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Flight Reliability

WN 2004 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2004 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

64%
Arrive within 15 minutes
20 min
Average arrival delay
0.4%
Cancelled
4 min
Median arrival delay

Based on 493 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon61%(84 flights)
  • Tue80%(65 flights)
  • Wed74%(65 flights)
  • Thu46%(85 flights)
  • Fri49%(80 flights)
  • Sat87%(53 flights)
  • Sun70%(59 flights)
On-time by departure window
  • 3–6 AM92%(13 flights)
  • 6–9 AM93%(55 flights)
  • 9 AM–12 PM84%(44 flights)
  • 12–3 PM59%(139 flights)
  • 3–6 PM58%(186 flights)
  • 6–9 PM82%(33 flights)
  • 9 PM–12 AM0%(21 flights)
On-time trend by month
31%
May

Jun 58% → May 31% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%45
July 202569%49
August 202580%59
September 202563%59
October 202552%23
November 202589%26
December 202574%27
January 202683%30
February 202693%28
March 202689%27
April 202641%54
May 202631%64
Departures on time
60%
Diverted
0%
Flights flown
491
Months covered
12

Keep nerding

Based on 493 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.