Flight number record

UA 2487

United Airlines · Los Angeles to Chicago

Route: LAX → ORD
Departs: 14:15
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2487, check with United Airlines.

UA 2487 draws a C+. About one flight in three arrives at least 15 minutes late, and the typical late arrival is roughly 50 minutes behind schedule. Build slack into anything you connect to. That rests on 364 flights, with a median arrival 4 minutes late.

The national on-time rate over the same period is 77.6%, so UA 2487 runs 11 points behind the country as a whole. Across a thousand flights that is about 105 extra late arrivals.

On time

67.1%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

0.55%

National rate is 1.81%

1 hour+ late

7.2%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.

Schedule

When UA 2487 flies

UA 2487 flies LAX to ORD without a single fixed slot. Its most common scheduled departure was 14:15, used on 83 of 364 flights, with 14:10 (80 flights) and 14:01 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 14:1583 flights22.8%
Departs 14:1080 flights22.0%
Departs 14:0149 flights13.5%

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 14:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and UA 2487 runs 5 points worse at 67.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

UA 2487 next to LAX to ORD

Every carrier on LAX to ORD combined arrived on time 76.4% of the time across 6,964 flights, so UA 2487 is 9 points behind it. United flew 3,380 flights on the same city pair under all its flight numbers, including this one, and those ran 80.5% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 12 points.

UA 2487 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
UA 2487thin sample	364	67.1%	48 min	0.55%	C+
All United Airlines on LAX–ORD	3,380	80.5%	67 min	0.74%	B+
All carriers on LAX–ORD	6,964	76.4%	86 min	1.68%	B
United Airlines, whole network	821,041	79.0%	72 min	1.01%	B

Across the year

UA 2487 quarter by quarter

UA 2487 did not run the same all year. Its best quarter was Jan–Mar 2026 at 71.6% on time and its weakest Oct–Dec 2025 at 60.0%, a swing of 12 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 202592 flights69.2%
Oct–Dec 202591 flights60.0%
Jan–Mar 202690 flights71.6%
Apr–Jun 202691 flights67.8%

Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, UA 2487 did best on Tuesday at 75.0% on time and worst on Sunday at 59.6%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why UA 2487 runs late

One category carries most of the weight here. National Airspace System accounts for 63% of the 5,606 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
63%
Late-arriving aircraft
23%
Carrier
10%
Extreme weather
4%

63% 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 3,511 minutes out of 5,606, against a national NAS share of 21%. The split is drawn from 5,606 delay minutes reported on UA 2487.

Cancellations are rare at 0.55%, 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

7.2% 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 roughly 50 minutes, which a normal layover absorbs.

At 1,744 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 four other city pairs in the data, including ORD to PHL (108), SFO to LAX (80) and PHX to LAX (41), but none flew often enough under UA 2487 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to ORD only.

One caution: this is a thin sample. 364 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 2487

For a booking, UA 2487 is one of the weaker ways to fly LAX to ORD: 9 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