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Flight Reliability

WN 1646 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1646 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

74%
Arrive within 15 minutes
10 min
Average arrival delay
2.1%
Cancelled
2 min early
Median arrival delay

Based on 419 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(61 flights)
  • Tue76%(59 flights)
  • Wed76%(49 flights)
  • Thu67%(48 flights)
  • Fri82%(67 flights)
  • Sat67%(60 flights)
  • Sun77%(66 flights)
On-time by departure window
  • 6–9 AM88%(76 flights)
  • 9 AM–12 PM78%(86 flights)
  • 12–3 PM83%(82 flights)
  • 3–6 PM84%(49 flights)
  • 6–9 PM58%(84 flights)
  • 9 PM–12 AM33%(33 flights)
On-time trend by month
91%
Mar

Jun 47% → Mar 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%30
July 202543%30
August 202566%35
September 202585%34
October 202552%25
November 202580%56
December 202580%86
January 202679%43
February 202684%32
March 202691%32
Departures on time
72%
Diverted
0%
Flights flown
410
Months covered
12

Keep nerding

Based on 419 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.