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Flight Reliability

WN 1331 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1331 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

67%
Arrive within 15 minutes
13 min
Average arrival delay
1.0%
Cancelled
2 min
Median arrival delay

Based on 402 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(61 flights)
  • Tue77%(39 flights)
  • Wed66%(38 flights)
  • Thu52%(64 flights)
  • Fri71%(66 flights)
  • Sat67%(49 flights)
  • Sun70%(81 flights)
On-time by departure window
  • 6–9 AM88%(34 flights)
  • 9 AM–12 PM90%(31 flights)
  • 12–3 PM84%(44 flights)
  • 3–6 PM54%(130 flights)
  • 6–9 PM62%(148 flights)
  • 9 PM–12 AM82%(11 flights)
On-time trend by month
47%
May

Jun 59% → May 47% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%29
July 202579%29
August 202558%31
September 202576%33
October 202570%63
November 202582%44
December 202549%37
January 202663%16
February 202681%16
March 202688%17
April 202668%38
May 202647%45
Departures on time
62%
Diverted
0%
Flights flown
398
Months covered
12

Keep nerding

Based on 402 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.