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Flight Reliability

WN 1438 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1438 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

76%
Arrive within 15 minutes
12 min
Average arrival delay
0.2%
Cancelled
5 min early
Median arrival delay

Based on 427 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(62 flights)
  • Tue74%(57 flights)
  • Wed86%(57 flights)
  • Thu75%(59 flights)
  • Fri65%(60 flights)
  • Sat83%(75 flights)
  • Sun70%(54 flights)
On-time by departure window
  • 6–9 AM91%(99 flights)
  • 9 AM–12 PM92%(72 flights)
  • 12–3 PM76%(66 flights)
  • 3–6 PM67%(79 flights)
  • 6–9 PM61%(104 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
92%
May

Jun 48% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%46
July 202541%42
August 202580%39
September 202587%38
October 202580%39
November 202590%30
December 202584%31
January 202694%31
February 202671%28
March 202694%31
April 202679%33
May 202692%36
Departures on time
72%
Diverted
0.5%
Flights flown
424
Months covered
12

Keep nerding

Based on 427 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.