Flight number record
AS 511
Alaska Airlines · Phoenix to Portland
- Route
- PHX → PDX
- Departs
- 07:00
- Flights
- 299
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 299 flights, with a median arrival 8 minutes early.
Set against the rest of the country, AS 511's record is 11 points better than the US average of 77.6%. That gap is worth roughly 114 fewer late arrivals for every thousand flights.
Key figures
On time
89.0%
Arrivals under 15 minutes late, of 299 completed flights
Avg delay
43 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
1.7%
National rate is 8.1%
These figures cover 299 flights between July 2025 and June 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.
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 166 of 299 flights, with 07:40 (60 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 07:00166 flights55.5%
- Departs 07:4060 flights20.1%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 level with that at 89.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
AS 511 next to PHX to PDX
Every carrier on PHX to PDX combined arrived on time 78.7% of the time across 3,731 flights, so AS 511 is 10 points ahead of it. Alaska flew 1,372 flights on the same city pair under all its flight numbers, including this one, and those ran 87.9% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 511thin sample | 299 | 89.0% | 43 min | 0.00% | A+ |
| All Alaska Airlines on PHX–PDX | 1,372 | 87.9% | 57 min | 0.29% | A+ |
| All carriers on PHX–PDX | 3,731 | 78.7% | 54 min | 0.38% | B+ |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | 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 75 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 202592 flights92.4%
- Oct–Dec 202591 flights81.3%
- Jan–Mar 202667 flights89.6%
- Apr–Jun 202649 flights95.9%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 511 did best on Thursday at 95.3% on time and worst on Friday at 79.1%. Each day rests on about 43 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Delay causes
Why AS 511 runs late
One category carries most of the weight here. Carrier accounts for 52% of the 1,427 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 52%Carrier
- 27%National Airspace System
- 19%Late-arriving aircraft
- 1%Security
- 1%Extreme weather
The largest share of delay minutes, 52%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 747 of the 1,427 delay minutes reported here. The split is drawn from 1,427 delay minutes reported on AS 511.
Cancellations are rare at 0.00%, below the national 1.81% 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 1.7% land an hour or more behind schedule, against 8.1% 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
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: 89.0% 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 route86.2%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.