Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 381 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 381 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

80%
Arrive within 15 minutes
5 min
Average arrival delay
0.8%
Cancelled
5 min early
Median arrival delay

Based on 372 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon84%(49 flights)
  • Tue74%(62 flights)
  • Wed79%(61 flights)
  • Thu92%(49 flights)
  • Fri87%(47 flights)
  • Sat68%(41 flights)
  • Sun75%(59 flights)
On-time by departure window
  • 3–6 AM—(5 flights)
  • 6–9 AM91%(53 flights)
  • 9 AM–12 PM96%(27 flights)
  • 12–3 PM88%(32 flights)
  • 3–6 PM74%(106 flights)
  • 6–9 PM71%(115 flights)
  • 9 PM–12 AM87%(30 flights)
On-time trend by month
50%
May

Jun 73% → May 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%26
July 202562%26
August 202578%41
September 202586%43
October 202577%31
November 202582%28
December 202569%29
January 202690%31
February 202694%48
March 202694%32
April 202665%17
May 202650%16
Departures on time
74%
Diverted
0.3%
Flights flown
368
Months covered
12

Keep nerding

Based on 372 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.