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Flight Reliability

WN 3797 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3797 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

75%
Arrive within 15 minutes
9 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 372 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(48 flights)
  • Tue75%(55 flights)
  • Wed80%(56 flights)
  • Thu67%(48 flights)
  • Fri77%(48 flights)
  • Sat81%(48 flights)
  • Sun75%(68 flights)
On-time by departure window
  • 3–6 AM98%(56 flights)
  • 6–9 AM95%(39 flights)
  • 9 AM–12 PM92%(37 flights)
  • 12–3 PM68%(72 flights)
  • 3–6 PM62%(65 flights)
  • 6–9 PM63%(102 flights)
On-time trend by month
59%
May

Jun 58% → May 59% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%38
July 202563%38
August 202585%33
September 2025100%29
October 202595%39
November 202575%28
December 202568%31
January 202686%22
February 202694%16
March 202659%34
April 202677%31
May 202659%32
Departures on time
69%
Diverted
0%
Flights flown
371
Months covered
12

Keep nerding

Based on 372 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.