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Flight Reliability

WN 1665 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1665 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
4 min
Average arrival delay
0.7%
Cancelled
6 min early
Median arrival delay

Based on 267 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(40 flights)
  • Tue86%(29 flights)
  • Wed83%(30 flights)
  • Thu83%(41 flights)
  • Fri74%(38 flights)
  • Sat79%(42 flights)
  • Sun64%(45 flights)
On-time by departure window
  • 3–6 AM100%(16 flights)
  • 6–9 AM94%(47 flights)
  • 9 AM–12 PM83%(59 flights)
  • 12–3 PM68%(44 flights)
  • 3–6 PM64%(52 flights)
  • 6–9 PM77%(43 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
76%
Mar

Jun 82% → Mar 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%33
July 202580%30
October 202559%22
November 202581%53
December 202588%51
January 202664%14
February 202673%22
March 202676%29
Departures on time
73%
Diverted
0%
Flights flown
265
Months covered
11

Keep nerding

Based on 267 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.