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Flight Reliability

WN 2139 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2139 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

75%
Arrive within 15 minutes
8 min
Average arrival delay
0.3%
Cancelled
0 min
Median arrival delay

Based on 374 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(50 flights)
  • Tue82%(51 flights)
  • Wed85%(52 flights)
  • Thu71%(49 flights)
  • Fri77%(47 flights)
  • Sat81%(53 flights)
  • Sun65%(71 flights)
On-time by departure window
  • 6–9 AM91%(131 flights)
  • 9 AM–12 PM—(7 flights)
  • 12–3 PM77%(99 flights)
  • 3–6 PM66%(56 flights)
  • 6–9 PM55%(60 flights)
  • 9 PM–12 AM50%(20 flights)
On-time trend by month
65%
May

Jun 60% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%35
July 202562%45
August 202570%30
September 202596%26
October 202567%21
November 202593%15
December 202580%25
January 202683%29
February 202694%31
March 202674%31
April 202680%39
May 202665%46
Departures on time
66%
Diverted
0%
Flights flown
373
Months covered
12

Keep nerding

Based on 374 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.