Flight number record
AS 606
Alaska Airlines · Seattle to Phoenix
- Route
- SEA → PHX
- Departs
- 08:15
- Flights
- 296
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 606, check with Alaska Airlines.
AS 606 earns an A. More than four flights in five 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 roughly 50 minutes. That rests on 296 flights, with a median arrival 12 minutes early.
Set against the rest of the country, AS 606's record is 10 points better than the US average of 77.3%. That gap is worth roughly 96 fewer late arrivals for every thousand flights.
Key figures
On time
86.9%
Arrivals under 15 minutes late, of 290 completed flights
Avg delay
48 min
Across delayed arrivals only, not all flights
Cancelled
1.69%
National rate is 1.89%
1 hour+ late
1.4%
National rate is 8.3%
These figures cover 296 flights between September 2025 and August 2026. The median arrival is 12 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 606 flies
AS 606 flies SEA to PHX without a single fixed slot. Its most common scheduled departure was 08:15, used on 34 of 296 flights, with 07:46 (32 flights) and 08:06 (30 flights) next.
- Departs 08:1534 flights11.5%
- Departs 07:4632 flights10.8%
- Departs 08:0630 flights10.1%
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 08:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 606 runs 3 points better at 86.9%. 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 606 next to SEA to PHX
Every carrier on SEA to PHX combined arrived on time 78.2% of the time across 7,205 flights, so AS 606 is 9 points ahead of it. Alaska flew 2,889 flights on the same city pair under all its flight numbers, including this one, and those ran 79.2% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 606thin sample | 296 | 86.9% | 48 min | 1.69% | A |
| All Alaska Airlines on SEA–PHX | 2,889 | 79.2% | 45 min | 0.66% | B+ |
| All carriers on SEA–PHX | 7,205 | 78.2% | 57 min | 0.74% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 606 quarter by quarter
AS 606 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.8% on time and its weakest Oct–Dec 2025 at 76.9%, a swing of 20 points on roughly 74 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 202529 flights—
- Oct–Dec 202592 flights76.9%
- Jan–Mar 202678 flights88.2%
- Apr–Jun 202663 flights96.8%
- Jul–Sep 202634 flights84.8%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 606 did best on Tuesday at 92.9% on time and worst on Thursday at 80.9%. Each day rests on about 42 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 606 runs when it is late
AS 606 often beats the schedule: 114 of 290 completed flights, 39%, arrived 15 minutes or more early. The 38 late arrivals split 15 under half an hour, 19 between 30 and 60 minutes, and 4 an hour or more.
- 15+ min early114 flights39.3%
- Within 15 min138 flights47.6%
- 15–29 min late15 flights5.2%
- 30–59 min late19 flights6.6%
- 1–2 hours late2 flights0.7%
- 2+ hours late2 flights0.7%
Scale runs 0% to 100%.
Share of 290 completed flights by arrival against schedule.
6 of 33 late departures made up the time and arrived on time, 18% of them. 11 flights left on time and still arrived late.
The worst days
Worst days for AS 606
The latest arrival of the period was on 8 June 2026, 4 hours 46 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 |
|---|---|---|
| 8 June 2026 | 4 hours 46 minutes | Carrier |
| 25 October 2025 | 3 hours 26 minutes | Carrier |
| 27 August 2026 | 1 hour 47 minutes | Carrier |
| 13 March 2026 | 1 hour 13 minutes | National Airspace System |
| 21 November 2025 | 57 minutes | Late-arriving aircraft |
Delay causes
Why AS 606 runs late
Carrier accounts for 56% of the 1,805 delay minutes carriers reported here, and the remaining four split what is left.
- 56%Carrier
- 33%National Airspace System
- 8%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 56%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,017 of the 1,805 delay minutes reported here. The split is drawn from 1,805 delay minutes reported on AS 606.
Cancellations sit at 1.69% against a national 1.89%, which is ordinary. Diversions add another 0.34%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 1.4% 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 1,107 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 296 flights under AS 606 in the data flew SEA to PHX. 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. 296 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 606
For a booking, read AS 606 as 86.9% on time with 1.69% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to PHX, every carrier and departure
- PHX to SEA, the return direction
- Delta Air Lines 2419 on the same route89.8%
- Alaska Airlines 700 on the same route78.4%
- Delta Air Lines 2698 on the same route73.7%
- Alaska Airlines 744 on the same route74.7%
- Alaska Airlines 632 on the same route74.0%
- Delta Air Lines 2442 on the same route80.4%
- Seattle-Tacoma International (SEA) delay statistics
- Phoenix Sky Harbor International (PHX) 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
- The best time of day to fly, according to 7.05 million flight records
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.