Flight number record
UA 1525
United Airlines · Newark to Chicago
- Route
- EWR → ORD
- Departs
- 10:24
- Flights
- 340
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 1525, check with United Airlines.
UA 1525 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 340 flights, with a median arrival 10 minutes early.
Key figures
On time
77.1%
Arrivals under 15 minutes late, of 336 completed flights
Avg delay
90 min
Across delayed arrivals only, not all flights
Cancelled
0.88%
National rate is 1.89%
1 hour+ late
10.7%
National rate is 8.3%
These figures cover 340 flights between September 2025 and August 2026. Beyond the headline rate, 10.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 103 of 340 flights, with 10:15 (61 flights) and 10:00 (35 flights) next.
- Departs 10:24103 flights30.3%
- Departs 10:1561 flights17.9%
- Departs 10:0035 flights10.3%
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 10:24 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and UA 1525 runs 7 points worse at 77.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
UA 1525 next to EWR to ORD
Every carrier on EWR to ORD combined arrived on time 70.7% of the time across 6,123 flights, so UA 1525 is 6 points ahead of it. United flew 4,415 flights on the same city pair under all its flight numbers, including this one, and those ran 70.3% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 1525thin sample | 340 | 77.1% | 90 min | 0.88% | B+ |
| All United Airlines on EWR–ORD | 4,415 | 70.3% | 80 min | 2.83% | C |
| All carriers on EWR–ORD | 6,123 | 70.7% | 85 min | 3.90% | C− |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | 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 93.3% on time and its weakest Oct–Dec 2025 at 58.7%, a swing of 35 points on roughly 68 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 flights93.3%
- Oct–Dec 202592 flights58.7%
- Jan–Mar 202665 flights82.5%
- Apr–Jun 202691 flights88.9%
- Jul–Sep 202662 flights73.8%
Scale runs 50% to 100%.
By weekday, UA 1525 did best on Monday at 87.8% on time and worst on Sunday at 62.5%. Each day rests on about 49 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 1525 runs when it is late
UA 1525 often beats the schedule: 132 of 336 completed flights, 39%, arrived 15 minutes or more early. The 77 late arrivals split 22 under half an hour, 19 between 30 and 60 minutes, and 36 an hour or more.
- 15+ min early132 flights39.3%
- Within 15 min127 flights37.8%
- 15–29 min late22 flights6.5%
- 30–59 min late19 flights5.7%
- 1–2 hours late19 flights5.7%
- 2+ hours late17 flights5.1%
Scale runs 0% to 100%.
Share of 336 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 61 departures that left 15 minutes late or more, only 7 made it up before arrival. In the other direction, 23 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 1525
The latest arrival of the period was on 21 July 2026, 9 hours behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 9 hours | Extreme weather |
| 18 July 2026 | 7 hours 33 minutes | Extreme weather |
| 13 March 2026 | 7 hours 26 minutes | Late-arriving aircraft |
| 15 December 2025 | 5 hours 33 minutes | Late-arriving aircraft |
| 16 April 2026 | 4 hours 55 minutes | Late-arriving aircraft |
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 6,964 reported delay minutes.
- 33%National Airspace System
- 32%Late-arriving aircraft
- 23%Carrier
- 12%Extreme weather
Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 6,964 delay minutes reported on UA 1525.
Cancellations are rare at 0.88%, 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
10.7% 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.
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.
The same number turns up on ten other city pairs in the data, including RDU to EWR (134), ORD to AUS (55) and PBI to EWR (50), 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 77.1% 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 661 on the same route47.6%
- United Airlines 1875 on the same route77.7%
- United Airlines 546 on the same route66.6%
- United Airlines 254 on the same route43.5%
- 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
- 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.