Flight profile · United Airlines
UA1833
Boston (BOS) to Newark (EWR) · scheduled 6:00 AM – 7:29 AM
How UA1833 performs
635 operations, 2024-08-19 to 2026-06-30.
UA1833 arrived on time 93.2% of the time, against 77.6% for all BOS → EWR flights — this specific departure is 15.6 percentage points better than the route as a whole. Against United Airlines’s own flights on this route it is 15.3 points better.
Source: US DOT Bureau of Transportation Statistics · 635 operations between 2024-08-19 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| UA1833 | 93.2% | 2.20% | -12 min | 2.3% | 635 |
| United Airlines on BOS → EWR | 77.9% | 3.14% | -9 min | 10.1% | 8,178 |
| All BOS → EWR flights | 77.6% | 3.74% | -9 min | 9.9% | 11,901 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-08-19 to 2026-06-30
Other routes UA1833 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 |
|---|---|---|---|
| EWR→CLE Newark to Cleveland | 2026-05-21 – 2026-06-30 | 40 | — |
| EWR→SLC Newark to Salt Lake City | 2026-03-29 – 2026-04-05 | 2 | — |
| PWM→EWR Portland to Newark | 2026-03-29 – 2026-03-29 | 1 | — |
| EWR→PSP Newark to Palm Springs | 2026-03-05 – 2026-03-28 | 24 | — |
| EWR→LAS Newark to Las Vegas | 2026-01-06 – 2026-02-11 | 36 | — |
| EWR→RDU Newark to Raleigh–Durham | 2025-12-18 – 2026-01-05 | 19 | — |
| EWR→EYW Newark to Key West | 2025-10-26 – 2025-12-01 | 37 | — |
| EWR→ATL Newark to Atlanta | 2025-02-13 – 2025-09-24 | 47 | — |
| EWR→BNA Newark to Nashville | 2025-05-22 – 2025-05-31 | 9 | — |
| DEN→EWR Denver to Newark | 2024-08-25 – 2024-08-25 | 1 | — |
| LAX→IAH Los Angeles to Houston | 2024-06-27 – 2024-08-18 | 53 | — |
| IAH→SJU Houston to San Juan | 2023-07-01 – 2024-06-23 | 49 | — |
| EWR→SFO Newark to San Francisco | 2024-03-07 – 2024-03-30 | 24 | — |
| EWR→MCO Newark to Orlando | 2024-02-15 – 2024-03-06 | 21 | — |
| ORD→EWR Chicago to Newark | 2024-01-09 – 2024-02-14 | 37 | — |
| SMF→ORD Sacramento to Chicago | 2023-10-29 – 2024-01-08 | 25 | — |
| MAF→IAH Midland to Houston | 2023-12-01 – 2023-12-20 | 20 | — |
| ORD→BUF Chicago to Buffalo | 2023-10-29 – 2023-11-27 | 29 | — |
| EWR→SAV Newark to Savannah | 2023-10-28 – 2023-10-28 | 1 | — |
| DEN→BOS Denver to Boston | 2023-10-01 – 2023-10-27 | 27 | — |
| IND→ORD Indianapolis to Chicago | 2023-09-29 – 2023-09-29 | 1 | — |
| ORD→SDF Chicago to Louisville | 2023-09-05 – 2023-09-28 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route UA1833 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
10 min late
against a median of 12 min early
Percentiles over 635 operations. Cancelled and diverted flights have no arrival time and are counted separately rather than as very late arrivals.
Why UA1833 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
weather severe enough to stop this flight specifically
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for UA1833 on BOS → EWR. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on BOS → EWR
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| UA570 | United Airlines | 90.5% | 14 min early | 819 |
| YX5718 | Republic Airways | 59.4% | 3 min late | 601 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 635 records of UA1833 operating BOS → EWR, 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.
Full methodology · Report a problem
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