About 1 in 14 WN 4 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (7%); 1.9% were cancelled. The typical flight landed 12 minutes early.
WN 4: HOU → DAL
Scheduled to leave Houston at 7:00 a.m. local time. Over the past year it arrived on time 93% of the time (214 flights), in line with other WN flights on the route at that hour (93%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 42 | 93% |
| Tuesday | 31 | 94% |
| Wednesday | 30 | 93% |
| Thursday | 41 | 98% |
| Friday | 42 | 93% |
| Saturday | 8 | — |
| Sunday | 20 | 95% |
Why it was late
Questions
How often is WN 4 from HOU to DAL late?
Southwest Airlines 4 from Houston, TX to Dallas, TX arrived 15 or more minutes late, was diverted or was cancelled on 7% of 214 scheduled flights between September 2025 and August 2026. 1.9% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Southwest Airlines for today's flight. Method.