UA623

UA623 arrived on time 86.9% of the time, against 75.0% for all LGA → ORD flights, so this departure is 11.9 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 11.0 points better.

Source: US DOT Bureau of Transportation Statistics · 971 operations, July 2023 – July 2026 · If UA623 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 LGA → ORD route as a whole, better than 94% of 11,788 comparable flight numbers.

86.9% on time for this specific departure, against 75.0% for every LGA → ORD flight.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – 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.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026

Share of the delay minutes US DOT attributed to each cause for UA623 on LGA → ORD. Only delays of 15 minutes or more are attributed.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

UA623 is usually the aircraft’s first flight of the day: the schedule gives it a median of 11.4 hours on the ground at LGA, so its “inbound” is mostly the aircraft’s arrival the evening before.

When the aircraft came in 15 or more minutes late, UA623 pushed back an average of 1 minute late; when it came in on time or early, an average of 1 minute late.

Each departure is matched to the flight the same aircraft flew into LGA just before it, using the tail number in the DOT file, 452 of 943 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 July 2023 – July 2026

UA623 pushes back an average of 3.5 minutes late and reaches the gate at ORD an average of 2.7 minutes early. The 6.2 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 25.1 minutes on the taxiways at LGA is about what any departure from the airport in that hour spends.

On arrival at ORD, UA623 spends 15.2 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 2.6 minutes shorter than a typical ORD arrival (17.8 min).

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 ORD. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 31,853 departures from LGA scheduled in the clock hour UA623 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at ORD (952,666 flights), not just UA623’s own. More on taxi time.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026

UA623 is scheduled out of LGA at 9:15 AM, in the 9 AM–10 AM bank. Departures from LGA in that hour arrive on time 85.1% of the time against 78.3% across the airport’s whole day — the slot alone is worth 6.9 points better before anything about this particular flight is considered.

The two airport figures cover every departure from LGA 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 · July 2023 – July 2026 · Hours below 120 departures are not scored.

Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.

Because the same number has served different journeys, the statistics above describe only the route UA623 currently operates. Blending them would produce an average of two different flights.

Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026

Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA623 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.

• UA1310 LGA→ORD United Airlines on the same route, departs 10:25 AM, on time 86.5%
• UA2389 LGA→ORD United Airlines on the same route, departs 6:10 AM, on time 93.5%
• UA219 ORD→HNL United Airlines flight out of ORD, ORD to HNL, departs 9:30 AM, on time 84.9%