Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1881 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1881 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

71%
Arrive within 15 minutes
15 min
Average arrival delay
0.3%
Cancelled
3 min
Median arrival delay

Based on 387 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(66 flights)
  • Tue73%(52 flights)
  • Wed75%(51 flights)
  • Thu59%(64 flights)
  • Fri68%(63 flights)
  • Sat71%(35 flights)
  • Sun69%(55 flights)
On-time by departure window
  • 3–6 AM—(8 flights)
  • 6–9 AM88%(43 flights)
  • 9 AM–12 PM77%(87 flights)
  • 12–3 PM82%(106 flights)
  • 3–6 PM48%(91 flights)
  • 6–9 PM55%(51 flights)
On-time trend by month
84%
May

Jun 51% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202551%43
July 202544%43
August 202580%46
September 202577%47
October 202593%14
November 202564%25
December 202582%27
January 202689%26
February 202692%24
March 202652%31
April 202669%29
May 202684%31
Departures on time
67%
Diverted
0%
Flights flown
386
Months covered
12

Keep nerding

Based on 387 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.