Flight number record
AS 526
Alaska Airlines · Portland to San Francisco
- Route
- PDX → SFO
- Departs
- 07:00
- Flights
- 305
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 526, check with Alaska Airlines.
AS 526 earns a D+, which is as low as this site's scale goes for a reason. Only 57.0% of flights arrive inside the 15-minute window, 20 points worse than the national rate of 77.3%. Late arrivals average about 55 minutes. Treat any tight connection here as a coin flip. That rests on 305 flights, with a median arrival 9 minutes late.
The national on-time rate over the same period is 77.3%, so AS 526 runs 20 points behind the country as a whole. Across a thousand flights that is about 203 extra late arrivals.
Key figures
On time
57.0%
Arrivals under 15 minutes late, of 305 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
6.6%
National rate is 8.3%
These figures cover 305 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Schedule
When AS 526 flies
AS 526 flies PDX to SFO without a single fixed slot. Its most common scheduled departure was 07:00, used on 76 of 305 flights, with 07:05 (64 flights) and 07:19 (60 flights) next.
- Departs 07:0076 flights24.9%
- Departs 07:0564 flights21.0%
- Departs 07:1960 flights19.7%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 526 runs 32 points worse at 57.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 526 next to PDX to SFO
Every carrier on PDX to SFO combined arrived on time 66.8% of the time across 3,495 flights, so AS 526 is 10 points behind it. Alaska flew 1,403 flights on the same city pair under all its flight numbers, including this one, and those ran 67.4% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 23 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 526thin sample | 305 | 57.0% | 54 min | 0.00% | D+ |
| All Alaska Airlines on PDX–SFO | 1,403 | 67.4% | 52 min | 0.43% | C+ |
| All carriers on PDX–SFO | 3,495 | 66.8% | 57 min | 0.37% | C+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 526 quarter by quarter
AS 526 did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.4% on time and its weakest Apr–Jun 2026 at 33.0%, a swing of 52 points on roughly 76 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 202563 flights73.0%
- Jan–Mar 202689 flights85.4%
- Apr–Jun 202691 flights33.0%
- Jul–Sep 202662 flights35.5%
Scale runs 25% to 90%.
By weekday, AS 526 did best on Tuesday at 65.9% on time and worst on Thursday at 42.9%. Each day rests on about 44 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 526 runs when it is late
The 131 late arrivals split 31 under half an hour, 80 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early32 flights10.5%
- Within 15 min142 flights46.6%
- 15–29 min late31 flights10.2%
- 30–59 min late80 flights26.2%
- 1–2 hours late11 flights3.6%
- 2+ hours late9 flights3.0%
Scale runs 0% to 100%.
Share of 305 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 114 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 24 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for AS 526
The latest arrival of the period was on 23 May 2026, 5 hours 42 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 23 May 2026 | 5 hours 42 minutes | Carrier |
| 8 November 2025 | 4 hours 31 minutes | National Airspace System |
| 28 May 2026 | 4 hours 6 minutes | National Airspace System |
| 7 August 2026 | 3 hours 37 minutes | National Airspace System |
| 6 December 2025 | 3 hours 36 minutes | Carrier |
Delay causes
Why AS 526 runs late
National Airspace System accounts for 81% of the 7,083 delay minutes carriers reported here, and the remaining four split what is left.
- 81%National Airspace System
- 18%Carrier
- 0%Late-arriving aircraft
- 0%Extreme weather
81% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 5,735 minutes out of 7,083, against a national NAS share of 21%. The split is drawn from 7,083 delay minutes reported on AS 526.
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
6.6% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, which a normal layover absorbs.
The 550 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 305 flights under AS 526 in the data flew PDX to SFO. 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. 305 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 526
For a booking, AS 526 is one of the weaker ways to fly PDX to SFO: 10 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- PDX to SFO, every carrier and departure
- SFO to PDX, the return direction
- United Airlines 2615 on the same route52.3%
- Portland International (PDX) delay statistics
- San Francisco International (SFO) 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
- Worst months to fly in the US, ranked by the data
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.