Flight number record

UA 1855

United Airlines · Los Angeles to Newark

Route: LAX → EWR
Departs: 13:30
Flights: 327
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1855, check with United Airlines.

UA 1855 draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 327 flights, with a median arrival 3 minutes late.

The national on-time rate over the same period is 77.6%, so UA 1855 runs 14 points behind the country as a whole. Across a thousand flights that is about 142 extra late arrivals.

On time

63.4%

Arrivals under 15 minutes late, of 320 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

1.53%

National rate is 1.81%

1 hour+ late

13.4%

National rate is 8.1%

These figures cover 327 flights between July 2025 and June 2026. Beyond the headline rate, 13.4% 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.

Schedule

When UA 1855 flies

UA 1855 flies LAX to EWR without a single fixed slot. Its most common scheduled departure was 13:30, used on 80 of 327 flights, with 13:25 (80 flights) and 13:15 (69 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:3080 flights24.5%
Departs 13:2580 flights24.5%
Departs 13:1569 flights21.1%

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 13:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and UA 1855 runs 15 points worse at 63.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 1855 next to LAX to EWR

Every carrier on LAX to EWR combined arrived on time 79.6% of the time across 4,925 flights, so UA 1855 is 16 points behind it. United flew 3,539 flights on the same city pair under all its flight numbers, including this one, and those ran 78.7% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 16 points.

UA 1855 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 1855thin sample	327	63.4%	72 min	1.53%	D
All United Airlines on LAX–EWR	3,539	78.7%	79 min	1.92%	B
All carriers on LAX–EWR	4,925	79.6%	76 min	2.07%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 1855 quarter by quarter

UA 1855 did not run the same all year. Its best quarter was Apr–Jun 2026 at 76.4% on time and its weakest Jan–Mar 2026 at 51.8%, a swing of 25 points on roughly 82 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 202555 flights57.4%
Oct–Dec 202592 flights65.2%
Jan–Mar 202689 flights51.8%
Apr–Jun 202691 flights76.4%

Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, UA 1855 did best on Tuesday at 78.3% on time and worst on Sunday at 40.0%. Each day rests on about 47 flights, so a gap of 38 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 1855 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 8,462 reported delay minutes.

National Airspace System
42%
Late-arriving aircraft
36%
Carrier
22%
Extreme weather
0%

36% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 8,462 reported delay minutes here, that single category outweighs weather by 36 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 8,462 delay minutes reported on UA 1855.

Cancellations sit at 1.53% against a national 1.81%, which is ordinary. Diversions add another 0.61%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 2,454 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 same number turns up on one other city pair in the data, including IAD to LAX (37), but none flew often enough under UA 1855 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to EWR only.

One caution: this is a thin sample. 327 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 1855

For a booking, UA 1855 is a flight to put a long connection behind. 13.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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