Carrier route record

UALAS→EWR

United Airlines · Las Vegas to Newark

Flights: 2,478
Period: July 2025 to June 2026
Share of route: 83%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.

United on LAS to EWR lands a B, 4 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 2,478 flights, with a median arrival 13 minutes early.

Set against the rest of the country, United's LAS to EWR record is 4 points better than the US average of 77.6%. That gap is worth roughly 44 fewer late arrivals for every thousand flights.

On time

82.0%

Arrivals under 15 minutes late, of 2,426 completed flights

Avg delay

83 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

Whole route

81.4%

Every carrier on LAS to EWR, 2,990 flights

These figures cover 2,478 flights between July 2025 and June 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Carrier by carrier

United against every carrier on LAS to EWR

United flew 2,478 of the 2,990 flights on LAS to EWR, most of the route. Its 82.0% on time is about level with the route as a whole at 81.4%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from United at 82.0% to Spirit at 77.6%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on LAS to EWR
Airline	Flights	On time	Avg delay	Cancelled	Grade
United Airlines (this page)	2,478	82.0%	83 min	1.37%	B
JetBlue Airwaysthin sample	311	78.8%	71 min	2.57%	B
Spirit Airlinesthin sample	201	77.6%	69 min	2.99%	B

Flight by flight

United flight numbers on LAS to EWR

UA 40623:4585.1% · 322 flights

Departure window

When United runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am331 flights93.6%
8am–11am427 flights84.4%
11am–2pm413 flights70.8%
2pm–5pm632 flights76.5%
5pm–8pm25 flights—
8pm–5am650 flights86.7%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 70.8% on time against 93.6% for 5am–8am. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8pm–5am window is the busiest, with 650 flights scheduled in it.

Across the year

United on LAS to EWR through the year

Darker means more delays. Figures are on-time percentages.February best, July worst

Delays peak in October, when the on-time rate falls to 72.9%. February is the strongest month at 90.6%. Moving a flexible trip across that boundary buys 18 points. November was the busiest month here, with 227 flights.

Across the week, Tuesday is the strongest day at 87.5% on time and Thursday the weakest at 75.4%. 12 points is a smaller lever than departure hour, but it is free.

Delay causes

Why United runs late on this route

One category carries most of the weight here. National Airspace System accounts for 53% of the 36,000 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.

National Airspace System
53%
Late-arriving aircraft
27%
Carrier
17%
Extreme weather
3%

53% 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 19,000 minutes out of 36,000, against a national NAS share of 21%. The split is drawn from 36,273 reported delay minutes.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.73%.

Connections and stage length

What a delay here costs

8.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.

At 2,227 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 return leg runs 81.0% on time across 2,478 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

The sample behind these figures is 2,478 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

What to do with this

Booking United on LAS to EWR

Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 90.6% on time and October 72.9%, a swing of 18 points. If the dates move at all, move them out of October before you think about anything else. 2,426 completed flights over 12 months sit behind that.

Where to go next

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