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Flight Reliability

WN 1204 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1204 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

83%
Arrive within 15 minutes
3 min
Average arrival delay
0.7%
Cancelled
7 min early
Median arrival delay

Based on 452 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon90%(68 flights)
  • Tue84%(64 flights)
  • Wed89%(63 flights)
  • Thu79%(72 flights)
  • Fri77%(69 flights)
  • Sat85%(52 flights)
  • Sun76%(58 flights)
On-time by departure window
  • 3–6 AM96%(55 flights)
  • 6–9 AM90%(134 flights)
  • 9 AM–12 PM88%(86 flights)
  • 12–3 PM71%(107 flights)
  • 3–6 PM50%(26 flights)
  • 6–9 PM79%(38 flights)
On-time trend by month
83%
May

Jun 89% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%37
July 202593%43
August 202573%30
September 202593%30
October 202597%31
November 2025100%28
December 202586%29
January 202674%34
February 202679%42
March 202650%46
April 202688%48
May 202683%48
Departures on time
80%
Diverted
0.7%
Flights flown
446
Months covered
12

Keep nerding

Based on 452 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.