Flight number record
UA 373
United Airlines · Honolulu to San Francisco
- Route
- HNL → SFO
- Departs
- 07:00
- Flights
- 345
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 373, check with United Airlines.
UA 373 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 about 2.4 hours. That rests on 345 flights, with a median arrival 11 minutes early.
Set against the rest of the country, UA 373's record is 13 points better than the US average of 77.3%. That gap is worth roughly 125 fewer late arrivals for every thousand flights.
Key figures
On time
89.8%
Arrivals under 15 minutes late, of 343 completed flights
Avg delay
147 min
Across delayed arrivals only, not all flights
Cancelled
0.58%
National rate is 1.89%
1 hour+ late
4.7%
National rate is 8.3%
These figures cover 345 flights between September 2025 and August 2026. The median arrival is 11 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 373 flies
UA 373 flies HNL to SFO without a single fixed slot. Its most common scheduled departure was 07:00, used on 137 of 345 flights, with 08:00 (126 flights) and 07:10 (82 flights) next.
- Departs 07:00137 flights39.7%
- Departs 08:00126 flights36.5%
- Departs 07:1082 flights23.8%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 373 runs level with that at 89.8%. 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 373 next to HNL to SFO
Every carrier on HNL to SFO combined arrived on time 80.8% of the time across 2,476 flights, so UA 373 is 9 points ahead of it. United flew 1,779 flights on the same city pair under all its flight numbers, including this one, and those ran 85.1% on time. Across its whole network United Airlines managed 78.8%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 373thin sample | 345 | 89.8% | 147 min | 0.58% | A+ |
| All United Airlines on HNL–SFO | 1,779 | 85.1% | 64 min | 0.62% | A+ |
| All carriers on HNL–SFO | 2,476 | 80.8% | 61 min | 1.21% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 373 quarter by quarter
UA 373 did not run the same all year. Its best quarter was Oct–Dec 2025 at 95.7% on time and its weakest Apr–Jun 2026 at 83.1%, a swing of 13 points on roughly 69 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 flights86.7%
- Oct–Dec 202592 flights95.7%
- Jan–Mar 202690 flights87.8%
- Apr–Jun 202671 flights83.1%
- Jul–Sep 202662 flights93.3%
Scale runs 75% to 100%.
By weekday, UA 373 did best on Friday at 95.9% on time and worst on Sunday at 83.7%. Each day rests on about 49 flights, so a gap of 12 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 373 runs when it is late
UA 373 often beats the schedule: 145 of 343 completed flights, 42%, arrived 15 minutes or more early. The 35 late arrivals split 13 under half an hour, 6 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early145 flights42.3%
- Within 15 min163 flights47.5%
- 15–29 min late13 flights3.8%
- 30–59 min late6 flights1.7%
- 1–2 hours late4 flights1.2%
- 2+ hours late12 flights3.5%
Scale runs 0% to 100%.
Share of 343 completed flights by arrival against schedule.
7 of 29 late departures made up the time and arrived on time, 24% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for UA 373
The latest arrival of the period was on 14 September 2025, 17 hours 20 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 September 2025 | 17 hours 20 minutes | Late-arriving aircraft |
| 30 June 2026 | 9 hours 54 minutes | Late-arriving aircraft |
| 20 February 2026 | 8 hours 59 minutes | Late-arriving aircraft |
| 1 February 2026 | 6 hours 20 minutes | Carrier |
| 10 January 2026 | 6 hours 3 minutes | Carrier |
Delay causes
Why UA 373 runs late
Carrier accounts for 57% of the 5,127 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Carrier
- 37%Late-arriving aircraft
- 7%National Airspace System
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,127 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 5,127 delay minutes reported on UA 373.
Cancellations are rare at 0.58%, 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 4.7% 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 2,398 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 eight other city pairs in the data, including SFO to AUS (54), SFO to MSP (43) and SFO to ONT (29), but none flew often enough under UA 373 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to HNL to SFO only.
One caution: this is a thin sample. 345 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 373
For a booking, UA 373 has one of the better records a US domestic flight can show: 89.8% on time and 0.58% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- HNL to SFO, every carrier and departure
- SFO to HNL, the return direction
- United Airlines 1947 on the same route79.7%
- Daniel K. Inouye International (HNL) delay statistics
- 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
- Why the first flight of the morning is statistically safest
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.