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Flight Reliability

WN 403 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 403 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

75%
Arrive within 15 minutes
9 min
Average arrival delay
0.6%
Cancelled
4 min early
Median arrival delay

Based on 353 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(47 flights)
  • Tue90%(38 flights)
  • Wed80%(39 flights)
  • Thu71%(49 flights)
  • Fri78%(49 flights)
  • Sat87%(55 flights)
  • Sun63%(73 flights)
On-time by departure window
  • 6–9 AM98%(42 flights)
  • 9 AM–12 PM88%(75 flights)
  • 12–3 PM67%(69 flights)
  • 3–6 PM70%(113 flights)
  • 6–9 PM71%(21 flights)
  • 9 PM–12 AM57%(30 flights)
On-time trend by month
65%
May

Jun 72% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%39
July 202560%37
August 202579%34
September 202590%30
November 202587%39
December 202569%45
January 2026100%14
February 202694%18
March 202654%28
April 202680%30
May 202665%31
Departures on time
71%
Diverted
0.3%
Flights flown
350
Months covered
12

Keep nerding

Based on 353 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.