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Flight Reliability

WN 2135 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2135 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

78%
Arrive within 15 minutes
7 min
Average arrival delay
1.1%
Cancelled
3 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(58 flights)
  • Tue88%(34 flights)
  • Wed91%(33 flights)
  • Thu67%(57 flights)
  • Fri83%(60 flights)
  • Sat73%(48 flights)
  • Sun76%(55 flights)
On-time by departure window
  • 3–6 AM97%(31 flights)
  • 6–9 AM97%(57 flights)
  • 9 AM–12 PM79%(95 flights)
  • 12–3 PM66%(44 flights)
  • 3–6 PM71%(100 flights)
  • 6–9 PM44%(18 flights)
On-time trend by month
97%
May

Jun 74% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%23
July 202576%21
August 202577%22
September 202586%21
October 202563%41
November 202567%39
December 202562%34
January 202690%30
February 202656%25
March 2026100%30
April 202693%29
May 202697%30
Departures on time
73%
Diverted
0.3%
Flights flown
345
Months covered
12

Keep nerding

Based on 350 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.