Carrier route record
DLLAX→KOA
Delta Air Lines · Los Angeles to Kailua-Kona
- Flights
- 365
- Period
- September 2025 to August 2026
- Share of route
- 23%
- Carriers
- 5
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on LAX to KOA lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 365 flights. The strongest carrier on the route with a full sample, United Airlines, flew 489 at 89.2% on time.
The US average over the same twelve months is 77.3%, so there is little to separate Delta on LAX to KOA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
81.1%
Arrivals under 15 minutes late, of 360 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
1.37%
National rate is 1.89%
Whole route
81.8%
Every carrier on LAX to KOA, 1,601 flights
These figures cover 365 flights between September 2025 and August 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.
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Carrier by carrier
Delta against every carrier on LAX to KOA
Delta flew 365 of the 1,601 flights on LAX to KOA, about 23% of it. Its 81.1% on time is about level with the route as a whole at 81.8%. Ranked by on-time rate it is number three of five carriers on the route, where the range runs from Southwest at 91.3% to American at 74.9%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. United Airlines arrives on time 89.2% of the time; Alaska Airlines manages 78.7%. Sample sizes sit next to every figure, because a two-point gap across 374 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 23 | 91.3% | 47 min | 0.00% | A+ |
| United Airlines | 489 | 89.2% | 44 min | 0.82% | A+ |
| Delta Air Lines (this page) | 365 | 81.1% | 58 min | 1.37% | B |
| Alaska Airlines | 374 | 78.7% | 37 min | 1.07% | B |
| American Airlinesthin sample | 350 | 74.9% | 65 min | 0.57% | C+ |
United leads Alaska by 11 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Delta flight numbers on LAX to KOA
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Delta 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 365 flights.
There are not enough flights in each departure window to split Delta's LAX to KOA record by time of day without the percentages moving on noise. The headline rate of 81.1% is the reliable figure here.
Across the year
Delta on LAX to KOA through the year
December is the weak month at 61.3% on time, against 93.3% in August. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. January was the busiest month here, with 31 flights.
Across the week, Monday is the strongest day at 86.5% on time and Wednesday the weakest at 76.9%, a spread of 10 points.
Arrival by arrival
How late Delta on LAX to KOA runs when it is late
Delta on LAX to KOA often beats the schedule: 116 of 360 completed flights, 32%, arrived 15 minutes or more early. The 68 late arrivals split 22 under half an hour, 23 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early116 flights32.2%
- Within 15 min176 flights48.9%
- 15–29 min late22 flights6.1%
- 30–59 min late23 flights6.4%
- 1–2 hours late16 flights4.4%
- 2+ hours late7 flights1.9%
Scale runs 0% to 100%.
Share of 360 completed flights by arrival against schedule.
19 of 78 late departures made up the time and arrived on time, 24% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for Delta on LAX to KOA
The latest arrival of the period was on 22 April 2026, 4 hours 34 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 |
|---|---|---|
| 22 April 2026 | 4 hours 34 minutes | Carrier |
| 20 December 2025 | 4 hours 12 minutes | Carrier |
| 5 August 2026 | 3 hours 8 minutes | Carrier |
| 25 February 2026 | 2 hours 8 minutes | Late-arriving aircraft |
| 6 May 2026 | 2 hours 8 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Carrier accounts for 66% of the 3,974 delay minutes carriers reported here, and the remaining four split what is left.
- 66%Carrier
- 22%Late-arriving aircraft
- 12%National Airspace System
The largest share of delay minutes, 66%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,638 of the 3,974 delay minutes reported here. The split is drawn from 3,974 reported delay minutes.
Cancellations sit at 1.37% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
6.4% 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 an hour, which a normal layover absorbs.
At 2,504 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 90.4% on time across 365 flights, 9 points above 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 9 points of difference.
One caution: this is a thin sample. 365 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 Delta on LAX to KOA
Put together: treat all of this as provisional. 365 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 81.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 360 completed flights over 12 months sit behind that.
Related
Where to go next
- LAX to KOA, every carrier
- Delta on KOA to LAX, the return leg
- United Airlines on LAX to KOA89.2%
- Alaska Airlines on LAX to KOA78.7%
- American Airlines on LAX to KOA74.9%
- Delta Air Lines network-wide record
- Los Angeles International (LAX) delay statistics
- Same route, different airline: where the carrier you pick matters most
- Do budget airlines really get delayed more? The numbers
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.