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Flight Reliability

WN 137 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 137 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
9 min
Average arrival delay
0.9%
Cancelled
3 min early
Median arrival delay

Based on 319 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon66%(44 flights)
  • Tue68%(37 flights)
  • Wed74%(35 flights)
  • Thu72%(43 flights)
  • Fri76%(45 flights)
  • Sat75%(57 flights)
  • Sun80%(55 flights)
On-time by departure window
  • 6–9 AM97%(67 flights)
  • 9 AM–12 PM93%(15 flights)
  • 12–3 PM66%(111 flights)
  • 3–6 PM61%(84 flights)
  • 6–9 PM71%(31 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
88%
May

Jun 63% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202538%29
August 202567%12
October 202584%43
November 202576%21
December 202547%17
January 2026100%25
February 202682%27
March 202659%39
April 202684%32
May 202688%33
Departures on time
68%
Diverted
0%
Flights flown
316
Months covered
12

Keep nerding

Based on 319 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.