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Flight Reliability

WN 3187 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3187 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

88%
Arrive within 15 minutes
3 min
Average arrival delay
1.0%
Cancelled
8 min early
Median arrival delay

Based on 391 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(64 flights)
  • Tue96%(44 flights)
  • Wed96%(47 flights)
  • Thu77%(65 flights)
  • Fri90%(61 flights)
  • Sat85%(46 flights)
  • Sun82%(56 flights)
On-time by departure window
  • 3–6 AM97%(33 flights)
  • 6–9 AM98%(44 flights)
  • 9 AM–12 PM87%(94 flights)
  • 12–3 PM88%(104 flights)
  • 3–6 PM85%(88 flights)
  • 6–9 PM65%(20 flights)
On-time trend by month
85%
May

Jun 80% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%44
July 202587%46
August 202588%41
September 202592%39
October 202587%23
November 202568%25
December 2025100%21
January 202693%28
February 202690%19
March 202697%30
April 202691%33
May 202685%34
Departures on time
79%
Diverted
1.0%
Flights flown
383
Months covered
12

Keep nerding

Based on 391 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.