Flight number record

UA 1724

United Airlines · Kailua-Kona to San Francisco

Route: KOA → SFO
Departs: 22:50
Flights: 277
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1724, check with United Airlines.

UA 1724 earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 18 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 3.4 hours. That rests on 277 flights, with a median arrival 18 minutes early.

Set against the rest of the country, UA 1724's record is 18 points better than the US average of 77.6%. That gap is worth roughly 184 fewer late arrivals for every thousand flights.

On time

96.0%

Arrivals under 15 minutes late, of 274 completed flights

Avg delay

201 min

Across delayed arrivals only, not all flights

Cancelled

0.72%

National rate is 1.81%

1 hour+ late

1.1%

National rate is 8.1%

These figures cover 277 flights between July 2025 and June 2026. The median arrival is 18 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.

Schedule

When UA 1724 flies

UA 1724 flies KOA to SFO without a single fixed slot. Its most common scheduled departure was 22:50, used on 90 of 277 flights, with 22:55 (44 flights) and 23:00 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 22:5090 flights32.5%
Departs 22:5544 flights15.9%
Departs 23:0037 flights13.4%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and UA 1724 runs 26 points better at 96.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

UA 1724 next to KOA to SFO

Every carrier on KOA to SFO combined arrived on time 83.4% of the time across 1,079 flights, so UA 1724 is 13 points ahead of it. United flew 861 flights on the same city pair under all its flight numbers, including this one, and those ran 86.5% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 17 points.

UA 1724 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1724thin sample	277	96.0%	201 min	0.72%	A+
All United Airlines on KOA–SFO	861	86.5%	67 min	1.05%	A
All carriers on KOA–SFO	1,079	83.4%	65 min	0.93%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1724 quarter by quarter

Quarter by quarter UA 1724 held fairly steady: 97.8% in Jul–Sep 2025, 95.2% in Oct–Dec 2025, 90.0% in Jan–Mar 2026 and 97.8% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights97.8%
Oct–Dec 202542 flights95.2%
Jan–Mar 202652 flights90.0%
Apr–Jun 202691 flights97.8%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1724 ranged from 89.5% on Tuesday to 97.6% on Sunday. With about 40 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 1724 runs late

One category carries most of the weight here. Carrier accounts for 87% of the 2,211 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
87%
Late-arriving aircraft
9%
National Airspace System
5%

The largest share of delay minutes, 87%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,917 of the 2,211 delay minutes reported here. The split is drawn from 2,211 delay minutes reported on UA 1724.

Cancellations are rare at 0.72%, below the national 1.81% 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 1.1% land an hour or more behind schedule, against 8.1% 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 same number turns up on four other city pairs in the data, including IND to DEN (37), IAD to SEA (16) and PHX to SFO (6), but none flew often enough under UA 1724 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to KOA to SFO only.

One caution: this is a thin sample. 277 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 1724

For a booking, UA 1724 has one of the better records a US domestic flight can show: 96.0% on time and 0.72% cancelled. That is a base rate, not a promise about any single day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures