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Flight Reliability

WN 312 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 312 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

88%
Arrive within 15 minutes
2 min early
Average arrival delay
1.3%
Cancelled
10 min early
Median arrival delay

Based on 604 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(84 flights)
  • Tue87%(98 flights)
  • Wed86%(95 flights)
  • Thu91%(81 flights)
  • Fri97%(91 flights)
  • Sat80%(75 flights)
  • Sun80%(70 flights)
On-time by departure window
  • 3–6 AM93%(30 flights)
  • 6–9 AM95%(180 flights)
  • 9 AM–12 PM89%(184 flights)
  • 12–3 PM86%(93 flights)
  • 3–6 PM76%(83 flights)
  • 6–9 PM71%(24 flights)
On-time trend by month
87%
May

Jun 76% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%33
July 202577%35
August 202586%42
September 202586%43
October 202588%40
November 202589%53
December 202583%54
January 202694%70
February 202692%65
March 202694%68
April 202689%46
May 202687%45
Departures on time
86%
Diverted
0.3%
Flights flown
594
Months covered
12

Keep nerding

Based on 604 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.