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Flight Reliability

WN 1439 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1439 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

72%
Arrive within 15 minutes
10 min
Average arrival delay
0.6%
Cancelled
1 min
Median arrival delay

Based on 324 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon64%(47 flights)
  • Tue79%(53 flights)
  • Wed86%(55 flights)
  • Thu79%(48 flights)
  • Fri69%(45 flights)
  • Sat71%(31 flights)
  • Sun52%(42 flights)
On-time by departure window
  • 6–9 AM95%(73 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM76%(41 flights)
  • 3–6 PM72%(68 flights)
  • 6–9 PM61%(88 flights)
  • 9 PM–12 AM55%(49 flights)
On-time trend by month
69%
May

Jun 64% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%14
July 202585%13
August 202561%23
September 202573%26
October 202563%19
November 202572%39
December 202572%43
January 202693%29
February 2026100%24
March 202655%29
April 202663%30
May 202669%32
Departures on time
69%
Diverted
0.3%
Flights flown
321
Months covered
12

Keep nerding

Based on 324 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.