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Flight Reliability

WN 1644 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1644 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

86%
Arrive within 15 minutes
1 min
Average arrival delay
1.1%
Cancelled
5 min early
Median arrival delay

Based on 435 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon89%(63 flights)
  • Tue88%(68 flights)
  • Wed93%(67 flights)
  • Thu88%(65 flights)
  • Fri88%(64 flights)
  • Sat85%(46 flights)
  • Sun72%(57 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM96%(96 flights)
  • 9 AM–12 PM88%(201 flights)
  • 12–3 PM84%(45 flights)
  • 3–6 PM70%(54 flights)
  • 6–9 PM76%(33 flights)
On-time trend by month
90%
May

Jun 82% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%38
July 202587%38
August 202582%27
September 202592%26
October 202569%35
November 202590%30
December 202571%31
January 202690%29
February 202693%27
March 2026100%39
April 202689%53
May 202690%57
Departures on time
79%
Diverted
0%
Flights flown
430
Months covered
12

Keep nerding

Based on 435 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.