WN21: Dallas to Houston
Southwest Airlines flight WN21 flies from Dallas Love Field (DAL) to Houston (HOU), 386 km. Over August 2025 to July 2026 it usually arrives about 7 minutes late: 76% of 90 flights arrived within 15 minutes of schedule and 0% were cancelled (US Department of Transportation data).
On-time record, last 12 months
Every operation of WN21, August 2025 to July 2026: 90 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as WN21
- Dallas Love Field (DAL) to Houston (HOU)43 flights
- Santa Ana (SNA) to Dallas Love Field (DAL)8 flights
- Phoenix Sky Harbor (PHX) to Sacramento (SMF)8 flights
- Phoenix Sky Harbor (PHX) to Dallas Love Field (DAL)5 flights
- Lubbock Preston Smith (LBB) to Dallas Love Field (DAL)5 flights
- Ontario (ONT) to Phoenix Sky Harbor (PHX)5 flights
- Las Vegas (LAS) to Phoenix Sky Harbor (PHX)5 flights
- Houston (HOU) to Las Vegas (LAS)5 flights
- Sacramento (SMF) to Dallas Love Field (DAL)5 flights
- Houston (HOU) to Corpus Christi (CRP)1 flights
Other flights from Dallas to Houston
More about Dallas Love Field (DAL) and Houston (HOU).
Questions and answers
- Is WN21 usually on time?
- 76% of Southwest Airlines flight WN21's 90 flights from August 2025 to July 2026 arrived within 15 minutes of schedule, 2.1 points below the US average of 77.6%. It arrived about 7 minutes late on average.
- How often is WN21 cancelled or badly delayed?
- 0% of WN21's scheduled flights were cancelled from August 2025 to July 2026 (0 of 90), and 11% of the flights that operated arrived more than 30 minutes late.
- What route does WN21 fly?
- WN21 most often flies from Dallas Love Field (DAL) to Houston (HOU), 386 km (43 flights in the period). The same flight number also flew Santa Ana (SNA) to Dallas Love Field (DAL), Phoenix Sky Harbor (PHX) to Sacramento (SMF), Phoenix Sky Harbor (PHX) to Dallas Love Field (DAL).
- Where do these WN21 figures come from?
- From the US Bureau of Transportation Statistics (BTS) on-time records, which cover every domestic flight by the larger US airlines. The figures cover August 2025 to July 2026 and are updated each month when new BTS data is published, about two months after the month ends. See how TripStow measures punctuality.
How does Southwest Airlines compare? Southwest Airlines' on-time record and the US airline league table.
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