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Flight Reliability

WN 660 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 660 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
11 min
Average arrival delay
0.4%
Cancelled
1 min early
Median arrival delay

Based on 545 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(88 flights)
  • Tue83%(75 flights)
  • Wed80%(81 flights)
  • Thu64%(91 flights)
  • Fri66%(80 flights)
  • Sat74%(49 flights)
  • Sun71%(78 flights)
On-time by departure window
  • 3–6 AM92%(25 flights)
  • 6–9 AM89%(90 flights)
  • 9 AM–12 PM85%(79 flights)
  • 12–3 PM88%(91 flights)
  • 3–6 PM67%(101 flights)
  • 6–9 PM46%(110 flights)
  • 9 PM–12 AM48%(46 flights)
On-time trend by month
41%
May

Jun 67% → May 41% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%64
July 202540%67
August 202589%37
September 2025100%30
October 202571%31
November 202580%49
December 202583%57
January 202696%50
February 202695%37
March 202681%37
April 202649%41
May 202641%42
Departures on time
67%
Diverted
0.2%
Flights flown
542
Months covered
12

Keep nerding

Based on 545 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.