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Flight Reliability

WN 1517 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1517 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

79%
Arrive within 15 minutes
4 min
Average arrival delay
0.8%
Cancelled
7 min early
Median arrival delay

Based on 383 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(53 flights)
  • Tue83%(52 flights)
  • Wed77%(52 flights)
  • Thu77%(53 flights)
  • Fri80%(55 flights)
  • Sat85%(53 flights)
  • Sun77%(62 flights)
On-time by departure window
  • 3–6 AM86%(14 flights)
  • 6–9 AM84%(51 flights)
  • 9 AM–12 PM94%(65 flights)
  • 12–3 PM92%(12 flights)
  • 3–6 PM69%(49 flights)
  • 6–9 PM65%(128 flights)
  • 9 PM–12 AM92%(61 flights)
On-time trend by month
33%
May

Jun 94% → May 33% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202594%33
July 202587%31
August 202578%23
September 202567%21
October 202594%16
November 202591%43
December 202581%37
January 202678%50
February 202679%34
March 202691%32
April 202670%30
May 202633%30
Departures on time
74%
Diverted
0%
Flights flown
380
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.