Flight profile · Southwest Airlines
WN40
Houston (HOU) to Dallas (DAL) · scheduled 4:00 PM – 5:10 PM
How WN40 performs
500 operations, 2023-09-05 to 2026-06-29.
WN40 arrived on time 73.9% of the time, against 81.5% for all HOU → DAL flights — this specific departure is 7.6 percentage points worse than the route as a whole. Against Southwest Airlines’s own flights on this route it is 7.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 500 operations between 2023-09-05 to 2026-06-29
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| WN40 | 73.9% | 0.80% | -3 min | 8.1% | 500 |
| 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 · 2023-09-05 to 2026-06-29
Other routes WN40 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→SAN Dallas to San Diego | 2026-06-04 – 2026-06-29 | 12 | — |
| DAL→COS Dallas to Colorado Springs | 2026-05-24 – 2026-05-24 | 1 | — |
| DAL→DEN Dallas to Denver | 2025-02-15 – 2026-04-06 | 44 | — |
| BNA→DCA Nashville to Washington | 2026-03-10 – 2026-04-01 | 8 | — |
| DAL→BNA Dallas to Nashville | 2026-03-10 – 2026-04-01 | 8 | — |
| DAL→SRQ Dallas to Sarasota/Bradenton | 2026-01-11 – 2026-03-02 | 14 | — |
| DAL→MAF Dallas to Midland | 2024-11-03 – 2026-01-05 | 44 | — |
| DAL→PIT Dallas to Pittsburgh | 2025-08-07 – 2025-09-29 | 24 | — |
| DAL→OMA Dallas to Omaha | 2025-08-31 – 2025-08-31 | 1 | — |
| OMA→DEN Omaha to Denver | 2025-08-31 – 2025-08-31 | 1 | — |
| DEN→LAS Denver to Las Vegas | 2025-06-05 – 2025-08-04 | 26 | — |
| DAL→MIA Dallas to Miami | 2025-04-10 – 2025-06-02 | 24 | — |
| CRP→HOU Corpus Christi to Houston | 2023-09-05 – 2025-03-05 | 50 | — |
| DAL→MCI Dallas to Kansas City | 2025-01-12 – 2025-03-03 | 13 | — |
| MCI→MDW Kansas City to Chicago | 2025-01-12 – 2025-03-03 | 13 | — |
| MDW→GRR Chicago to Grand Rapids | 2025-01-12 – 2025-03-03 | 13 | — |
| DAL→LAX Dallas to Los Angeles | 2023-11-21 – 2025-01-06 | 35 | — |
| LAX→SFO Los Angeles to San Francisco | 2024-11-04 – 2025-01-06 | 21 | — |
| DAL→IND Dallas to Indianapolis | 2024-10-08 – 2024-10-30 | 8 | — |
| DAL→LIT Dallas to Little Rock | 2023-09-09 – 2024-09-29 | 11 | — |
| LIT→DEN Little Rock to Denver | 2024-08-11 – 2024-09-29 | 7 | — |
| DAL→OAK Dallas to Oakland | 2024-05-26 – 2024-05-26 | 1 | — |
| DAL→ONT Dallas to Ontario | 2024-01-08 – 2024-03-04 | 25 | — |
| ONT→LAS Ontario to Las Vegas | 2024-01-08 – 2024-03-04 | 25 | — |
| DAL→LBB Dallas to Lubbock | 2023-09-05 – 2023-10-04 | 10 | — |
| ATL→JAN Atlanta to Jackson | 2023-09-10 – 2023-10-01 | 4 | — |
| DAL→DCA Dallas to Washington | 2023-09-10 – 2023-10-01 | 4 | — |
| JAN→HOU Jackson to Houston | 2023-09-10 – 2023-10-01 | 4 | — |
Because the same number has served different journeys, the statistics above describe only the route WN40 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 500 records of WN40 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.