UA1799

UA1799 arrived on time 86.5% of the time, against 79.8% for all IAH → LAS flights, so this departure is 6.7 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 5.2 points better.

Source: US DOT Bureau of Transportation Statistics · 674 operations, September 2024 – July 2026 · If UA1799 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.

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

Share of the delay minutes US DOT attributed to each cause for UA1799 on IAH → LAS. Only delays of 15 minutes or more are attributed.

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

The aircraft flying UA1799 came in 15 or more minutes late on 12% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.

Each departure is matched to the flight the same aircraft flew into IAH just before it, using the tail number in the DOT file, 491 of 669 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 September 2024 – July 2026

UA1799 pushes back an average of 5.4 minutes late and reaches the gate at LAS an average of 3.3 minutes early. The 8.7 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 22.0 minutes on the taxiways at IAH is about what any departure from the airport in that hour spends.

On arrival at LAS, UA1799 spends 8.8 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 1.1 minutes longer than a typical LAS arrival (7.7 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 LAS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 27,050 departures from IAH scheduled in the clock hour UA1799 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at LAS (569,643 flights), not just UA1799’s own. More on taxi time.

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

UA1799 is scheduled out of IAH at 9:45 AM, in the 9 AM–10 AM bank. Departures from IAH in that hour arrive on time 82.7% of the time against 77.4% across the airport’s whole day — the slot alone is worth 5.3 points better before anything about this particular flight is considered.

The two airport figures cover every departure from IAH 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 · September 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 UA1799 currently operates. Blending them would produce an average of two different flights.

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

Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. UA1799 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.

• UA2608 LAS→IAH Return trip, LAS to IAH, departs 6:00 AM, on time 96.0%
• UA2316 DEN→LAS United Airlines flight into LAS, DEN to LAS, departs 7:45 AM, on time 90.8%
• UA1549 IAH→IAD United Airlines flight out of IAH, IAH to IAD, departs 7:20 AM, on time 92.7%
• UA668 SJU→IAH United Airlines flight into IAH, SJU to IAH, departs 2:55 PM, on time 75.9%