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Flight Reliability

WN 3318 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3318 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

76%
Arrive within 15 minutes
6 min
Average arrival delay
1.3%
Cancelled
1 min early
Median arrival delay

Based on 315 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon73%(44 flights)
  • Tue77%(43 flights)
  • Wed81%(43 flights)
  • Thu71%(45 flights)
  • Fri71%(44 flights)
  • Sat80%(44 flights)
  • Sun81%(48 flights)
On-time by departure window
  • 6–9 AM88%(117 flights)
  • 9 AM–12 PM82%(45 flights)
  • 12–3 PM65%(52 flights)
  • 3–6 PM78%(32 flights)
  • 6–9 PM80%(20 flights)
  • 9 PM–12 AM49%(45 flights)
On-time trend by month
55%
May

Jun 81% → May 55% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%31
July 202571%31
August 202577%35
September 202582%34
October 202589%18
November 202579%14
December 202588%25
March 202681%53
April 202662%37
May 202655%29
Departures on time
74%
Diverted
0%
Flights flown
311
Months covered
11

Keep nerding

Based on 315 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.