Flight number record

UA 2146

United Airlines · Los Angeles to Denver

Route: LAX → DEN
Departs: 16:10
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2146, check with United Airlines.

UA 2146 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 362 flights, with a median arrival 2 minutes early.

On time

75.3%

Arrivals under 15 minutes late, of 361 completed flights

Avg delay

63 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

8.9%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. Beyond the headline rate, 8.9% 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.

Schedule

When UA 2146 flies

UA 2146 flies LAX to DEN without a single fixed slot. Its most common scheduled departure was 16:10, used on 169 of 362 flights, with 16:13 (140 flights) and 16:15 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:10169 flights46.7%
Departs 16:13140 flights38.7%
Departs 16:1553 flights14.6%

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 16:10 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2146 runs 3 points better at 75.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2146 next to LAX to DEN

Every carrier on LAX to DEN combined arrived on time 81.7% of the time across 7,721 flights, so UA 2146 is 6 points behind it. United flew 3,067 flights on the same city pair under all its flight numbers, including this one, and those ran 87.1% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 4 points.

UA 2146 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2146thin sample	362	75.3%	63 min	0.00%	B+
All United Airlines on LAX–DEN	3,067	87.1%	68 min	0.10%	A+
All carriers on LAX–DEN	7,721	81.7%	65 min	0.51%	B+
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2146 quarter by quarter

UA 2146 did not run the same all year. Its best quarter was Apr–Jun 2026 at 85.7% on time and its weakest Jul–Sep 2025 at 51.1%, a swing of 35 points on roughly 91 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 202590 flights51.1%
Oct–Dec 202591 flights80.0%
Jan–Mar 202690 flights84.4%
Apr–Jun 202691 flights85.7%

Scale runs 45% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2146 ranged from 73.1% on Sunday to 78.8% on Wednesday. With about 52 flights behind each day, a spread of 6 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why UA 2146 runs late

One category carries most of the weight here. National Airspace System accounts for 56% of the 5,581 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
56%
Late-arriving aircraft
23%
Carrier
14%
Extreme weather
6%

56% 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 3,115 minutes out of 5,581, against a national NAS share of 21%. The split is drawn from 5,581 delay minutes reported on UA 2146.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

8.9% 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 about an hour, which a normal layover absorbs.

The 862 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 362 flights under UA 2146 in the data flew LAX to DEN. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 362 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 2146

For a booking, UA 2146 is one of the weaker ways to fly LAX to DEN: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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