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Flight Reliability

WN 853 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 853 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

78%
Arrive within 15 minutes
6 min
Average arrival delay
1.5%
Cancelled
3 min early
Median arrival delay

Based on 344 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(52 flights)
  • Tue77%(57 flights)
  • Wed72%(54 flights)
  • Thu94%(47 flights)
  • Fri74%(50 flights)
  • Sat70%(27 flights)
  • Sun78%(51 flights)
On-time by departure window
  • 6–9 AM95%(101 flights)
  • 9 AM–12 PM100%(36 flights)
  • 12–3 PM75%(47 flights)
  • 3–6 PM66%(68 flights)
  • 6–9 PM54%(48 flights)
  • 9 PM–12 AM68%(38 flights)
On-time trend by month
76%
May

Jun 59% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%32
July 202552%31
August 202584%19
September 2025100%17
October 202582%22
November 202582%28
December 202567%45
January 202696%28
February 202696%24
March 202663%19
April 202697%35
May 202676%38
Departures on time
77%
Diverted
0.3%
Flights flown
338
Months covered
12

Keep nerding

Based on 344 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.