UA1833

UA1833 arrived on time 92.7% of the time, against 77.3% for all BOS → EWR flights, so this departure is 15.4 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 14.9 points better.

Source: US DOT Bureau of Transportation Statistics · 662 operations, August 2024 – July 2026 · If UA1833 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.

This flight runs unusually far ahead of the BOS → EWR route as a whole, better than 98% of 11,788 comparable flight numbers.

92.7% on time for this specific departure, against 77.3% for every BOS → EWR flight.

Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.

UA1833 has cancelled 2.11% of its scheduled departures (14 of 662), against 3.85% for all BOS → EWR flights — this specific departure cancels 1.7 percentage points less often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about UA1833 specifically, not about the route it flies.

Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026

Share of the delay minutes US DOT attributed to each cause for UA1833 on BOS → EWR. Only delays of 15 minutes or more are attributed.

Source: US DOT Bureau of Transportation Statistics · Data covering August 2024 – July 2026

UA1833 is usually the aircraft’s first flight of the day: the schedule gives it a median of 7.8 hours on the ground at BOS, so its “inbound” is mostly the aircraft’s arrival the evening before.

When the aircraft came in 15 or more minutes late, UA1833 pushed back an average of 2 minutes late; when it came in on time or early, an average of 3 minutes early.

Each departure is matched to the flight the same aircraft flew into BOS just before it, using the tail number in the DOT file, 628 of 650 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.

Source: US DOT Bureau of Transportation Statistics · Data covering August 2024 – July 2026

UA1833 pushes back an average of 1.6 minutes early and reaches the gate at EWR an average of 6.3 minutes early. The 4.6 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 20.3 minutes on the taxiways at BOS is about what any departure from the airport in that hour spends.

On arrival at EWR, UA1833 spends 9.8 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at EWR spends on the ground before reaching the gate.

Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached EWR. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 36,667 departures from BOS scheduled in the clock hour UA1833 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at EWR (387,854 flights), not just UA1833’s own. More on taxi time.

Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026

UA1833 is scheduled out of BOS at 6:00 AM, in the 6 AM–7 AM bank. Departures from BOS in that hour arrive on time 88.8% of the time against 77.2% across the airport’s whole day — the slot alone is worth 11.6 points better before anything about this particular flight is considered.

The two airport figures cover every departure from BOS to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.

Source: FlyerIntel analysis of US DOT BTS data · August 2024 – July 2026 · Hours below 120 departures are not scored.

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.

Source: US DOT Bureau of Transportation Statistics · Data covering August 2024 – July 2026

Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1833 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.

• UA570 BOS→EWR United Airlines on the same route, departs 7:00 AM, on time 90.3%
• YX5718 BOS→EWR Republic Airways on the same route, departs 6:15 PM, on time 58.7%
• UA647 BOS→DEN United Airlines flight out of BOS, BOS to DEN, departs 7:30 AM, on time 89.2%
• UA1997 IAD→EWR United Airlines flight into EWR, IAD to EWR, departs 10:30 PM, on time 63.7%