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Flight Reliability

WN 1230 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1230 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
6 min
Average arrival delay
1.6%
Cancelled
5 min early
Median arrival delay

Based on 376 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(55 flights)
  • Tue80%(54 flights)
  • Wed85%(53 flights)
  • Thu71%(55 flights)
  • Fri85%(58 flights)
  • Sat82%(34 flights)
  • Sun85%(59 flights)
On-time by departure window
  • 3–6 AM97%(57 flights)
  • 6–9 AM89%(27 flights)
  • 9 AM–12 PM92%(51 flights)
  • 12–3 PM74%(92 flights)
  • 3–6 PM71%(14 flights)
  • 6–9 PM65%(60 flights)
  • 9 PM–12 AM78%(67 flights)
On-time trend by month
82%
May

Jun 69% → May 82% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%26
July 202552%27
August 202579%29
September 202593%30
October 202597%31
November 202595%19
December 202587%15
January 202687%46
February 202682%49
March 202652%33
April 202690%30
May 202682%33
Departures on time
75%
Diverted
0.5%
Flights flown
368
Months covered
12

Keep nerding

Based on 376 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.