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Flight Reliability

WN 3356 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3356 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
7 min
Average arrival delay
0.6%
Cancelled
4 min early
Median arrival delay

Based on 308 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon65%(51 flights)
  • Tue81%(41 flights)
  • Wed90%(39 flights)
  • Thu80%(49 flights)
  • Fri80%(51 flights)
  • Sat90%(31 flights)
  • Sun65%(43 flights)
On-time by departure window
  • 3–6 AM97%(38 flights)
  • 6–9 AM89%(36 flights)
  • 9 AM–12 PM91%(42 flights)
  • 12–3 PM61%(54 flights)
  • 3–6 PM77%(61 flights)
  • 6–9 PM76%(66 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
65%
May

Jun 84% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202584%31
July 202594%31
August 2025100%16
September 202575%12
October 202563%43
November 202589%18
December 202553%15
January 202686%29
February 2026100%17
March 202678%32
April 202663%30
May 202665%31
Departures on time
70%
Diverted
0.3%
Flights flown
305
Months covered
12

Keep nerding

Based on 308 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.