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Flight Reliability

WN 1838 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1838 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

82%
Arrive within 15 minutes
6 min
Average arrival delay
1.8%
Cancelled
4 min early
Median arrival delay

Based on 400 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(60 flights)
  • Tue88%(48 flights)
  • Wed98%(46 flights)
  • Thu79%(61 flights)
  • Fri78%(64 flights)
  • Sat80%(65 flights)
  • Sun77%(48 flights)
On-time by departure window
  • 3–6 AM96%(24 flights)
  • 6–9 AM100%(22 flights)
  • 9 AM–12 PM85%(157 flights)
  • 12–3 PM83%(86 flights)
  • 3–6 PM69%(54 flights)
  • 6–9 PM71%(41 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
76%
May

Jun 83% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202574%31
August 202584%38
September 202595%39
October 2025100%30
November 202577%30
December 202563%32
January 202684%31
February 202681%32
March 202665%17
April 202692%36
May 202676%46
Departures on time
77%
Diverted
0.3%
Flights flown
392
Months covered
12

Keep nerding

Based on 400 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.