Flight number record
UA 2373
United Airlines · Los Angeles to Kailua-Kona
- Route
- LAX → KOA
- Departs
- 09:00
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2373, check with United Airlines.
UA 2373 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 365 flights, with a median arrival 12 minutes early.
Set against the rest of the country, UA 2373's record is 13 points better than the US average of 77.3%. That gap is worth roughly 133 fewer late arrivals for every thousand flights.
Key figures
On time
90.6%
Arrivals under 15 minutes late, of 362 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.89%
1 hour+ late
2.5%
National rate is 8.3%
These figures cover 365 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 UA 2373 flies
UA 2373 flies LAX to KOA without a single fixed slot. Its most common scheduled departure was 09:00, used on 243 of 365 flights.
- Departs 09:00243 flights66.6%
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 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 2373 runs 7 points better at 90.6%. 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
UA 2373 next to LAX to KOA
Every carrier on LAX to KOA combined arrived on time 81.8% of the time across 1,601 flights, so UA 2373 is 9 points ahead of it. Across its whole network United Airlines managed 78.8%, which this flight beats by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2373 | 365 | 90.6% | 53 min | 0.55% | A+ |
| All United Airlines on LAX–KOA | 489 | 89.2% | 44 min | 0.82% | A+ |
| All carriers on LAX–KOA | 1,601 | 81.8% | 52 min | 0.94% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2373 quarter by quarter
Quarter by quarter UA 2373 held fairly steady: 90.0% in Jul–Sep 2025, 91.2% in Oct–Dec 2025, 93.3% in Jan–Mar 2026, 87.9% in Apr–Jun 2026 and 90.2% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202530 flights90.0%
- Oct–Dec 202592 flights91.2%
- Jan–Mar 202690 flights93.3%
- Apr–Jun 202691 flights87.9%
- Jul–Sep 202662 flights90.2%
Scale runs 80% to 100%.
By weekday, UA 2373 ranged from 84.6% on Sunday to 94.2% on Friday. With about 52 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2373 runs when it is late
UA 2373 often beats the schedule: 162 of 362 completed flights, 45%, arrived 15 minutes or more early. The 34 late arrivals split 15 under half an hour, 10 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early162 flights44.8%
- Within 15 min166 flights45.9%
- 15–29 min late15 flights4.1%
- 30–59 min late10 flights2.8%
- 1–2 hours late6 flights1.7%
- 2+ hours late3 flights0.8%
Scale runs 0% to 100%.
Share of 362 completed flights by arrival against schedule.
A late pushback is often recovered here: of 38 departures that left 15 minutes late or more, 19 still arrived on time. 15 flights left on time and still arrived late.
The worst days
Worst days for UA 2373
The latest arrival of the period was on 5 January 2026, 3 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 January 2026 | 3 hours 43 minutes | Carrier |
| 19 July 2026 | 2 hours 42 minutes | Carrier |
| 19 April 2026 | 2 hours 40 minutes | Late-arriving aircraft |
| 12 April 2026 | 1 hour 54 minutes | Late-arriving aircraft |
| 3 May 2026 | 1 hour 50 minutes | Late-arriving aircraft |
Delay causes
Why UA 2373 runs late
Carrier accounts for 44% of the 1,817 delay minutes carriers reported here, and the remaining four split what is left.
- 44%Carrier
- 31%Late-arriving aircraft
- 25%National Airspace System
The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 803 of the 1,817 delay minutes reported here. The split is drawn from 1,817 delay minutes reported on UA 2373.
Cancellations are rare at 0.55%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is 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 2.5% 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 2,504 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 same number turns up on one other city pair in the data, including ORD to LAX (64), but none flew often enough under UA 2373 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to KOA only.
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 UA 2373
For a booking, UA 2373 has one of the better records a US domestic flight can show: 90.6% on time and 0.55% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAX to KOA, every carrier and departure
- KOA to LAX, the return direction
- Delta Air Lines 311 on the same route81.1%
- Alaska Airlines 560 on the same route80.2%
- American Airlines 59 on the same route77.0%
- Los Angeles International (LAX) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means United 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.