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Flight Reliability

WN 3433 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3433 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

72%
Arrive within 15 minutes
13 min
Average arrival delay
0.8%
Cancelled
1 min early
Median arrival delay

Based on 397 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon68%(60 flights)
  • Tue76%(37 flights)
  • Wed70%(40 flights)
  • Thu73%(64 flights)
  • Fri75%(61 flights)
  • Sat72%(71 flights)
  • Sun67%(60 flights)
On-time by departure window
  • 3–6 AM91%(33 flights)
  • 6–9 AM88%(128 flights)
  • 9 AM–12 PM71%(100 flights)
  • 12–3 PM54%(57 flights)
  • 3–6 PM50%(66 flights)
  • 6–9 PM—(8 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
79%
May

Jun 70% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%47
July 202554%48
August 202558%31
September 202572%25
October 202594%50
November 202574%23
December 202575%20
March 202630%27
April 202683%54
May 202679%62
Departures on time
70%
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.