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Flight Reliability

WN 1178 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1178 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

75%
Arrive within 15 minutes
10 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 420 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(75 flights)
  • Tue83%(52 flights)
  • Wed90%(52 flights)
  • Thu69%(75 flights)
  • Fri70%(70 flights)
  • Sat80%(40 flights)
  • Sun71%(51 flights)
On-time by departure window
  • 3–6 AM98%(54 flights)
  • 6–9 AM93%(54 flights)
  • 9 AM–12 PM79%(58 flights)
  • 12–3 PM—(6 flights)
  • 3–6 PM67%(67 flights)
  • 6–9 PM64%(159 flights)
  • 9 PM–12 AM53%(17 flights)
On-time trend by month
94%
May

Jun 43% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202543%54
July 202567%52
August 202532%31
September 202573%26
October 202585%27
November 202597%29
December 2025100%31
January 202690%29
February 2026100%25
March 202685%46
April 202665%34
May 202694%31
Departures on time
72%
Diverted
0%
Flights flown
415
Months covered
12

Keep nerding

Based on 420 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.