WN19

WN19 arrived on time 82.3% of the time, against 76.8% for all DAL → HOU flights, so this departure is 5.5 percentage points better than the route as a whole. Against Southwest Airlines’ own flights on this route it is 5.5 points better.

Source: US DOT Bureau of Transportation Statistics · 779 operations, July 2023 – July 2026 · If WN19 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.

WN19 has cancelled 3.59% of its scheduled departures (28 of 779), against 1.98% for all DAL → HOU 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 WN19 specifically, not about the route it flies.

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

Share of the delay minutes US DOT attributed to each cause for WN19 on DAL → HOU. Only delays of 15 minutes or more are attributed.

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

The aircraft flying WN19 came in 15 or more minutes late on 10% 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 DAL just before it, using the tail number in the DOT file, 713 of 751 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

WN19 pushes back an average of 10.2 minutes late and reaches the gate at HOU an average of 4.6 minutes late. The 5.5 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 13.9 minutes on the taxiways at DAL is about what any departure from the airport in that hour spends.

On arrival at HOU, WN19 spends 5.2 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 about what any arrival at HOU 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 HOU. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 14,603 departures from DAL scheduled in the clock hour WN19 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at HOU (172,208 flights), not just WN19’s own. More on taxi time.

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

WN19 is scheduled out of DAL at 11:30 AM, in the 11 AM–12 PM bank. Departures from DAL in that hour arrive on time 81.0% of the time against 76.0% across the airport’s whole day — the slot alone is worth 5.1 points better before anything about this particular flight is considered.

The two airport figures cover every departure from DAL 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.

Because the same number has served different journeys, the statistics above describe only the route WN19 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. WN19 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.

• WN1 DAL→HOU Southwest Airlines on the same route, departs 7:00 AM, on time 89.9%
• WN39 DAL→HOU Southwest Airlines on the same route, departs 4:00 PM, on time 72.3%
• WN1628 DAL→HOU Southwest Airlines on the same route, departs 6:00 AM, on time 94.3%