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Flight Reliability

WN 3255 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3255 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

84%
Arrive within 15 minutes
0 min
Average arrival delay
0.8%
Cancelled
7 min early
Median arrival delay

Based on 397 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(65 flights)
  • Tue89%(52 flights)
  • Wed83%(52 flights)
  • Thu78%(63 flights)
  • Fri80%(65 flights)
  • Sat82%(39 flights)
  • Sun93%(57 flights)
On-time by departure window
  • 6–9 AM93%(97 flights)
  • 9 AM–12 PM85%(135 flights)
  • 12–3 PM89%(55 flights)
  • 3–6 PM79%(70 flights)
  • 6–9 PM—(8 flights)
  • 9 PM–12 AM57%(28 flights)
On-time trend by month
94%
May

Jun 88% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202588%41
July 202574%43
August 202583%23
September 202573%22
October 202586%44
November 202574%53
December 202590%39
January 202694%33
February 202694%18
March 202662%13
April 202693%29
May 202694%35
Departures on time
80%
Diverted
0.3%
Flights flown
393
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.