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Flight Reliability

WN 187 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 187 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

74%
Arrive within 15 minutes
11 min
Average arrival delay
0.2%
Cancelled
1 min early
Median arrival delay

Based on 450 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon70%(70 flights)
  • Tue78%(60 flights)
  • Wed80%(60 flights)
  • Thu74%(72 flights)
  • Fri80%(71 flights)
  • Sat69%(54 flights)
  • Sun66%(61 flights)
On-time by departure window
  • 6–9 AM95%(37 flights)
  • 9 AM–12 PM77%(167 flights)
  • 12–3 PM74%(87 flights)
  • 3–6 PM63%(43 flights)
  • 6–9 PM66%(93 flights)
  • 9 PM–12 AM71%(21 flights)
On-time trend by month
87%
May

Jun 69% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%29
July 202563%30
August 202578%32
September 202580%30
October 202575%48
November 202548%29
December 202539%31
January 202677%26
February 202693%27
March 202677%92
April 202688%43
May 202687%31
Departures on time
67%
Diverted
0.2%
Flights flown
448
Months covered
12

Keep nerding

Based on 450 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.