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Flight Reliability

WN 1628 · Southwest Airlines

Dallas → Houston (DAL–HOU)

94
Nerd Approved
WanderNerd Reliability Score
94%
Arrive within 15 minutes
6 min early
Average arrival delay
1.5%
Cancelled
10 min early
Median arrival delay

Based on 269 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

WN 1628 arrived on time 98% of the time on Fridays. On Mondays: 87%.

Well ahead of the DAL–HOU route.

WN 1628 arrived on time 94% of the time, versus 75% across the DAL–HOU route.

Well ahead of the Southwest Airlines network.

WN 1628 arrived on time 94% of the time, versus 78% across the Southwest Airlines network.

The breakdown

On-time by weekday
  • Mon87%(45 flights)
  • Tue97%(37 flights)
  • Wed97%(34 flights)
  • Thu98%(43 flights)
  • Fri98%(45 flights)
  • Sat88%(32 flights)
  • Sun93%(28 flights)
On-time trend by month
90%
May

Jun 92% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%24
July 2025100%26
August 202591%22
September 2025100%22
October 202596%26
November 202595%19
December 202593%14
February 202693%15
March 202690%29
April 202693%30
May 202690%29
Departures on time
94%
Diverted
0.4%
Flights flown
264
Months covered
12

Same route, other flights

Keep nerding

Based on 269 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.