Flight number record
AS 1397
Alaska Airlines · Los Angeles to Portland
- Route
- LAX → PDX
- Departs
- 18:27
- Flights
- 331
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 1397, check with Alaska Airlines.
AS 1397 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 331 flights, with a median arrival 10 minutes early.
Set against the rest of the country, AS 1397's record is 11 points better than the US average of 77.3%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.
Key figures
On time
88.5%
Arrivals under 15 minutes late, of 331 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
2.7%
National rate is 8.3%
These figures cover 331 flights between September 2025 and August 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.
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Schedule
When AS 1397 flies
AS 1397 flies LAX to PDX without a single fixed slot. Its most common scheduled departure was 18:27, used on 49 of 331 flights, with 18:00 (36 flights) and 18:19 (34 flights) next.
- Departs 18:2749 flights14.8%
- Departs 18:0036 flights10.9%
- Departs 18:1934 flights10.3%
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 18:27 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and AS 1397 runs 21 points better at 88.5%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
AS 1397 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 1397 is 2 points ahead of 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 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 1397thin sample | 331 | 88.5% | 53 min | 0.00% | A+ |
| 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 1397 quarter by quarter
Quarter by quarter AS 1397 held fairly steady: 90.0% in Jul–Sep 2025, 84.4% in Oct–Dec 2025, 87.5% in Jan–Mar 2026, 93.5% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202590 flights84.4%
- Jan–Mar 202688 flights87.5%
- Apr–Jun 202662 flights93.5%
- Jul–Sep 202661 flights90.2%
Scale runs 75% to 100%.
By weekday, AS 1397 did best on Wednesday at 95.8% on time and worst on Friday at 72.3%. Each day rests on about 47 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 1397 runs when it is late
AS 1397 often beats the schedule: 121 of 331 completed flights, 37%, arrived 15 minutes or more early. The 38 late arrivals split 13 under half an hour, 16 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early121 flights36.6%
- Within 15 min172 flights52.0%
- 15–29 min late13 flights3.9%
- 30–59 min late16 flights4.8%
- 1–2 hours late5 flights1.5%
- 2+ hours late4 flights1.2%
Scale runs 0% to 100%.
Share of 331 completed flights by arrival against schedule.
12 of 47 late departures made up the time and arrived on time, 26% of them. Only 3 left on time and still arrived late.
The worst days
Worst days for AS 1397
The latest arrival of the period was on 11 August 2026, 4 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 August 2026 | 4 hours 42 minutes | Carrier |
| 23 October 2025 | 3 hours 3 minutes | Carrier |
| 30 June 2026 | 2 hours 29 minutes | Carrier |
| 28 December 2025 | 2 hours 20 minutes | Late-arriving aircraft |
| 19 February 2026 | 1 hour 46 minutes | Late-arriving aircraft |
Delay causes
Why AS 1397 runs late
Late-arriving aircraft accounts for 54% of the 2,015 delay minutes carriers reported here, and the remaining four split what is left.
- 54%Late-arriving aircraft
- 36%Carrier
- 10%National Airspace System
54% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,015 reported delay minutes here, that single category outweighs weather by 54 to one. The split is drawn from 2,015 delay minutes reported on AS 1397.
Cancellations are rare at 0.00%, below the national 1.89% 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 2.7% 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 331 flights under AS 1397 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. 331 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 1397
For a booking, AS 1397 has one of the better records a US domestic flight can show: 88.5% 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 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 668 on the same route94.5%
- Delta Air Lines 2457 on the same route80.9%
- 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.