Flight number record
UA 2303
United Airlines · Los Angeles to Newark
- Route
- LAX → EWR
- Departs
- 23:15
- Flights
- 365
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 2303, check with United Airlines.
UA 2303 sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 365 flights, with a median arrival 4 minutes early.
Key figures
On time
75.7%
Arrivals under 15 minutes late, of 358 completed flights
Avg delay
58 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.89%
1 hour+ late
8.1%
National rate is 8.3%
These figures cover 365 flights between September 2025 and August 2026. Beyond the headline rate, 8.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When UA 2303 flies
UA 2303 flies LAX to EWR without a single fixed slot. Its most common scheduled departure was 23:15, used on 124 of 365 flights, with 23:00 (75 flights) and 23:59 (51 flights) next.
- Departs 23:15124 flights34.0%
- Departs 23:0075 flights20.5%
- Departs 23:5951 flights14.0%
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 23:15 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and UA 2303 runs 6 points better at 75.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
UA 2303 next to LAX to EWR
Every carrier on LAX to EWR combined arrived on time 79.1% of the time across 4,748 flights, so UA 2303 is 3 points behind it. United flew 3,526 flights on the same city pair under all its flight numbers, including this one, and those ran 77.7% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 2303 | 365 | 75.7% | 58 min | 1.64% | B |
| All United Airlines on LAX–EWR | 3,526 | 77.7% | 77 min | 1.76% | B |
| All carriers on LAX–EWR | 4,748 | 79.1% | 75 min | 2.11% | B |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 2303 quarter by quarter
UA 2303 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Oct–Dec 2025 at 63.7%, a swing of 26 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 flights90.0%
- Oct–Dec 202592 flights63.7%
- Jan–Mar 202690 flights70.1%
- Apr–Jun 202691 flights85.6%
- Jul–Sep 202662 flights80.0%
Scale runs 55% to 95%.
By weekday, UA 2303 did best on Wednesday at 86.3% on time and worst on Monday at 71.2%. Each day rests on about 52 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 2303 runs when it is late
UA 2303 often beats the schedule: 90 of 358 completed flights, 25%, arrived 15 minutes or more early. The 87 late arrivals split 30 under half an hour, 28 between 30 and 60 minutes, and 29 an hour or more.
- 15+ min early90 flights25.1%
- Within 15 min181 flights50.6%
- 15–29 min late30 flights8.4%
- 30–59 min late28 flights7.8%
- 1–2 hours late20 flights5.6%
- 2+ hours late9 flights2.5%
Scale runs 0% to 100%.
Share of 358 completed flights by arrival against schedule.
A late pushback is often recovered here: of 109 departures that left 15 minutes late or more, 40 still arrived on time. In the other direction, 18 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 EWR.
The worst days
Worst days for UA 2303
The latest arrival of the period was on 5 February 2026, 4 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 5 February 2026 | 4 hours | Carrier |
| 8 November 2025 | 3 hours 10 minutes | Late-arriving aircraft |
| 24 February 2026 | 3 hours 7 minutes | Carrier |
| 13 December 2025 | 2 hours 56 minutes | National Airspace System |
| 2 November 2025 | 2 hours 52 minutes | Carrier |
Delay causes
Why UA 2303 runs late
Carrier accounts for 55% of the 5,029 delay minutes carriers reported here, and the remaining four split what is left.
- 55%Carrier
- 25%Late-arriving aircraft
- 17%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 55%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,752 of the 5,029 delay minutes reported here. The split is drawn from 5,029 delay minutes reported on UA 2303.
Cancellations sit at 1.64% against a national 1.89%, which is ordinary. Diversions add another 0.27%.
Connections and routes
What a delay on this flight costs
8.1% of arrivals land an hour or more late, close to the national 8.3%, so 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.
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 one other city pair in the data, including SFO to LAX (21), but none flew often enough under UA 2303 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 2303
For a booking, read UA 2303 as 75.7% on time with 1.64% cancelled over 365 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- LAX to EWR, every carrier and departure
- EWR to LAX, the return direction
- United Airlines 2127 on the same route73.4%
- United Airlines 2096 on the same route79.9%
- United Airlines 2743 on the same route93.5%
- United Airlines 2397 on the same route87.5%
- United Airlines 1855 on the same route62.3%
- United Airlines 1981 on the same route68.5%
- 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
- Worst months to fly in the US, ranked by the data
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.