Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1904 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1904 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

78%
Arrive within 15 minutes
5 min
Average arrival delay
0%
Cancelled
5 min early
Median arrival delay

Based on 305 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon81%(37 flights)
  • Tue91%(32 flights)
  • Wed97%(32 flights)
  • Thu76%(37 flights)
  • Fri74%(38 flights)
  • Sat69%(42 flights)
  • Sun72%(87 flights)
On-time by departure window
  • 3–6 AM88%(24 flights)
  • 6–9 AM92%(38 flights)
  • 9 AM–12 PM88%(75 flights)
  • 12–3 PM78%(51 flights)
  • 3–6 PM64%(22 flights)
  • 6–9 PM67%(61 flights)
  • 9 PM–12 AM62%(34 flights)
On-time trend by month
15%
May

Jun 64% → May 15% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202564%25
July 202571%21
August 202580%46
September 202598%46
October 202582%27
November 202590%29
December 202568%31
January 202685%26
February 202689%27
April 202650%10
May 202615%13
Departures on time
74%
Diverted
0%
Flights flown
305
Months covered
12

Keep nerding

Based on 305 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.