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Flight Reliability

WN 1388 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1388 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

84%
Arrive within 15 minutes
2 min
Average arrival delay
2.3%
Cancelled
6 min early
Median arrival delay

Based on 386 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(55 flights)
  • Tue79%(53 flights)
  • Wed92%(52 flights)
  • Thu84%(55 flights)
  • Fri80%(51 flights)
  • Sat78%(50 flights)
  • Sun90%(61 flights)
On-time by departure window
  • 3–6 AM90%(29 flights)
  • 6–9 AM85%(78 flights)
  • 9 AM–12 PM85%(39 flights)
  • 12–3 PM87%(103 flights)
  • 3–6 PM78%(54 flights)
  • 6–9 PM80%(74 flights)
On-time trend by month
77%
May

Jun 68% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%31
July 202587%31
August 202597%33
September 202594%34
October 202571%31
November 202583%30
December 202573%30
January 202688%33
February 202689%35
March 202690%29
April 202686%29
May 202677%31
Departures on time
81%
Diverted
0%
Flights flown
377
Months covered
12

Keep nerding

Based on 386 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.