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Flight Reliability

WN 3178 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3178 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

87%
Arrive within 15 minutes
1 min early
Average arrival delay
2.0%
Cancelled
9 min early
Median arrival delay

Based on 397 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon83%(59 flights)
  • Tue93%(53 flights)
  • Wed96%(52 flights)
  • Thu85%(59 flights)
  • Fri90%(57 flights)
  • Sat83%(46 flights)
  • Sun81%(62 flights)
On-time by departure window
  • 6–9 AM92%(119 flights)
  • 9 AM–12 PM95%(19 flights)
  • 12–3 PM90%(99 flights)
  • 3–6 PM81%(103 flights)
  • 6–9 PM88%(41 flights)
  • 9 PM–12 AM—(7 flights)
On-time trend by month
63%
May

Jun 100% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%29
July 2025100%27
August 202594%46
September 202598%47
October 202597%31
November 202586%29
December 202584%31
January 202691%33
February 202688%25
March 202655%31
April 202679%29
May 202663%30
Departures on time
81%
Diverted
0.3%
Flights flown
388
Months covered
12

Keep nerding

Based on 397 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.