Flight number record
UA 2127
United Airlines · Los Angeles to Newark
- Route
- LAX → EWR
- Departs
- 10:15
- Flights
- 365
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s UA 2127, check with United Airlines.
UA 2127 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 365 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.6%, so UA 2127 runs 6 points behind the country as a whole. Across a thousand flights that is about 55 extra late arrivals.
Key figures
On time
72.1%
Arrivals under 15 minutes late, of 355 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
1.92%
National rate is 1.81%
1 hour+ late
11.3%
National rate is 8.1%
These figures cover 365 flights between July 2025 and June 2026. Beyond the headline rate, 11.3% 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 2127 flies
UA 2127 flies LAX to EWR without a single fixed slot. Its most common scheduled departure was 10:15, used on 152 of 365 flights, with 10:20 (81 flights) and 10:30 (66 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 10:15152 flights41.6%
- Departs 10:2081 flights22.2%
- Departs 10:3066 flights18.1%
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 2127 runs 12 points worse at 72.1%. 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 2127 next to LAX to EWR
Every carrier on LAX to EWR combined arrived on time 79.6% of the time across 4,925 flights, so UA 2127 is 8 points behind it. United flew 3,539 flights on the same city pair under all its flight numbers, including this one, and those ran 78.7% on time. Across its whole network United Airlines managed 79.0%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2127 | 365 | 72.1% | 75 min | 1.92% | C |
| All United Airlines on LAX–EWR | 3,539 | 78.7% | 79 min | 1.92% | B |
| All carriers on LAX–EWR | 4,925 | 79.6% | 76 min | 2.07% | B |
| United Airlines, whole network | 821,041 | 79.0% | 72 min | 1.01% | B |
Across the year
UA 2127 quarter by quarter
UA 2127 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.9% on time and its weakest Jan–Mar 2026 at 61.2%, a swing of 27 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 flights71.6%
- Oct–Dec 202592 flights67.0%
- Jan–Mar 202690 flights61.2%
- Apr–Jun 202691 flights87.9%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, UA 2127 did best on Wednesday at 84.6% on time and worst on Saturday at 59.6%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.
Delay causes
Why UA 2127 runs late
One category carries most of the weight here. National Airspace System accounts for 42% of the 7,451 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.
- 42%National Airspace System
- 29%Carrier
- 29%Late-arriving aircraft
42% 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 3,131 minutes out of 7,451, against a national NAS share of 21%. The split is drawn from 7,451 delay minutes reported on UA 2127.
Cancellations sit at 1.92% against a national 1.81%, which is ordinary. Diversions add another 0.82%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 2,454 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 seven other city pairs in the data, including SFO to LAX (62), SEA to LAX (49) and EWR to IAH (34), but none flew often enough under UA 2127 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to LAX to EWR only.
One caution: this is a thin sample. 365 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 2127
For a booking, UA 2127 is one of the weaker ways to fly LAX to EWR: 8 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 EWR, every carrier and departure
- EWR to LAX, the return direction
- United Airlines 2303 on the same route75.9%
- United Airlines 2397 on the same route88.1%
- United Airlines 2096 on the same route84.8%
- United Airlines 1855 on the same route63.4%
- United Airlines 1981 on the same route72.3%
- United Airlines 2743 on the same route93.5%
- Los Angeles International (LAX) delay statistics
- Newark Liberty International (EWR) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.