Flight profile · Southwest Airlines
WN1636
Houston (HOU) to Dallas (DAL) · scheduled 6:00 AM – 7:05 AM
How WN1636 performs
877 operations, 2023-07-02 to 2026-06-30.
WN1636 arrived on time 94.5% of the time, against 81.5% for all HOU → DAL flights — this specific departure is 12.9 percentage points better than the route as a whole. Against Southwest Airlines’s own flights on this route it is 12.9 points better.
Source: US DOT Bureau of Transportation Statistics · 877 operations between 2023-07-02 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| WN1636 | 94.5% | 1.03% | -11 min | 1.2% | 877 |
| Southwest Airlines on HOU → DAL | 81.5% | 2.08% | -8 min | 6.0% | 12,341 |
| All HOU → DAL flights | 81.5% | 2.08% | -8 min | 6.0% | 12,341 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-02 to 2026-06-30
By day of week
Does WN1636 run worse on particular days?
Wednesday is historically the most reliable day and Monday the least, a gap of 2.6 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-02 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes WN1636 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| DAL→BHM Dallas to Birmingham | 2026-04-12 – 2026-05-31 | 7 | — |
| DAL→PDX Dallas to Portland | 2026-03-05 – 2026-04-06 | 15 | — |
| DAL→LGA Dallas to New York | 2026-03-08 – 2026-04-05 | 5 | — |
| DAL→PHL Dallas to Philadelphia | 2026-03-07 – 2026-04-04 | 13 | — |
| DAL→IND Dallas to Indianapolis | 2026-02-12 – 2026-03-01 | 8 | — |
| DAL→SAN Dallas to San Diego | 2025-11-03 – 2025-12-31 | 23 | — |
| DAL→LAS Dallas to Las Vegas | 2023-09-07 – 2025-10-29 | 57 | — |
| DAL→SMF Dallas to Sacramento | 2025-06-05 – 2025-08-04 | 26 | — |
| LAS→BHM Las Vegas to Birmingham | 2025-06-05 – 2025-08-04 | 26 | — |
| LGB→LAS Long Beach to Las Vegas | 2025-06-05 – 2025-08-04 | 26 | — |
| SMF→LGB Sacramento to Long Beach | 2025-06-05 – 2025-08-04 | 26 | — |
| DAL→BNA Dallas to Nashville | 2025-04-08 – 2025-06-04 | 18 | — |
| DAL→MCI Dallas to Kansas City | 2024-12-01 – 2024-12-01 | 1 | — |
| DAL→ELP Dallas to El Paso | 2024-06-09 – 2024-08-04 | 9 | — |
| LAS→PHX Las Vegas to Phoenix | 2024-06-04 – 2024-07-31 | 18 | — |
| PHX→AUS Phoenix to Austin | 2024-06-04 – 2024-07-31 | 18 | — |
| DAL→DEN Dallas to Denver | 2024-07-05 – 2024-07-05 | 1 | — |
| DEN→TUS Denver to Tucson | 2024-07-05 – 2024-07-05 | 1 | — |
| TUS→LAS Tucson to Las Vegas | 2024-07-05 – 2024-07-05 | 1 | — |
| LAS→PSP Las Vegas to Palm Springs | 2024-07-04 – 2024-07-04 | 1 | — |
| PSP→SMF Palm Springs to Sacramento | 2024-07-04 – 2024-07-04 | 1 | — |
| DAL→OMA Dallas to Omaha | 2024-03-09 – 2024-04-06 | 5 | — |
| OMA→DEN Omaha to Denver | 2024-03-09 – 2024-04-06 | 5 | — |
| DAL→SJC Dallas to San Jose | 2024-03-12 – 2024-04-03 | 8 | — |
| DAL→STL Dallas to St. Louis | 2023-10-05 – 2023-11-03 | 14 | — |
| DAL→MDW Dallas to Chicago | 2023-10-10 – 2023-11-01 | 8 | — |
| DAL→PHX Dallas to Phoenix | 2023-07-03 – 2023-10-04 | 16 | — |
| PHX→RNO Phoenix to Reno | 2023-09-05 – 2023-10-04 | 10 | — |
| BUR→SJC Burbank to San Jose | 2023-09-07 – 2023-10-02 | 12 | — |
| LAS→BUR Las Vegas to Burbank | 2023-09-07 – 2023-10-02 | 12 | — |
| SJC→GEG San Jose to Spokane | 2023-09-07 – 2023-10-02 | 12 | — |
| BWI→BOS Baltimore to Boston | 2023-08-15 – 2023-09-04 | 17 | — |
| DAL→BWI Dallas to Baltimore | 2023-08-15 – 2023-09-04 | 17 | — |
Because the same number has served different journeys, the statistics above describe only the route WN1636 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 877 records of WN1636 operating HOU → DAL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.