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Flight Reliability

WN 1939 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1939 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

83%
Arrive within 15 minutes
2 min
Average arrival delay
0.8%
Cancelled
6 min early
Median arrival delay

Based on 400 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(60 flights)
  • Tue77%(60 flights)
  • Wed85%(60 flights)
  • Thu88%(60 flights)
  • Fri77%(60 flights)
  • Sat93%(41 flights)
  • Sun84%(56 flights)
On-time by departure window
  • 3–6 AM75%(12 flights)
  • 6–9 AM96%(142 flights)
  • 9 AM–12 PM81%(48 flights)
  • 12–3 PM76%(62 flights)
  • 3–6 PM75%(72 flights)
  • 6–9 PM72%(61 flights)
On-time trend by month
91%
May

Jun 82% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%38
July 202581%41
August 202589%27
September 202569%26
October 202586%44
November 202591%43
December 202574%35
January 202689%28
February 202683%24
March 202666%29
April 202690%30
May 202691%32
Departures on time
79%
Diverted
0%
Flights flown
397
Months covered
12

Keep nerding

Based on 400 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.