DL2109

DL2109 arrived on time 63.4% of the time, against 78.7% for all LGA → IAH flights, so this departure is 15.3 percentage points worse than the route as a whole. Against Delta Air Lines’ own flights on this route it is 13.3 points worse.

DL2109’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 7:00 PM earlier on, and around 6:30 PM more recently — a 30-minute shift, not the few minutes of day-to-day rounding every published schedule carries. Confirm the current departure time before booking around an older listing.

Source: US DOT Bureau of Transportation Statistics · 683 operations, June 2024 – July 2026 · If DL2109 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's worst arrivals run unusually far past its typical one, a bigger gap than 98% of 11,788 comparable flight numbers.

A typical arrival is 4 min early, but the worst tenth run 120 minutes worse than that.

Source: FlyerIntel analysis of US DOT BTS data · June 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.

DL2109 has cancelled 3.95% of its scheduled departures (27 of 683), against 2.31% for all LGA → IAH flights — this specific departure cancels 1.6 percentage points more 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 DL2109 specifically, not about the route it flies.

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

Share of the delay minutes US DOT attributed to each cause for DL2109 on LGA → IAH. Only delays of 15 minutes or more are attributed.

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

When the aircraft came in 15 or more minutes late, DL2109 pushed back an average of 77 minutes late; when it came in on time or early, an average of 8 minutes 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, 610 of 659 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 June 2024 – July 2026

DL2109 pushes back an average of 34.3 minutes late and reaches the gate at IAH an average of 24.1 minutes late. The 10.2 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. It spends 28.4 minutes on the taxiways at LGA, 2.4 minutes longer than a typical LGA departure in the same hour.

On arrival at IAH, DL2109 spends 9.0 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 1.7 minutes shorter than a typical IAH arrival (10.7 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 IAH. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 29,293 departures from LGA scheduled in the clock hour DL2109 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at IAH (359,471 flights), not just DL2109’s own. More on taxi time.

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

DL2109 is scheduled out of LGA at 6:59 PM, in the 6 PM–7 PM bank. Departures from LGA in that hour arrive on time 69.5% of the time against 78.3% across the airport’s whole day — the slot alone is worth 8.8 points worse 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 · June 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 DL2109 currently operates. Blending them would produce an average of two different flights.

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

Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. DL2109 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.

• DL2099 LGA→IAH Delta Air Lines on the same route, departs 10:10 AM, on time 78.4%
• DL1417 IAH→LGA Return trip, IAH to LGA, departs 7:00 AM, on time 88.3%
• DL2433 LGA→TPA Delta Air Lines flight out of LGA, LGA to TPA, departs 6:59 PM, on time 62.4%