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Flight Reliability

WN 839 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 839 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

87%
Arrive within 15 minutes
1 min early
Average arrival delay
0.9%
Cancelled
8 min early
Median arrival delay

Based on 457 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon87%(94 flights)
  • Tue93%(53 flights)
  • Wed83%(53 flights)
  • Thu89%(88 flights)
  • Fri90%(91 flights)
  • Sat79%(29 flights)
  • Sun76%(45 flights)
On-time by departure window
  • 3–6 AM100%(43 flights)
  • 6–9 AM96%(76 flights)
  • 9 AM–12 PM86%(117 flights)
  • 12–3 PM78%(128 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM82%(56 flights)
  • 9 PM–12 AM96%(24 flights)
On-time trend by month
85%
May

Jun 91% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202591%21
July 202587%15
August 202594%70
September 202588%74
October 202577%31
November 202573%40
December 202591%53
January 202673%33
February 202692%12
March 202692%47
April 202690%30
May 202685%27
Departures on time
80%
Diverted
0%
Flights flown
453
Months covered
12

Keep nerding

Based on 457 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.