International (LAX) 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.