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Flight Reliability

WN 1 · Southwest Airlines

Dallas → Houston (DAL–HOU)97% of its flights flew this route. The rest (AMA–DAL, HOU–CRP) are included in these numbers.

96
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
3 min early
Average arrival delay
0%
Cancelled
7 min early
Median arrival delay

Based on 225 historical flights. Data through May 2026.

What the data says

Skip Thursday if you can.

WN 1 arrived on time 100% of the time on Saturdays. On Thursdays: 88%.

Well ahead of the DAL–HOU route.

WN 1 arrived on time 92% of the time, versus 75% across the DAL–HOU route.

Better than the Southwest Airlines network average.

WN 1 arrived on time 92% of the time, versus 78% across the Southwest Airlines network.

It basically never cancels.

Out of 225 scheduled flights, only 0.0% were cancelled.

The breakdown

On-time by weekday
  • Mon93%(43 flights)
  • Tue91%(34 flights)
  • Wed91%(33 flights)
  • Thu88%(42 flights)
  • Fri93%(44 flights)
  • Sat100%(10 flights)
  • Sun88%(17 flights)
On-time by departure window
  • 3–6 AM—(5 flights)
  • 6–9 AM91%(217 flights)
  • 9 AM–12 PM—(1 flights)
On-time trend by month
71%
May

Jun 95% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%19
July 202591%23
August 202595%21
September 2025100%22
October 202594%35
November 202593%14
February 2026100%15
March 2026100%21
April 202682%22
May 202671%21
Departures on time
96%
Diverted
0.9%
Flights flown
223
Months covered
12

Same route, other flights

Keep nerding

Based on 225 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.