Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 353 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 353 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

80%
Arrive within 15 minutes
4 min
Average arrival delay
0.5%
Cancelled
7 min early
Median arrival delay

Based on 390 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(51 flights)
  • Tue87%(54 flights)
  • Wed91%(55 flights)
  • Thu71%(52 flights)
  • Fri78%(51 flights)
  • Sat79%(70 flights)
  • Sun77%(52 flights)
On-time by departure window
  • 3–6 AM96%(54 flights)
  • 6–9 AM90%(81 flights)
  • 9 AM–12 PM89%(85 flights)
  • 12–3 PM83%(87 flights)
  • 3–6 PM—(9 flights)
  • 6–9 PM45%(56 flights)
  • 9 PM–12 AM54%(13 flights)
On-time trend by month
97%
May

Jun 48% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202532%31
August 202584%31
September 202597%29
October 202571%31
November 202587%31
December 202589%35
January 202687%37
February 202687%31
March 202687%38
April 202694%31
May 202697%31
Departures on time
80%
Diverted
0.8%
Flights flown
385
Months covered
12

Keep nerding

Based on 390 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.