Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 3743 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3743 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
2 min early
Average arrival delay
1.6%
Cancelled
10 min early
Median arrival delay

Based on 250 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(28 flights)
  • Tue87%(52 flights)
  • Wed80%(54 flights)
  • Thu90%(29 flights)
  • Fri80%(30 flights)
  • Sat89%(27 flights)
  • Sun77%(26 flights)
On-time by departure window
  • 6–9 AM96%(102 flights)
  • 9 AM–12 PM73%(15 flights)
  • 12–3 PM78%(45 flights)
  • 3–6 PM67%(24 flights)
  • 6–9 PM80%(51 flights)
  • 9 PM–12 AM—(9 flights)
On-time trend by month
73%
May

Jun 100% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%26
July 202594%31
August 202592%12
September 2025100%10
October 202597%31
January 202686%22
February 202675%24
April 202670%37
May 202673%40
Departures on time
80%
Diverted
0%
Flights flown
246
Months covered
12

Keep nerding

Based on 250 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.