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Flight Reliability

WN 440 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 440 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

73%
Arrive within 15 minutes
15 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 382 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon58%(52 flights)
  • Tue90%(52 flights)
  • Wed82%(50 flights)
  • Thu71%(51 flights)
  • Fri64%(53 flights)
  • Sat85%(52 flights)
  • Sun67%(69 flights)
On-time by departure window
  • 3–6 AM—(3 flights)
  • 6–9 AM94%(93 flights)
  • 12–3 PM80%(30 flights)
  • 3–6 PM67%(143 flights)
  • 6–9 PM59%(81 flights)
  • 9 PM–12 AM69%(29 flights)
On-time trend by month
58%
May

Jun 94% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202594%18
July 202594%18
August 202571%34
September 202568%34
October 202554%35
November 202563%41
December 202577%34
January 202697%31
February 202689%28
March 202676%42
April 202664%33
May 202658%31
Departures on time
67%
Diverted
0.5%
Flights flown
379
Months covered
12

Keep nerding

Based on 382 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.