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Flight Reliability

WN 3685 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3685 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
13 min
Average arrival delay
1.3%
Cancelled
1 min early
Median arrival delay

Based on 304 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(50 flights)
  • Tue89%(35 flights)
  • Wed81%(37 flights)
  • Thu64%(52 flights)
  • Fri65%(49 flights)
  • Sat73%(44 flights)
  • Sun72%(29 flights)
On-time by departure window
  • 9 AM–12 PM86%(79 flights)
  • 12–3 PM69%(127 flights)
  • 3–6 PM67%(78 flights)
  • 6–9 PM58%(12 flights)
On-time trend by month
53%
May

Jun 74% → May 53% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%69
July 202583%77
August 202567%21
September 202565%17
October 202582%34
March 202664%14
April 202670%27
May 202653%30
Departures on time
66%
Diverted
1.3%
Flights flown
296
Months covered
10

Keep nerding

Based on 304 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.