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Flight Reliability

WN 3852 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3852 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

76%
Arrive within 15 minutes
11 min
Average arrival delay
1.1%
Cancelled
1 min early
Median arrival delay

Based on 274 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(42 flights)
  • Tue82%(39 flights)
  • Wed89%(35 flights)
  • Thu83%(35 flights)
  • Fri65%(40 flights)
  • Sat75%(36 flights)
  • Sun66%(44 flights)
On-time by departure window
  • 6–9 AM96%(135 flights)
  • 9 AM–12 PM94%(17 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM48%(48 flights)
  • 6–9 PM54%(48 flights)
  • 9 PM–12 AM36%(14 flights)
On-time trend by month
97%
May

Jun 68% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%31
July 202564%28
October 202586%29
November 202585%33
December 202549%49
March 202696%27
April 202697%30
May 202697%31
Departures on time
68%
Diverted
0%
Flights flown
271
Months covered
10

Keep nerding

Based on 274 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.