Flight number record
UA 2039
United Airlines · Las Vegas to Los Angeles
- Route
- LAS → LAX
- Departs
- 06:00
- Flights
- 303
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2039, check with United Airlines.
UA 2039 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 roughly 30 minutes. That rests on 303 flights, with a median arrival 16 minutes early.
Set against the rest of the country, UA 2039's record is 19 points better than the US average of 77.3%. That gap is worth roughly 191 fewer late arrivals for every thousand flights.
Key figures
On time
96.4%
Arrivals under 15 minutes late, of 302 completed flights
Avg delay
32 min
Across delayed arrivals only, not all flights
Cancelled
0.33%
National rate is 1.89%
1 hour+ late
1.0%
National rate is 8.3%
These figures cover 303 flights between September 2025 and August 2026. The median arrival is 16 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 2039 flies
UA 2039 is scheduled to leave Las Vegas (LAS) at 06:00 local time and reach Los Angeles (LAX) at 07:14. That slot held for 271 of the 303 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.
- Departs 06:00271 flights89.4%
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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and UA 2039 runs 7 points better at 96.4%. 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 2039 next to LAS to LAX
Every carrier on LAS to LAX combined arrived on time 77.9% of the time across 8,203 flights, so UA 2039 is 19 points ahead of it. United flew 1,576 flights on the same city pair under all its flight numbers, including this one, and those ran 85.6% 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 2039thin sample | 303 | 96.4% | 32 min | 0.33% | A+ |
| All United Airlines on LAS–LAX | 1,576 | 85.6% | 59 min | 0.57% | A+ |
| All carriers on LAS–LAX | 8,203 | 77.9% | 63 min | 0.73% | B+ |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2039 quarter by quarter
Quarter by quarter UA 2039 held fairly steady: 100.0% in Jul–Sep 2025, 96.7% in Oct–Dec 2025, 92.5% in Jan–Mar 2026 and 98.6% 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 202530 flights100.0%
- Oct–Dec 202592 flights96.7%
- Jan–Mar 202681 flights92.5%
- Apr–Jun 202671 flights98.6%
- Jul–Sep 202629 flights—
Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2039 ranged from 94.6% on Sunday to 98.0% on Monday. With about 43 flights behind each day, a spread of 3 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late UA 2039 runs when it is late
UA 2039 often beats the schedule: 170 of 302 completed flights, 56%, arrived 15 minutes or more early. Most of the lateness is short. 8 of the 11 late arrivals were under half an hour behind, and 3 reached an hour or more. Not one arrived two hours late.
- 15+ min early170 flights56.3%
- Within 15 min121 flights40.1%
- 15–29 min late8 flights2.6%
- 30–59 min late0 flights0.0%
- 1–2 hours late3 flights1.0%
- 2+ hours late0 flights0.0%
Scale runs 0% to 100%.
Share of 302 completed flights by arrival against schedule.
Only 12 of 302 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 2039
The latest arrival of the period was on 25 January 2026, 1 hour 25 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 January 2026 | 1 hour 25 minutes | National Airspace System |
| 25 February 2026 | 1 hour 12 minutes | Late-arriving aircraft |
| 14 April 2026 | 1 hour | Carrier |
| 9 October 2025 | 23 minutes | Carrier |
| 22 January 2026 | 19 minutes | Carrier |
Delay causes
Why UA 2039 runs late
Carrier accounts for 48% of the 355 delay minutes carriers reported here, and the remaining four split what is left.
- 48%Carrier
- 38%National Airspace System
- 14%Late-arriving aircraft
The largest share of delay minutes, 48%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 170 of the 355 delay minutes reported here. The split is drawn from 355 delay minutes reported on UA 2039.
Cancellations are rare at 0.33%, 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 1.0% 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.
The same number turns up on six other city pairs in the data, including LAX to PIT (97), LAX to BZN (56) and LAX to BWI (32), but none flew often enough under UA 2039 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAS to LAX only.
One caution: this is a thin sample. 303 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 2039
For a booking, UA 2039 has one of the better records a US domestic flight can show: 96.4% on time and 0.33% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAS to LAX, every carrier and departure
- LAX to LAS, the return direction
- Delta Air Lines 553 on the same route93.1%
- United Airlines 2282 on the same route74.6%
- American Airlines 2690 on the same route86.0%
- Frontier Airlines 3291 on the same route82.8%
- Harry Reid International (LAS) delay statistics
- 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.