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Flight Reliability

WN 1515 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1515 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
8 min
Average arrival delay
0.8%
Cancelled
1 min early
Median arrival delay

Based on 251 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(46 flights)
  • Tue91%(21 flights)
  • Wed89%(18 flights)
  • Thu68%(44 flights)
  • Fri71%(45 flights)
  • Sat75%(32 flights)
  • Sun69%(42 flights)
On-time by departure window
  • 9 AM–12 PM84%(104 flights)
  • 12–3 PM73%(51 flights)
  • 3–6 PM58%(45 flights)
  • 6–9 PM68%(47 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
72%
May

Jun 80% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202580%30
July 202573%30
August 202595%19
September 202563%16
October 202562%37
November 202590%20
December 202588%17
January 202667%12
February 202626%19
March 202693%14
April 202688%16
May 202672%18
Departures on time
67%
Diverted
0.4%
Flights flown
248
Months covered
12

Keep nerding

Based on 251 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.