Flight profile · United Airlines
UA2423
Newark (EWR) to Santa Ana (SNA) · scheduled 6:30 AM – 9:35 AM
How UA2423 performs
94 operations, 2026-03-29 to 2026-06-30.
UA2423 arrived on time 93.5% of the time, against 85.7% for all EWR → SNA flights — this specific departure is 7.9 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 7.9 points better.
Source: US DOT Bureau of Transportation Statistics · 94 operations between 2026-03-29 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA2423 | 93.5% | 0.00% | -18 min | 2.2% | 94 |
| United Airlines on EWR → SNA | 85.7% | 1.50% | -14 min | 5.1% | 3,276 |
| All EWR → SNA flights | 85.7% | 1.50% | -14 min | 5.1% | 3,276 |
Source: FlyerIntel analysis of US DOT BTS data · 2026-03-29 to 2026-06-30
Other routes UA2423 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MIA→SFO Miami to San Francisco | 2025-02-13 – 2026-03-28 | 352 | 71.8% |
| IAD→MIA Washington to Miami | 2026-02-12 – 2026-03-04 | 21 | — |
| LAS→SFO Las Vegas to San Francisco | 2025-12-02 – 2025-12-17 | 16 | — |
| SFO→BWI San Francisco to Baltimore | 2024-09-26 – 2025-06-25 | 232 | 85.3% |
| XNA→IAH Fayetteville/Springdale/Rogers to Houston | 2025-06-03 – 2025-06-06 | 2 | — |
| ORD→SMF Chicago to Sacramento | 2024-08-18 – 2024-08-18 | 1 | — |
| PIT→IAH Pittsburgh to Houston | 2024-06-27 – 2024-08-16 | 35 | — |
| AUS→IAH Austin to Houston | 2024-08-11 – 2024-08-11 | 1 | — |
| SFO→IND San Francisco to Indianapolis | 2024-06-30 – 2024-06-30 | 1 | — |
| SFO→ONT San Francisco to Ontario | 2024-05-23 – 2024-06-26 | 29 | — |
| DEN→LGA Denver to New York | 2024-05-26 – 2024-05-26 | 1 | — |
| SFO→ORD San Francisco to Chicago | 2023-07-01 – 2024-05-22 | 118 | 72.6% |
| SFO→MCO San Francisco to Orlando | 2024-03-07 – 2024-03-30 | 24 | — |
| SFO→ATL San Francisco to Atlanta | 2023-10-29 – 2024-03-06 | 52 | — |
| LAX→IAH Los Angeles to Houston | 2023-10-01 – 2023-10-28 | 28 | — |
| MSN→ORD Madison to Chicago | 2023-09-29 – 2023-09-30 | 2 | — |
| SFO→PHL San Francisco to Philadelphia | 2023-09-05 – 2023-09-28 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA2423 currently operates. Blending them would produce an average of two different flights.
Why UA2423 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for UA2423 on EWR → SNA. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Data and methodology
Calculated by FlyerIntel from 94 records of UA2423 operating EWR → SNA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.