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Flight Reliability

WN 4398 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4398 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

89%
Arrive within 15 minutes
5 min early
Average arrival delay
0%
Cancelled
9 min early
Median arrival delay

Based on 224 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(36 flights)
  • Tue96%(26 flights)
  • Wed89%(26 flights)
  • Thu94%(36 flights)
  • Fri87%(38 flights)
  • Sat77%(30 flights)
  • Sun94%(32 flights)
On-time by departure window
  • 6–9 AM95%(79 flights)
  • 9 AM–12 PM95%(20 flights)
  • 12–3 PM70%(20 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM86%(70 flights)
  • 9 PM–12 AM97%(30 flights)
On-time trend by month
100%
May

Aug 93% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202593%27
September 2025100%30
October 202589%27
November 202586%28
December 202587%31
February 2026100%11
March 202679%24
April 202683%18
May 2026100%17
Departures on time
87%
Diverted
0%
Flights flown
224
Months covered
11

Keep nerding

Based on 224 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.