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Flight Reliability

WN 4357 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4357 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

72%
Arrive within 15 minutes
11 min
Average arrival delay
0%
Cancelled
1 min
Median arrival delay

Based on 255 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(45 flights)
  • Tue78%(27 flights)
  • Wed67%(27 flights)
  • Thu68%(44 flights)
  • Fri76%(45 flights)
  • Sat85%(26 flights)
  • Sun65%(40 flights)
On-time by departure window
  • 9 AM–12 PM71%(44 flights)
  • 12–3 PM62%(77 flights)
  • 3–6 PM75%(28 flights)
  • 6–9 PM80%(105 flights)
On-time trend by month
93%
May

Jun 69% → May 93% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%51
July 202556%57
August 202565%23
September 2025100%17
November 202583%30
December 202576%33
February 202683%12
April 202680%10
May 202693%14
Departures on time
70%
Diverted
0.4%
Flights flown
254
Months covered
11

Keep nerding

Based on 255 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.