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Flight Reliability

WN 4035 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4035 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

81%
Arrive within 15 minutes
4 min
Average arrival delay
0%
Cancelled
1 min early
Median arrival delay

Based on 221 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(42 flights)
  • Tue92%(24 flights)
  • Wed82%(22 flights)
  • Thu68%(40 flights)
  • Fri80%(40 flights)
  • Sat88%(16 flights)
  • Sun87%(37 flights)
On-time by departure window
  • 3–6 AM69%(13 flights)
  • 6–9 AM83%(65 flights)
  • 9 AM–12 PM90%(50 flights)
  • 12–3 PM68%(34 flights)
  • 3–6 PM83%(42 flights)
  • 6–9 PM71%(17 flights)
On-time trend by month
88%
May

Jun 40% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202540%15
July 202558%12
October 2025100%30
November 202596%26
December 202562%29
January 202684%19
February 202676%38
April 202691%21
May 202688%25
Departures on time
81%
Diverted
0%
Flights flown
221
Months covered
11

Keep nerding

Based on 221 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.