UA777

Source: US DOT Bureau of Transportation Statistics · 1,126 operations, July 2023 – July 2026 · If UA777 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 · July 2023 – July 2026

Share of the delay minutes US DOT attributed to each cause for UA777 on ORD → LAS. Only delays of 15 minutes or more are attributed.

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

When the aircraft came in 15 or more minutes late, UA777 pushed back an average of 40 minutes late; when it came in on time or early, an average of 5 minutes late.

Each departure is matched to the flight the same aircraft flew into ORD just before it, using the tail number in the DOT file, 993 of 1,116 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

UA777 pushes back an average of 15.9 minutes late and reaches the gate at LAS an average of 7.7 minutes late. The 8.1 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 26.6 minutes on the taxiways at ORD is about what any departure from the airport in that hour spends.

On arrival at LAS, UA777 spends 8.4 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 LAS 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 LAS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 61,552 departures from ORD scheduled in the clock hour UA777 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 UA777’s own. More on taxi time.

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

UA777 is scheduled out of ORD at 7:45 PM, in the 7 PM–8 PM bank. Departures from ORD in that hour arrive on time 66.1% of the time against 74.5% across the airport’s whole day — the slot alone is worth 8.4 points worse before anything about this particular flight is considered.

The two airport figures cover every departure from ORD 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 UA777 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

• UA2102 LAS→ORD Return trip, LAS to ORD, departs 11:59 PM, on time 89.6%
• UA664 LAS→ORD Return trip, LAS to ORD, departs 7:00 AM, on time 92.3%
• UA655 DEN→LAS United Airlines flight into LAS, DEN to LAS, departs 7:25 PM, on time 70.6%