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Flight Reliability

WN 3337 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3337 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

73%
Arrive within 15 minutes
10 min
Average arrival delay
0.5%
Cancelled
2 min early
Median arrival delay

Based on 386 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon69%(52 flights)
  • Tue87%(53 flights)
  • Wed69%(55 flights)
  • Thu72%(54 flights)
  • Fri71%(52 flights)
  • Sat77%(61 flights)
  • Sun68%(56 flights)
On-time by departure window
  • 3–6 AM94%(49 flights)
  • 6–9 AM93%(80 flights)
  • 9 AM–12 PM85%(79 flights)
  • 12–3 PM44%(25 flights)
  • 3–6 PM51%(51 flights)
  • 6–9 PM57%(77 flights)
  • 9 PM–12 AM59%(22 flights)
On-time trend by month
72%
May

Jun 58% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%40
July 202549%45
August 202554%24
September 202586%21
October 202581%21
November 202583%40
December 202585%47
January 202688%32
February 202685%27
April 202680%35
May 202672%43
Departures on time
72%
Diverted
0.3%
Flights flown
383
Months covered
12

Keep nerding

Based on 386 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.