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Flight Reliability

WN 4179 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4179 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

67%
Arrive within 15 minutes
10 min
Average arrival delay
1.3%
Cancelled
4 min
Median arrival delay

Based on 158 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(23 flights)
  • Tue63%(24 flights)
  • Wed68%(22 flights)
  • Thu57%(21 flights)
  • Fri67%(24 flights)
  • Sat70%(20 flights)
  • Sun67%(21 flights)
On-time by departure window
  • 9 AM–12 PM85%(13 flights)
  • 3–6 PM—(1 flights)
  • 6–9 PM68%(110 flights)
  • 9 PM–12 AM55%(31 flights)
On-time trend by month
47%
May

Dec 70% → May 47% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
December 202570%10
January 202681%26
February 202689%28
March 202659%29
April 202657%30
May 202647%30
Departures on time
58%
Diverted
0.6%
Flights flown
155
Months covered
7

Keep nerding

Based on 158 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.