Flight number record
UA 1724
United Airlines · Kailua-Kona to San Francisco
- Route
- KOA → SFO
- Departs
- 22:50
- Flights
- 277
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 19 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 2.4 hours. That rests on 277 flights, with a median arrival 19 minutes early.
Set against the rest of the country, UA 1724's record is 19 points better than the US average of 77.3%. That gap is worth roughly 194 fewer late arrivals for every thousand flights.
Key figures
On time
96.7%
Arrivals under 15 minutes late, of 273 completed flights
Avg delay
141 min
Across delayed arrivals only, not all flights
Cancelled
1.08%
National rate is 1.89%
1 hour+ late
0.4%
National rate is 8.3%
These figures cover 277 flights between September 2025 and August 2026. The median arrival is 19 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 1724 flies
UA 1724 flies KOA to SFO without a single fixed slot. Its most common scheduled departure was 22:50, used on 103 of 277 flights, with 22:55 (44 flights) and 22:48 (32 flights) next.
- Departs 22:50103 flights37.2%
- Departs 22:5544 flights15.9%
- Departs 22:4832 flights11.6%
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 22:50 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 1724 runs 27 points better at 96.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 1724 next to KOA to SFO
Every carrier on KOA to SFO combined arrived on time 84.6% of the time across 1,202 flights, so UA 1724 is 12 points ahead of it. United flew 958 flights on the same city pair under all its flight numbers, including this one, and those ran 88.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 18 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1724thin sample | 277 | 96.7% | 141 min | 1.08% | A |
| All United Airlines on KOA–SFO | 958 | 88.1% | 70 min | 1.46% | A |
| All carriers on KOA–SFO | 1,202 | 84.6% | 66 min | 1.41% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 1724 quarter by quarter
UA 1724 did not run the same all year. Its best quarter was Jul–Sep 2025 at 100.0% on time and its weakest Jan–Mar 2026 at 90.0%, a swing of 10 points on roughly 55 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.
- Jul–Sep 202530 flights100.0%
- Oct–Dec 202542 flights95.2%
- Jan–Mar 202652 flights90.0%
- Apr–Jun 202691 flights97.8%
- Jul–Sep 202662 flights100.0%
Scale runs 80% to 100%.
By weekday, UA 1724 ranged from 91.9% on Tuesday to 97.6% on Sunday. With about 40 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 1724 runs when it is late
UA 1724 often beats the schedule: 166 of 273 completed flights, 61%, arrived 15 minutes or more early. Most of the lateness is short. 6 of the 9 late arrivals were under half an hour behind, and 1 reached an hour or more.
- 15+ min early166 flights60.8%
- Within 15 min98 flights35.9%
- 15–29 min late6 flights2.2%
- 30–59 min late2 flights0.7%
- 1–2 hours late0 flights0.0%
- 2+ hours late1 flights0.4%
Scale runs 0% to 100%.
Share of 273 completed flights by arrival against schedule.
Only 12 of 273 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 UA 1724
The latest arrival of the period was on 27 November 2025, 17 hours 53 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 |
|---|---|---|
| 27 November 2025 | 17 hours 53 minutes | Carrier |
| 17 February 2026 | 35 minutes | National Airspace System |
| 14 October 2025 | 30 minutes | Late-arriving aircraft |
| 7 March 2026 | 27 minutes | Carrier |
| 15 March 2026 | 25 minutes | Carrier |
Delay causes
Why UA 1724 runs late
Carrier accounts for 89% of the 1,271 delay minutes carriers reported here, and the remaining four split what is left.
- 89%Carrier
- 8%National Airspace System
- 3%Late-arriving aircraft
The largest share of delay minutes, 89%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,133 of the 1,271 delay minutes reported here. The split is drawn from 1,271 delay minutes reported on UA 1724.
Cancellations sit at 1.08% against a national 1.89%, which is ordinary. Diversions add another 0.36%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 0.4% 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 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: 96.7% on time and 1.08% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- KOA to SFO, every carrier and departure
- SFO to KOA, the return direction
- United Airlines 1722 on the same route81.4%
- San Francisco International (SFO) 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.