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Flight Reliability

WN 426 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 426 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

75%
Arrive within 15 minutes
7 min
Average arrival delay
1.6%
Cancelled
2 min early
Median arrival delay

Based on 435 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(61 flights)
  • Tue89%(62 flights)
  • Wed81%(63 flights)
  • Thu62%(63 flights)
  • Fri78%(63 flights)
  • Sat89%(44 flights)
  • Sun60%(72 flights)
On-time by departure window
  • 3–6 AM—(2 flights)
  • 6–9 AM90%(112 flights)
  • 9 AM–12 PM88%(42 flights)
  • 12–3 PM76%(92 flights)
  • 3–6 PM68%(91 flights)
  • 6–9 PM54%(89 flights)
On-time trend by month
58%
May

Jun 80% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202580%30
August 202582%27
September 202560%25
October 202561%31
November 202586%28
December 202580%30
January 202686%29
February 202692%26
March 202685%53
April 202666%59
May 202658%60
Departures on time
72%
Diverted
0%
Flights flown
428
Months covered
12

Keep nerding

Based on 435 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.