UA340

UA340 arrived on time 89.4% of the time, against 77.1% for all ATL → DEN flights, so this departure is 12.3 percentage points better than the route as a whole. Against United Airlines’ own flights on this route it is 4.9 points better.

Source: US DOT Bureau of Transportation Statistics · 914 operations, July 2023 – July 2026 · If UA340 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 ATL → DEN route as a whole, better than 94% of 11,788 comparable flight numbers.

89.4% on time for this specific departure, against 77.1% for every ATL → DEN 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 UA340 on ATL → DEN. Only delays of 15 minutes or more are attributed.

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

UA340 is usually the aircraft’s first flight of the day: the schedule gives it a median of 9.8 hours on the ground at ATL, so its “inbound” is mostly the aircraft’s arrival the evening before.

When the aircraft came in 15 or more minutes late, UA340 pushed back an average of 3 minutes late; when it came in on time or early, an average of 2 minutes late.

Each departure is matched to the flight the same aircraft flew into ATL just before it, using the tail number in the DOT file, 835 of 901 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

UA340 pushes back an average of 3.8 minutes late and reaches the gate at DEN an average of 1.6 minutes early. The 5.4 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 17.8 minutes on the taxiways at ATL is about what any departure from the airport in that hour spends.

On arrival at DEN, UA340 spends 11.6 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 1.8 minutes longer than a typical DEN arrival (9.8 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 DEN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 74,879 departures from ATL scheduled in the clock hour UA340 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at DEN (963,027 flights), not just UA340’s own. More on taxi time.

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

UA340 is scheduled out of ATL at 9:00 AM, in the 9 AM–10 AM bank. Departures from ATL in that hour arrive on time 84.6% of the time against 78.7% across the airport’s whole day — the slot alone is worth 5.9 points better before anything about this particular flight is considered.

The two airport figures cover every departure from ATL 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 UA340 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. UA340 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.

• DL995 ATL→DEN Delta Air Lines on the same route, departs 10:15 AM, on time 84.4%
• DL706 ATL→DEN Delta Air Lines on the same route, departs 11:30 AM, on time 86.0%
• UA235 ATL→DEN United Airlines on the same route, departs 4:20 PM, on time 77.6%