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Flight Reliability

WN 1435 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1435 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

83%
Arrive within 15 minutes
3 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 347 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(58 flights)
  • Tue88%(41 flights)
  • Wed91%(34 flights)
  • Thu76%(50 flights)
  • Fri83%(58 flights)
  • Sat87%(45 flights)
  • Sun83%(57 flights)
On-time by departure window
  • 3–6 AM100%(16 flights)
  • 6–9 AM92%(108 flights)
  • 9 AM–12 PM74%(62 flights)
  • 12–3 PM84%(87 flights)
  • 3–6 PM72%(47 flights)
  • 6–9 PM71%(17 flights)
  • 9 PM–12 AM—(6 flights)
On-time trend by month
69%
May

Jun 67% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%43
July 202588%42
August 202588%25
September 202571%21
October 202587%30
November 202584%38
December 202583%59
January 202695%19
February 202681%16
March 202695%21
April 202688%16
May 202669%13
Departures on time
78%
Diverted
0%
Flights flown
343
Months covered
12

Keep nerding

Based on 347 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.