Flight number record
UA 1525
United Airlines · Newark to Chicago
- Route
- EWR → ORD
- Departs
- 10:24
- Flights
- 340
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 1525, check with United Airlines.
UA 1525 lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 340 flights, with a median arrival 10 minutes early.
Key figures
On time
79.8%
Arrivals under 15 minutes late, of 337 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
0.88%
National rate is 1.81%
1 hour+ late
8.6%
National rate is 8.1%
These figures cover 340 flights between July 2025 and June 2026. Beyond the headline rate, 8.6% 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 1525 flies
UA 1525 flies EWR to ORD without a single fixed slot. Its most common scheduled departure was 10:24, used on 62 of 340 flights, with 10:15 (61 flights) and 10:20 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 10:2462 flights18.2%
- Departs 10:1561 flights17.9%
- Departs 10:2043 flights12.6%
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 10:24 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 1525 runs 4 points worse at 79.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
UA 1525 next to EWR to ORD
Every carrier on EWR to ORD combined arrived on time 71.5% of the time across 6,039 flights, so UA 1525 is 8 points ahead of it. United flew 4,389 flights on the same city pair under all its flight numbers, including this one, and those ran 71.1% on time. Across its whole network United Airlines managed 79.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1525thin sample | 340 | 79.8% | 74 min | 0.88% | B+ |
| All United Airlines on EWR–ORD | 4,389 | 71.1% | 76 min | 2.26% | C |
| All carriers on EWR–ORD | 6,039 | 71.5% | 81 min | 3.33% | C− |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 1525 quarter by quarter
UA 1525 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.2% on time and its weakest Oct–Dec 2025 at 58.7%, a swing of 32 points on roughly 85 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 flights90.2%
- Oct–Dec 202592 flights58.7%
- Jan–Mar 202665 flights82.5%
- Apr–Jun 202691 flights88.9%
Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 1525 did best on Monday at 91.7% on time and worst on Sunday at 68.8%. Each day rests on about 49 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 1525 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 5,047 reported delay minutes.
- 38%Late-arriving aircraft
- 33%National Airspace System
- 29%Carrier
- 1%Extreme weather
38% 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 5,047 reported delay minutes here, that single category outweighs weather by 38 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 5,047 delay minutes reported on UA 1525.
Cancellations are rare at 0.88%, 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
8.6% 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 a little over an hour, which a normal layover absorbs.
The 719 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.
The same number turns up on ten other city pairs in the data, including ORD to AUS (117), ORF to EWR (92) and RDU to EWR (72), but none flew often enough under UA 1525 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to ORD only.
One caution: this is a thin sample. 340 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 1525
For a booking, read UA 1525 as 79.8% on time with 0.88% cancelled over 340 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- EWR to ORD, every carrier and departure
- ORD to EWR, the return direction
- United Airlines 1875 on the same route77.4%
- United Airlines 546 on the same route70.4%
- United Airlines 661 on the same route50.2%
- United Airlines 254 on the same route40.1%
- United Airlines 2164 on the same route85.4%
- Newark Liberty International (EWR) 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
- Why the first flight of the morning is statistically safest
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.