Flight number record
AS 576
Alaska Airlines · San Diego to Portland
- Route
- SAN → PDX
- Departs
- 11:04
- Flights
- 271
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 576, check with Alaska Airlines.
AS 576 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 50 minutes. That rests on 271 flights, with a median arrival 11 minutes early.
Set against the rest of the country, AS 576's record is 11 points better than the US average of 77.3%. That gap is worth roughly 110 fewer late arrivals for every thousand flights.
Key figures
On time
88.3%
Arrivals under 15 minutes late, of 266 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
1.48%
National rate is 1.89%
1 hour+ late
3.8%
National rate is 8.3%
These figures cover 271 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 576 flies
AS 576 flies SAN to PDX without a single fixed slot. Its most common scheduled departure was 11:04, used on 70 of 271 flights, with 10:55 (51 flights) and 10:54 (39 flights) next.
- Departs 11:0470 flights25.8%
- Departs 10:5551 flights18.8%
- Departs 10:5439 flights14.4%
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 11:04 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 576 runs 10 points better at 88.3%. 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 576 next to SAN to PDX
Every carrier on SAN to PDX combined arrived on time 82.5% of the time across 1,838 flights, so AS 576 is 6 points ahead of it. Alaska flew 1,591 flights on the same city pair under all its flight numbers, including this one, and those ran 85.5% 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 576thin sample | 271 | 88.3% | 52 min | 1.48% | A |
| All Alaska Airlines on SAN–PDX | 1,591 | 85.5% | 55 min | 1.01% | A |
| All carriers on SAN–PDX | 1,838 | 82.5% | 51 min | 0.87% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 576 quarter by quarter
Quarter by quarter AS 576 held fairly steady: 85.1% in Oct–Dec 2025, 92.3% in Jan–Mar 2026, 86.0% in Apr–Jun 2026 and 91.8% in Jul–Sep 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Oct–Dec 202567 flights85.1%
- Jan–Mar 202654 flights92.3%
- Apr–Jun 202688 flights86.0%
- Jul–Sep 202662 flights91.8%
Scale runs 75% to 100%.
By weekday, AS 576 ranged from 81.8% on Sunday to 92.5% on Monday. With about 39 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AS 576 runs when it is late
AS 576 often beats the schedule: 115 of 266 completed flights, 43%, arrived 15 minutes or more early. The 31 late arrivals split 14 under half an hour, 7 between 30 and 60 minutes, and 10 an hour or more.
- 15+ min early115 flights43.2%
- Within 15 min120 flights45.1%
- 15–29 min late14 flights5.3%
- 30–59 min late7 flights2.6%
- 1–2 hours late8 flights3.0%
- 2+ hours late2 flights0.8%
Scale runs 0% to 100%.
Share of 266 completed flights by arrival against schedule.
A late pushback is often recovered here: of 53 departures that left 15 minutes late or more, 29 still arrived on time. 7 flights left on time and still arrived late.
The worst days
Worst days for AS 576
The latest arrival of the period was on 29 October 2025, 3 hours 11 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 29 October 2025 | 3 hours 11 minutes | Late-arriving aircraft |
| 31 October 2025 | 2 hours 55 minutes | Carrier |
| 19 May 2026 | 1 hour 56 minutes | Carrier |
| 2 November 2025 | 1 hour 47 minutes | Late-arriving aircraft |
| 11 June 2026 | 1 hour 28 minutes | Carrier |
Delay causes
Why AS 576 runs late
Late-arriving aircraft accounts for 50% of the 1,595 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 39%Carrier
- 8%National Airspace System
- 3%Security
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,595 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 1,595 delay minutes reported on AS 576.
Cancellations sit at 1.48% against a national 1.89%, which is ordinary. Diversions add another 0.37%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.8% 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 933 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.
The same number turns up on two other city pairs in the data, including PSP to PDX (1) and SEA to PHX (1), but none flew often enough under AS 576 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SAN to PDX only.
One caution: this is a thin sample. 271 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 576
For a booking, AS 576 has one of the better records a US domestic flight can show: 88.3% on time and 1.48% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- SAN to PDX, every carrier and departure
- PDX to SAN, the return direction
- Alaska Airlines 1392 on the same route79.7%
- Alaska Airlines 1402 on the same route83.3%
- Alaska Airlines 399 on the same route92.8%
- San Diego International (SAN) 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.