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Flight Reliability

WN 351 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 351 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

77%
Arrive within 15 minutes
9 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 387 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(65 flights)
  • Tue92%(38 flights)
  • Wed89%(35 flights)
  • Thu71%(62 flights)
  • Fri68%(66 flights)
  • Sat80%(50 flights)
  • Sun74%(69 flights)
On-time by departure window
  • 6–9 AM85%(123 flights)
  • 9 AM–12 PM85%(66 flights)
  • 12–3 PM74%(73 flights)
  • 3–6 PM68%(47 flights)
  • 6–9 PM69%(74 flights)
  • 9 PM–12 AM—(2 flights)
On-time trend by month
76%
May

Jun 72% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202572%25
July 202571%21
August 202580%20
September 202556%16
October 202553%30
November 202573%41
December 2025100%42
January 202681%16
February 202679%19
March 202677%69
April 202688%48
May 202676%38
Departures on time
73%
Diverted
0%
Flights flown
385
Months covered
12

Keep nerding

Based on 387 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.