Flight number record

UA 2039

United Airlines · Las Vegas to Los Angeles

Route: LAS → LAX
Departs: 06:00
Flights: 287
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 287 flights, with a median arrival 15 minutes early.

Set against the rest of the country, UA 2039's record is 19 points better than the US average of 77.6%. That gap is worth roughly 189 fewer late arrivals for every thousand flights.

On time

96.5%

Arrivals under 15 minutes late, of 286 completed flights

Avg delay

34 min

Across delayed arrivals only, not all flights

Cancelled

0.35%

National rate is 1.81%

1 hour+ late

1.0%

National rate is 8.1%

These figures cover 287 flights between July 2025 and June 2026. The median arrival is 15 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 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 255 of the 287 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:00255 flights88.9%

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 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 96.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

UA 2039 next to LAS to LAX

Every carrier on LAS to LAX combined arrived on time 78.8% of the time across 8,325 flights, so UA 2039 is 18 points ahead of it. United flew 1,574 flights on the same city pair under all its flight numbers, including this one, and those ran 86.2% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 18 points.

UA 2039 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2039thin sample	287	96.5%	34 min	0.35%	A+
All United Airlines on LAS–LAX	1,574	86.2%	55 min	0.70%	A+
All carriers on LAS–LAX	8,325	78.8%	60 min	0.70%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	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 202543 flights100.0%
Oct–Dec 202592 flights96.7%
Jan–Mar 202681 flights92.5%
Apr–Jun 202671 flights98.6%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2039 ranged from 94.9% on Sunday to 100.0% on Monday. With about 41 flights behind each day, a spread of 5 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 2039 runs late

One category carries most of the weight here. Carrier accounts for 50% of the 339 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
50%
National Airspace System
35%
Late-arriving aircraft
15%

The largest share of delay minutes, 50%, 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 170 of the 339 delay minutes reported here. The split is drawn from 339 delay minutes reported on UA 2039.

Cancellations are rare at 0.35%, 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 1.0% 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.

The same number turns up on nine other city pairs in the data, including LAX to BZN (56), LAX to ORD (49) and ORD to MCO (48), 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. 287 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: 96.5% on time and 0.35% 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