Flight number record
UA 353
United Airlines · Newark to Los Angeles
- Route
- EWR → LAX
- Departs
- 18:45
- Flights
- 273
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s UA 353, check with United Airlines.
UA 353 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 273 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.3%, so UA 353 runs 11 points behind the country as a whole. Across a thousand flights that is about 109 extra late arrivals.
Key figures
On time
66.4%
Arrivals under 15 minutes late, of 268 completed flights
Avg delay
112 min
Across delayed arrivals only, not all flights
Cancelled
1.83%
National rate is 1.89%
1 hour+ late
17.2%
National rate is 8.3%
These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 17.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When UA 353 flies
UA 353 flies EWR to LAX without a single fixed slot. Its most common scheduled departure was 18:45, used on 103 of 273 flights, with 19:30 (83 flights) and 18:30 (53 flights) next.
- Departs 18:45103 flights37.7%
- Departs 19:3083 flights30.4%
- Departs 18:3053 flights19.4%
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 18:45 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and UA 353 runs level with that at 66.4%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
UA 353 next to EWR to LAX
Every carrier on EWR to LAX combined arrived on time 70.7% of the time across 4,750 flights, so UA 353 is 4 points behind it. United flew 3,527 flights on the same city pair under all its flight numbers, including this one, and those ran 71.0% on time. Across its whole network United Airlines managed 78.8%, which this flight trails by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| UA 353thin sample | 273 | 66.4% | 112 min | 1.83% | C |
| All United Airlines on EWR–LAX | 3,527 | 71.0% | 84 min | 1.93% | C |
| All carriers on EWR–LAX | 4,750 | 70.7% | 82 min | 2.46% | C |
| United Airlines, whole network | 830,825 | 78.8% | 73 min | 1.02% | B |
Across the year
UA 353 quarter by quarter
UA 353 did not run the same all year. Its best quarter was Jan–Mar 2026 at 76.5% on time and its weakest Jul–Sep 2026 at 53.3%, a swing of 23 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.
- Oct–Dec 202567 flights62.7%
- Jan–Mar 202653 flights76.5%
- Apr–Jun 202691 flights72.2%
- Jul–Sep 202662 flights53.3%
Scale runs 45% to 80%.
By weekday, UA 353 did best on Monday at 74.4% on time and worst on Thursday at 59.5%. Each day rests on about 39 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late UA 353 runs when it is late
UA 353 often beats the schedule: 78 of 268 completed flights, 29%, arrived 15 minutes or more early. When UA 353 is late it tends to be very late: 46 of its 90 late arrivals were an hour or more behind, and 27 were two hours or more.
- 15+ min early78 flights29.1%
- Within 15 min100 flights37.3%
- 15–29 min late27 flights10.1%
- 30–59 min late17 flights6.3%
- 1–2 hours late19 flights7.1%
- 2+ hours late27 flights10.1%
Scale runs 0% to 100%.
Share of 268 completed flights by arrival against schedule.
16 of 77 late departures made up the time and arrived on time, 21% of them. In the other direction, 29 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 LAX.
The worst days
Worst days for UA 353
The latest arrival of the period was on 6 August 2026, 15 hours 39 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 August 2026 | 15 hours 39 minutes | Late-arriving aircraft |
| 16 August 2026 | 14 hours 44 minutes | Carrier |
| 30 August 2026 | 7 hours 44 minutes | Late-arriving aircraft |
| 4 November 2025 | 6 hours 19 minutes | Carrier |
| 20 July 2026 | 5 hours 45 minutes | Late-arriving aircraft |
Delay causes
Why UA 353 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 10,000 reported delay minutes.
- 41%Late-arriving aircraft
- 36%Carrier
- 22%National Airspace System
- 0%Extreme weather
41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 41 to one. The split is drawn from 10,070 delay minutes reported on UA 353.
Cancellations sit at 1.83% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
17.2% 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.
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 nine other city pairs in the data, including PBI to EWR (184), LAX to ORD (155) and EWR to DEN (26), but none flew often enough under UA 353 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to LAX only.
One caution: this is a thin sample. 273 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 353
For a booking, UA 353 is a flight to put a long connection behind. 17.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- EWR to LAX, every carrier and departure
- LAX to EWR, the return direction
- United Airlines 2679 on the same route76.7%
- United Airlines 2238 on the same route69.1%
- United Airlines 2434 on the same route78.7%
- United Airlines 2641 on the same route70.1%
- United Airlines 2191 on the same route74.1%
- Alaska Airlines 287 on the same route73.2%
- Newark Liberty International (EWR) delay statistics
- Los Angeles International (LAX) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.