Flight number record
UA 571
United Airlines · Newark to Houston
- Route
- EWR → IAH
- Departs
- 10:15
- Flights
- 272
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 571, check with United Airlines.
UA 571 lands a B, 3 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 about an hour on average. That is a workable record, not a spotless one. That rests on 272 flights, with a median arrival 13 minutes early.
Key figures
On time
80.8%
Arrivals under 15 minutes late, of 266 completed flights
Avg delay
63 min
Across delayed arrivals only, not all flights
Cancelled
2.21%
National rate is 1.81%
1 hour+ late
7.9%
National rate is 8.1%
These figures cover 272 flights between July 2025 and June 2026. The median arrival is 13 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Schedule
When UA 571 flies
UA 571 flies EWR to IAH without a single fixed slot. Its most common scheduled departure was 10:15, used on 127 of 272 flights, with 10:30 (56 flights) and 09:45 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 10:15127 flights46.7%
- Departs 10:3056 flights20.6%
- Departs 09:4542 flights15.4%
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 10:15 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and UA 571 runs 3 points worse at 80.8%. 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 571 next to EWR to IAH
Every carrier on EWR to IAH combined arrived on time 79.6% of the time across 3,798 flights, so UA 571 is about level with it. United flew 3,534 flights on the same city pair under all its flight numbers, including this one, and those ran 80.4% on time. Across its whole network United Airlines managed 79.0%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 571thin sample | 272 | 80.8% | 63 min | 2.21% | B |
| All United Airlines on EWR–IAH | 3,534 | 80.4% | 74 min | 1.64% | B |
| All carriers on EWR–IAH | 3,798 | 79.6% | 75 min | 2.08% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 571 quarter by quarter
UA 571 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.6% on time and its weakest Oct–Dec 2025 at 72.7%, a swing of 18 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 202586 flights90.6%
- Oct–Dec 202567 flights72.7%
- Jan–Mar 202690 flights73.3%
- Apr–Jun 202629 flights—
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 571 did best on Wednesday at 92.5% on time and worst on Thursday at 64.9%. Each day rests on about 39 flights, so a gap of 28 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 571 runs late
One category carries most of the weight here. Carrier accounts for 49% of the 3,212 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.
- 49%Carrier
- 35%Late-arriving aircraft
- 14%National Airspace System
- 2%Extreme weather
35% 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 3,212 reported delay minutes here, that single category outweighs weather by 20 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 3,212 delay minutes reported on UA 571.
Cancellations sit at 2.21% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.9% 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 about an hour, which a normal layover absorbs.
The 1,400 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 six other city pairs in the data, including SFO to SNA (41), ATL to SFO (41) and ORD to EWR (31), but none flew often enough under UA 571 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to IAH only.
One caution: this is a thin sample. 272 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 571
For a booking, read UA 571 as 80.8% on time with 2.21% cancelled over 272 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- EWR to IAH, every carrier and departure
- IAH to EWR, the return direction
- United Airlines 2425 on the same route74.1%
- United Airlines 492 on the same route92.0%
- United Airlines 2674 on the same route69.5%
- United Airlines 2438 on the same route93.5%
- Newark Liberty International (EWR) delay statistics
- George Bush Intercontinental (IAH) 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.