Flight number record
UA 2487
United Airlines · Los Angeles to Chicago
- Route
- LAX → ORD
- Departs
- 14:15
- Flights
- 364
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 55 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 77.3%, so UA 2487 runs 12 points behind the country as a whole. Across a thousand flights that is about 123 extra late arrivals.
Key figures
On time
65.0%
Arrivals under 15 minutes late, of 357 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.82%
National rate is 1.89%
1 hour+ late
10.1%
National rate is 8.3%
These figures cover 364 flights between September 2025 and August 2026. Beyond the headline rate, 10.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 104 of 364 flights, with 14:10 (67 flights) and 14:26 (41 flights) next.
- Departs 14:15104 flights28.6%
- Departs 14:1067 flights18.4%
- Departs 14:2641 flights11.3%
Scale runs 0% to 100%.
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 71.9%, and UA 2487 runs 7 points worse at 65.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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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 7,119 flights, so UA 2487 is 11 points behind it. United flew 3,414 flights on the same city pair under all its flight numbers, including this one, and those ran 79.9% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2487thin sample | 364 | 65.0% | 54 min | 0.82% | C+ |
| All United Airlines on LAX–ORD | 3,414 | 79.9% | 69 min | 0.70% | B+ |
| All carriers on LAX–ORD | 7,119 | 76.4% | 84 min | 1.39% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | 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 Jul–Sep 2026 at 57.6%, a swing of 14 points on roughly 73 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 202530 flights66.7%
- Oct–Dec 202591 flights60.0%
- Jan–Mar 202690 flights71.6%
- Apr–Jun 202691 flights67.8%
- Jul–Sep 202662 flights57.6%
Scale runs 50% to 75%.
By weekday, UA 2487 did best on Saturday at 76.5% on time and worst on Thursday at 54.9%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2487 runs when it is late
The 125 late arrivals split 58 under half an hour, 31 between 30 and 60 minutes, and 36 an hour or more.
- 15+ min early33 flights9.2%
- Within 15 min199 flights55.7%
- 15–29 min late58 flights16.2%
- 30–59 min late31 flights8.7%
- 1–2 hours late23 flights6.4%
- 2+ hours late13 flights3.6%
Scale runs 0% to 100%.
Share of 357 completed flights by arrival against schedule.
11 of 76 late departures made up the time and arrived on time, 14% of them. In the other direction, 60 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at ORD.
The worst days
Worst days for UA 2487
The latest arrival of the period was on 3 July 2026, 4 hours 34 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 July 2026 | 4 hours 34 minutes | National Airspace System |
| 11 June 2026 | 3 hours 56 minutes | National Airspace System |
| 2 April 2026 | 3 hours 11 minutes | National Airspace System |
| 18 July 2026 | 3 hours 10 minutes | National Airspace System |
| 30 January 2026 | 3 hours 7 minutes | National Airspace System |
Delay causes
Why UA 2487 runs late
National Airspace System accounts for 59% of the 6,711 delay minutes carriers reported here, and the remaining four split what is left.
- 59%National Airspace System
- 30%Late-arriving aircraft
- 11%Carrier
59% 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 3,992 minutes out of 6,711, against a national NAS share of 21%. The split is drawn from 6,711 delay minutes reported on UA 2487.
Cancellations are rare at 0.82%, below the national 1.89% 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
10.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
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 PHX to LAX (82), ORD to PHL (64) and SFO to LAX (31), 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: 11 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.
Related
Where to go next
- LAX to ORD, every carrier and departure
- ORD to LAX, the return direction
- United Airlines 1946 on the same route84.5%
- United Airlines 2113 on the same route77.8%
- United Airlines 212 on the same route86.4%
- United Airlines 1941 on the same route88.2%
- Los Angeles International (LAX) delay statistics
- Chicago O'Hare International (ORD) delay statistics
- United Airlines on-time record
- Every United Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.