Flight number record
AS 238
Alaska Airlines · Seattle to Kailua-Kona
- Route
- SEA → KOA
- Departs
- 15:59
- Flights
- 256
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 238, check with Alaska Airlines.
AS 238 lands a B, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 256 flights, with a median arrival 7 minutes early.
Key figures
On time
77.0%
Arrivals under 15 minutes late, of 248 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.17%
National rate is 1.89%
1 hour+ late
6.0%
National rate is 8.3%
These figures cover 256 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 238 flies
AS 238 flies SEA to KOA without a single fixed slot. Its most common scheduled departure was 15:59, used on 70 of 256 flights, with 12:44 (34 flights) and 15:40 (28 flights) next.
- Departs 15:5970 flights27.3%
- Departs 12:4434 flights13.3%
- Departs 15:4028 flights10.9%
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 15:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 238 runs 5 points better at 77.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 238 next to SEA to KOA
Every carrier on SEA to KOA combined arrived on time 74.5% of the time across 1,410 flights, so AS 238 is 3 points ahead of it. Alaska flew 1,045 flights on the same city pair under all its flight numbers, including this one, and those ran 73.9% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 238thin sample | 256 | 77.0% | 54 min | 1.17% | B |
| All Alaska Airlines on SEA–KOA | 1,045 | 73.9% | 51 min | 1.15% | C |
| All carriers on SEA–KOA | 1,410 | 74.5% | 50 min | 1.42% | C |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 238 quarter by quarter
AS 238 did not run the same all year. Its best quarter was Apr–Jun 2026 at 90.0% on time and its weakest Jan–Mar 2026 at 62.9%, a swing of 27 points on roughly 85 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 202525 flights—
- Jan–Mar 202689 flights62.9%
- Apr–Jun 202680 flights90.0%
- Jul–Sep 202662 flights76.3%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 238 did best on Wednesday at 91.4% on time and worst on Friday at 61.1%. Each day rests on about 37 flights, so a gap of 30 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 238 runs when it is late
AS 238 often beats the schedule: 81 of 248 completed flights, 33%, arrived 15 minutes or more early. The 57 late arrivals split 25 under half an hour, 17 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early81 flights32.7%
- Within 15 min110 flights44.4%
- 15–29 min late25 flights10.1%
- 30–59 min late17 flights6.9%
- 1–2 hours late10 flights4.0%
- 2+ hours late5 flights2.0%
Scale runs 0% to 100%.
Share of 248 completed flights by arrival against schedule.
A late pushback is often recovered here: of 67 departures that left 15 minutes late or more, 25 still arrived on time. In the other direction, 15 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 238
The latest arrival of the period was on 13 March 2026, 4 hours 16 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 March 2026 | 4 hours 16 minutes | Late-arriving aircraft |
| 3 August 2026 | 3 hours 55 minutes | Carrier |
| 13 June 2026 | 3 hours 19 minutes | Carrier |
| 20 March 2026 | 2 hours 23 minutes | Carrier |
| 6 February 2026 | 2 hours 15 minutes | Carrier |
Delay causes
Why AS 238 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,084 reported delay minutes.
- 40%Late-arriving aircraft
- 30%Carrier
- 29%National Airspace System
- 1%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,084 reported delay minutes here, that single category outweighs weather by 29 to one. The split is drawn from 3,084 delay minutes reported on AS 238.
Cancellations sit at 1.17% against a national 1.89%, which is ordinary. Diversions add another 1.95%.
Connections and routes
What a delay on this flight costs
6.0% 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.
At 2,688 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.
The same number turns up on two other city pairs in the data, including SAN to KOA (26) and SAN to LIH (16), but none flew often enough under AS 238 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to KOA only.
One caution: this is a thin sample. 256 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 238
For a booking, read AS 238 as 77.0% on time with 1.17% cancelled over 256 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to KOA, every carrier and departure
- KOA to SEA, the return direction
- Delta Air Lines 340 on the same route76.1%
- Seattle-Tacoma International (SEA) 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
- Why the first flight of the morning is statistically safest
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.