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Flight Reliability

WN 646 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 646 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

84%
Arrive within 15 minutes
3 min
Average arrival delay
0.5%
Cancelled
6 min early
Median arrival delay

Based on 383 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(50 flights)
  • Tue92%(59 flights)
  • Wed92%(61 flights)
  • Thu78%(50 flights)
  • Fri90%(48 flights)
  • Sat87%(55 flights)
  • Sun75%(56 flights)
On-time by departure window
  • 3–6 AM96%(53 flights)
  • 6–9 AM91%(98 flights)
  • 9 AM–12 PM83%(59 flights)
  • 12–3 PM86%(62 flights)
  • 3–6 PM83%(40 flights)
  • 6–9 PM67%(67 flights)
On-time trend by month
94%
May

Jun 68% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%34
July 202585%33
August 202559%29
September 202589%26
October 202587%31
November 202587%30
December 202590%31
January 202693%45
February 202670%23
March 202684%31
April 2026100%33
May 202694%33
Departures on time
81%
Diverted
0.5%
Flights flown
379
Months covered
12

Keep nerding

Based on 383 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.