Flight number record
AS 252
Alaska Airlines · Portland to Kailua-Kona
- Route
- PDX → KOA
- Departs
- 08:00
- Flights
- 295
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 252, check with Alaska Airlines.
AS 252 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 295 flights, with a median arrival 10 minutes early.
Set against the rest of the country, AS 252's record is 9 points better than the US average of 77.3%. That gap is worth roughly 90 fewer late arrivals for every thousand flights.
Key figures
On time
86.3%
Arrivals under 15 minutes late, of 293 completed flights
Avg delay
42 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
1.7%
National rate is 8.3%
These figures cover 295 flights between September 2025 and August 2026. The median arrival is 10 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 252 flies
AS 252 flies PDX to KOA without a single fixed slot. Its most common scheduled departure was 08:00, used on 70 of 295 flights, with 07:00 (41 flights) and 07:45 (35 flights) next.
- Departs 08:0070 flights23.7%
- Departs 07:0041 flights13.9%
- Departs 07:4535 flights11.9%
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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 252 runs 2 points better at 86.3%. 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 252 next to PDX to KOA
Every carrier on PDX to KOA combined arrived on time 86.5% of the time across 365 flights, so AS 252 is about level with it. 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 252thin sample | 295 | 86.3% | 42 min | 0.00% | A+ |
| All Alaska Airlines on PDX–KOA | 365 | 86.5% | 41 min | 0.00% | A+ |
| All carriers on PDX–KOA | 365 | 86.5% | 41 min | 0.00% | A+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 252 quarter by quarter
AS 252 did not run the same all year. Its best quarter was Jul–Sep 2026 at 100.0% on time and its weakest Oct–Dec 2025 at 71.9%, a swing of 28 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.
- Oct–Dec 202566 flights71.9%
- Jan–Mar 202689 flights79.8%
- Apr–Jun 202691 flights95.6%
- Jul–Sep 202649 flights100.0%
Scale runs 65% to 100%.
By weekday, AS 252 did best on Thursday at 92.7% on time and worst on Sunday at 78.6%. Each day rests on about 42 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 252 runs when it is late
AS 252 often beats the schedule: 113 of 293 completed flights, 39%, arrived 15 minutes or more early. Most of the lateness is short. 20 of the 40 late arrivals were under half an hour behind, and 5 reached an hour or more.
- 15+ min early113 flights38.6%
- Within 15 min140 flights47.8%
- 15–29 min late20 flights6.8%
- 30–59 min late15 flights5.1%
- 1–2 hours late3 flights1.0%
- 2+ hours late2 flights0.7%
Scale runs 0% to 100%.
Share of 293 completed flights by arrival against schedule.
A late pushback is often recovered here: of 38 departures that left 15 minutes late or more, 22 still arrived on time. 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 KOA.
The worst days
Worst days for AS 252
The latest arrival of the period was on 17 May 2026, 3 hours 11 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 May 2026 | 3 hours 11 minutes | Carrier |
| 22 March 2026 | 2 hours 54 minutes | Carrier |
| 24 March 2026 | 1 hour 48 minutes | Carrier |
| 16 March 2026 | 1 hour 32 minutes | Carrier |
| 5 November 2025 | 1 hour 17 minutes | National Airspace System |
Delay causes
Why AS 252 runs late
National Airspace System accounts for 50% of the 1,689 delay minutes carriers reported here, and the remaining four split what is left.
- 50%National Airspace System
- 42%Carrier
- 6%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 712 of the 1,689 delay minutes reported here. The split is drawn from 1,689 delay minutes reported on AS 252.
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 1.7% 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.
At 2,607 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 295 flights under AS 252 in the data flew PDX to KOA. 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. 295 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 252
For a booking, AS 252 has one of the better records a US domestic flight can show: 86.3% on time and 0.00% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- 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
- 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.