Flight number record
AS 511
Alaska Airlines · Phoenix to Portland
- Route
- PHX → PDX
- Departs
- 07:00
- Flights
- 299
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 511, check with Alaska Airlines.
AS 511 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 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 299 flights, with a median arrival 7 minutes early.
Set against the rest of the country, AS 511's record is 10 points better than the US average of 77.3%. That gap is worth roughly 100 fewer late arrivals for every thousand flights.
Key figures
On time
87.3%
Arrivals under 15 minutes late, of 299 completed flights
Avg delay
40 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.3%
National rate is 8.3%
These figures cover 299 flights between September 2025 and August 2026. The median arrival is 7 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 511 flies
AS 511 flies PHX to PDX without a single fixed slot. Its most common scheduled departure was 07:00, used on 153 of 299 flights, with 07:40 (60 flights) next.
- Departs 07:00153 flights51.2%
- Departs 07:4060 flights20.1%
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 511 runs 2 points worse at 87.3%. 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 511 next to PHX to PDX
Every carrier on PHX to PDX combined arrived on time 77.4% of the time across 3,768 flights, so AS 511 is 10 points ahead of it. Alaska flew 1,437 flights on the same city pair under all its flight numbers, including this one, and those ran 85.8% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 511thin sample | 299 | 87.3% | 40 min | 0.00% | A+ |
| All Alaska Airlines on PHX–PDX | 1,437 | 85.8% | 53 min | 0.35% | A+ |
| All carriers on PHX–PDX | 3,768 | 77.4% | 54 min | 0.45% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 511 quarter by quarter
AS 511 did not run the same all year. Its best quarter was Apr–Jun 2026 at 95.9% on time and its weakest Oct–Dec 2025 at 81.3%, a swing of 15 points on roughly 60 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 202530 flights93.3%
- Oct–Dec 202591 flights81.3%
- Jan–Mar 202667 flights89.6%
- Apr–Jun 202649 flights95.9%
- Jul–Sep 202662 flights83.9%
Scale runs 75% to 100%.
By weekday, AS 511 did best on Thursday at 97.7% on time and worst on Friday at 76.7%. Each day rests on about 43 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 511 runs when it is late
Most of the lateness is short. 24 of the 38 late arrivals were under half an hour behind, and 4 reached an hour or more.
- 15+ min early59 flights19.7%
- Within 15 min202 flights67.6%
- 15–29 min late24 flights8.0%
- 30–59 min late10 flights3.3%
- 1–2 hours late3 flights1.0%
- 2+ hours late1 flights0.3%
Scale runs 0% to 100%.
Share of 299 completed flights by arrival against schedule.
9 of 39 late departures made up the time and arrived on time, 23% of them. 8 flights left on time and still arrived late.
The worst days
Worst days for AS 511
The latest arrival of the period was on 1 February 2026, 5 hours 57 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 a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 1 February 2026 | 5 hours 57 minutes | Carrier |
| 31 December 2025 | 1 hour 19 minutes | National Airspace System |
| 24 October 2025 | 1 hour 13 minutes | Late-arriving aircraft |
| 27 January 2026 | 1 hour 9 minutes | Late-arriving aircraft |
| 24 August 2026 | 56 minutes | Late-arriving aircraft |
Delay causes
Why AS 511 runs late
Carrier accounts for 46% of the 1,526 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 25%National Airspace System
- 24%Late-arriving aircraft
- 4%Extreme weather
- 1%Security
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 705 of the 1,526 delay minutes reported here. The split is drawn from 1,526 delay minutes reported on AS 511.
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 1.3% 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 1,010 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 four other city pairs in the data, including SEA to SFO (6), PSP to SFO (4) and SFO to PSP (4), but none flew often enough under AS 511 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PHX to PDX only.
One caution: this is a thin sample. 299 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 511
For a booking, AS 511 has one of the better records a US domestic flight can show: 87.3% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- PHX to PDX, every carrier and departure
- PDX to PHX, the return direction
- Alaska Airlines 662 on the same route82.5%
- Alaska Airlines 742 on the same route87.1%
- Phoenix Sky Harbor International (PHX) 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
- 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.