Carrier route record
ASSFO→KOA
Alaska Airlines · San Francisco to Kailua-Kona
- Flights
- 244
- Period
- September 2025 to August 2026
- Share of route
- 20%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Alaska Airlines.
Alaska on SFO to KOA 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 14 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 244 flights, with a median arrival 14 minutes early.
Set against the rest of the country, Alaska's SFO to KOA record is 14 points better than the US average of 77.3%. That gap is worth roughly 141 fewer late arrivals for every thousand flights.
Key figures
On time
91.4%
Arrivals under 15 minutes late, of 243 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
86.9%
Every carrier on SFO to KOA, 1,202 flights
These figures cover 244 flights between September 2025 and August 2026. The median arrival is 14 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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Carrier by carrier
Alaska against every carrier on SFO to KOA
Alaska flew 244 of the 1,202 flights on SFO to KOA, about 20% of it. Its 91.4% on time is 5 points better than the route as a whole, which runs 86.9%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Alaska at 91.4% to United at 85.7%.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Alaska Airlines (this page)thin sample | 244 | 91.4% | 63 min | 0.00% | A+ |
| United Airlines | 958 | 85.7% | 50 min | 0.52% | A+ |
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Departure window
When Alaska runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 244 flights.
There are not enough flights in each departure window to split Alaska's SFO to KOA record by time of day without the percentages moving on noise. The headline rate of 91.4% is the reliable figure here.
Across the year
Alaska on SFO to KOA through the year
- Jul–Sep 202517 flights—
- Oct–Dec 202552 flights92.2%
- Jan–Mar 202652 flights82.7%
- Apr–Jun 202661 flights98.4%
- Jul–Sep 202662 flights93.5%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 91.4% on time across 244 flights.
Alaska on SFO to KOA did not run the same all year. Its best quarter was Apr–Jun 2026 at 98.4% on time and its weakest Jan–Mar 2026 at 82.7%, a swing of 16 points on roughly 61 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.
Across the week, Tuesday is the strongest day at 97.6% on time and Saturday the weakest at 86.5%, a spread of 11 points.
Arrival by arrival
How late Alaska on SFO to KOA runs when it is late
Alaska on SFO to KOA often beats the schedule: 115 of 243 completed flights, 47%, arrived 15 minutes or more early. Most of the lateness is short. 11 of the 21 late arrivals were under half an hour behind, and 8 reached an hour or more.
- 15+ min early115 flights47.3%
- Within 15 min107 flights44.0%
- 15–29 min late11 flights4.5%
- 30–59 min late2 flights0.8%
- 1–2 hours late5 flights2.1%
- 2+ hours late3 flights1.2%
Scale runs 0% to 100%.
Share of 243 completed flights by arrival against schedule.
Only 18 of 243 completed flights left 15 minutes late or more, too few to say how often the time is made up.
The worst days
Worst days for Alaska on SFO to KOA
The latest arrival of the period was on 20 June 2026, 3 hours 32 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 June 2026 | 3 hours 32 minutes | Carrier |
| 28 March 2026 | 3 hours 4 minutes | Carrier |
| 18 October 2025 | 2 hours 49 minutes | Carrier |
| 8 August 2026 | 1 hour 56 minutes | Carrier |
| 24 January 2026 | 1 hour 50 minutes | Carrier |
Delay causes
Why Alaska runs late on this route
Carrier accounts for 77% of the 1,321 delay minutes carriers reported here, and the remaining four split what is left.
- 77%Carrier
- 23%National Airspace System
The largest share of delay minutes, 77%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,019 of the 1,321 delay minutes reported here. The split is drawn from 1,321 reported delay minutes.
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 stage length
What a delay here costs
Badly late arrivals are rare here: only 3.3% 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.
At 2,368 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 return leg is a different operation and performs like one: it runs 71.0% on time across 244 flights, 20 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 20 points of difference.
One caution: this is a thin sample. 244 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 Alaska on SFO to KOA
Put together: treat all of this as provisional. 244 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 91.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 243 completed flights over 12 months sit behind that.
Related
Where to go next
- SFO to KOA, every carrier
- Alaska on KOA to SFO, the return leg
- United Airlines on SFO to KOA85.7%
- Alaska Airlines network-wide record
- San Francisco International (SFO) delay statistics
- The best day of the week to fly, and why it is the second lever
- How to read this site: grades, sample sizes, and honest caveats
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.