Flight number record
AS 1355
Alaska Airlines · Los Angeles to Portland
- Route
- LAX → PDX
- Departs
- 11:23
- Flights
- 290
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 1355, check with Alaska Airlines.
AS 1355 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 about 45 minutes on average. That rests on 290 flights, with a median arrival 8 minutes early.
Set against the rest of the country, AS 1355's record is 6 points better than the US average of 77.3%. That gap is worth roughly 56 fewer late arrivals for every thousand flights.
Key figures
On time
82.9%
Arrivals under 15 minutes late, of 287 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
1.03%
National rate is 1.89%
1 hour+ late
4.2%
National rate is 8.3%
These figures cover 290 flights between September 2025 and August 2026. The median arrival is 8 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 1355 flies
AS 1355 flies LAX to PDX without a single fixed slot. Its most common scheduled departure was 11:23, used on 60 of 290 flights, with 11:03 (55 flights) and 11:06 (54 flights) next.
- Departs 11:2360 flights20.7%
- Departs 11:0355 flights19.0%
- Departs 11:0654 flights18.6%
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 11:23 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 1355 runs 5 points better at 82.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 1355 next to LAX to PDX
Every carrier on LAX to PDX combined arrived on time 86.8% of the time across 4,289 flights, so AS 1355 is 4 points behind it. Alaska flew 1,818 flights on the same city pair under all its flight numbers, including this one, and those ran 89.8% on time. 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 1355thin sample | 290 | 82.9% | 46 min | 1.03% | B |
| All Alaska Airlines on LAX–PDX | 1,818 | 89.8% | 51 min | 0.50% | A+ |
| All carriers on LAX–PDX | 4,289 | 86.8% | 68 min | 0.61% | A+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 1355 quarter by quarter
AS 1355 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.5% on time and its weakest Jul–Sep 2026 at 74.5%, a swing of 13 points on roughly 73 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.
- Oct–Dec 202560 flights80.0%
- Jan–Mar 202690 flights87.5%
- Apr–Jun 202685 flights85.7%
- Jul–Sep 202655 flights74.5%
Scale runs 65% to 95%.
By weekday, AS 1355 did best on Sunday at 95.2% on time and worst on Thursday at 79.1%. Each day rests on about 41 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 1355 runs when it is late
AS 1355 often beats the schedule: 89 of 287 completed flights, 31%, arrived 15 minutes or more early. The 49 late arrivals split 24 under half an hour, 13 between 30 and 60 minutes, and 12 an hour or more.
- 15+ min early89 flights31.0%
- Within 15 min149 flights51.9%
- 15–29 min late24 flights8.4%
- 30–59 min late13 flights4.5%
- 1–2 hours late9 flights3.1%
- 2+ hours late3 flights1.0%
Scale runs 0% to 100%.
Share of 287 completed flights by arrival against schedule.
11 of 50 late departures made up the time and arrived on time, 22% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for AS 1355
The latest arrival of the period was on 10 April 2026, 3 hours 49 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 April 2026 | 3 hours 49 minutes | Late-arriving aircraft |
| 28 October 2025 | 3 hours | Carrier |
| 11 May 2026 | 2 hours 14 minutes | Late-arriving aircraft |
| 3 February 2026 | 1 hour 56 minutes | Carrier |
| 13 December 2025 | 1 hour 50 minutes | Late-arriving aircraft |
Delay causes
Why AS 1355 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 2,237 reported delay minutes.
- 35%Late-arriving aircraft
- 34%National Airspace System
- 31%Carrier
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,237 reported delay minutes here, that single category outweighs weather by 35 to one. The split is drawn from 2,237 delay minutes reported on AS 1355.
Cancellations sit at 1.03% against a national 1.89%, 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 4.2% 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.
The 833 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.
Every one of the 290 flights under AS 1355 in the data flew LAX to PDX. 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. 290 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 1355
For a booking, read AS 1355 as 82.9% on time with 1.03% cancelled over 290 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAX to PDX, every carrier and departure
- PDX to LAX, the return direction
- Delta Air Lines 2766 on the same route88.7%
- Delta Air Lines 2975 on the same route89.5%
- Alaska Airlines 1315 on the same route91.7%
- Delta Air Lines 2551 on the same route87.1%
- Alaska Airlines 1397 on the same route88.5%
- Alaska Airlines 668 on the same route94.5%
- Los Angeles International (LAX) delay statistics
- Portland International (PDX) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.