Flight number record
UA 574
United Airlines · Las Vegas to San Francisco
- Route
- LAS → SFO
- Departs
- 11:30
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 574, check with United Airlines.
UA 574 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 364 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.3%, so UA 574 runs 11 points behind the country as a whole. Across a thousand flights that is about 112 extra late arrivals.
Key figures
On time
66.1%
Arrivals under 15 minutes late, of 363 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.27%
National rate is 1.89%
1 hour+ late
11.3%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 574 flies
UA 574 flies LAS to SFO without a single fixed slot. Its most common scheduled departure was 11:30, used on 68 of 364 flights, with 11:07 (52 flights) next.
- Departs 11:3068 flights18.7%
- Departs 11:0752 flights14.3%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and UA 574 runs 12 points worse at 66.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
UA 574 next to LAS to SFO
Every carrier on LAS to SFO combined arrived on time 58.0% of the time across 6,137 flights, so UA 574 is 8 points ahead of it. United flew 2,816 flights on the same city pair under all its flight numbers, including this one, and those ran 62.6% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 13 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 574thin sample | 364 | 66.1% | 59 min | 0.27% | C+ |
| All United Airlines on LAS–SFO | 2,816 | 62.6% | 64 min | 0.43% | D+ |
| All carriers on LAS–SFO | 6,137 | 58.0% | 60 min | 0.77% | D+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 574 quarter by quarter
UA 574 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Apr–Jun 2026 at 42.9%, a swing of 47 points on roughly 73 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 flights90.0%
- Oct–Dec 202592 flights70.3%
- Jan–Mar 202690 flights76.7%
- Apr–Jun 202691 flights42.9%
- Jul–Sep 202661 flights67.2%
Scale runs 35% to 95%.
By weekday, UA 574 did best on Saturday at 84.6% on time and worst on Friday at 49.0%. Each day rests on about 52 flights, so a gap of 36 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 574 runs when it is late
The 123 late arrivals split 41 under half an hour, 41 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early83 flights22.9%
- Within 15 min157 flights43.3%
- 15–29 min late41 flights11.3%
- 30–59 min late41 flights11.3%
- 1–2 hours late31 flights8.5%
- 2+ hours late10 flights2.8%
Scale runs 0% to 100%.
Share of 363 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 91 departures that left 15 minutes late or more, only 8 made it up before arrival. In the other direction, 40 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for UA 574
The latest arrival of the period was on 16 July 2026, 11 hours 7 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across July, October, May, April and January, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 July 2026 | 11 hours 7 minutes | Carrier |
| 2 October 2025 | 4 hours 49 minutes | Carrier |
| 28 May 2026 | 3 hours 35 minutes | National Airspace System |
| 20 April 2026 | 3 hours 30 minutes | National Airspace System |
| 14 January 2026 | 2 hours 56 minutes | Late-arriving aircraft |
Delay causes
Why UA 574 runs late
National Airspace System accounts for 61% of the 7,286 delay minutes carriers reported here, and the remaining four split what is left.
- 61%National Airspace System
- 20%Carrier
- 19%Late-arriving aircraft
61% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 4,408 minutes out of 7,286, against a national NAS share of 21%. The split is drawn from 7,286 delay minutes reported on UA 574.
Cancellations are rare at 0.27%, 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
11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
UA 574 is not only a LAS to SFO flight. It also flew ORD to LAS (290 flights, 96.9% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.
One caution: this is a thin sample. 364 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.
| Also flown as | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| ORD to LASthin sample | 290 | 96.9% | 59 min | 0.00% | A+ |
What to do with this
Booking UA 574
For a booking, read UA 574 as 66.1% on time with 0.27% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAS to SFO, every carrier and departure
- SFO to LAS, the return direction
- United Airlines 2356 on the same route59.1%
- Frontier Airlines 4401 on the same route48.0%
- United Airlines 2047 on the same route67.7%
- United Airlines 1799 on the same route52.8%
- Frontier Airlines 3801 on the same route60.1%
- Alaska Airlines 634 on the same route53.9%
- Harry Reid International (LAS) 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
- How often a connection fails at the major US hubs
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.