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Flight Reliability

WN 3315 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3315 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

79%
Arrive within 15 minutes
5 min
Average arrival delay
0.3%
Cancelled
4 min early
Median arrival delay

Based on 374 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon91%(55 flights)
  • Tue81%(47 flights)
  • Wed67%(49 flights)
  • Thu75%(56 flights)
  • Fri83%(52 flights)
  • Sat84%(51 flights)
  • Sun72%(60 flights)
On-time by departure window
  • 3–6 AM100%(31 flights)
  • 6–9 AM90%(10 flights)
  • 9 AM–12 PM86%(121 flights)
  • 12–3 PM75%(145 flights)
  • 3–6 PM—(8 flights)
  • 6–9 PM64%(55 flights)
On-time trend by month
61%
May

Jun 83% → May 61% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202559%34
August 202581%48
September 2025100%51
October 202587%31
November 202591%35
December 202588%43
March 202648%31
April 202674%31
May 202661%31
Departures on time
74%
Diverted
0.8%
Flights flown
370
Months covered
11

Keep nerding

Based on 374 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.