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Flight Reliability

WN 1843 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1843 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
0.9%
Cancelled
5 min early
Median arrival delay

Based on 460 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(80 flights)
  • Tue93%(58 flights)
  • Wed92%(60 flights)
  • Thu79%(84 flights)
  • Fri82%(78 flights)
  • Sat77%(43 flights)
  • Sun72%(53 flights)
On-time by departure window
  • 3–6 AM—(8 flights)
  • 6–9 AM92%(171 flights)
  • 9 AM–12 PM81%(128 flights)
  • 12–3 PM68%(79 flights)
  • 3–6 PM65%(23 flights)
  • 6–9 PM70%(47 flights)
On-time trend by month
87%
May

Jun 70% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%37
July 202575%40
August 202565%54
September 202589%56
October 202586%43
November 202592%38
December 202573%44
January 202678%32
February 202694%35
March 202679%19
April 202693%27
May 202687%31
Departures on time
81%
Diverted
0%
Flights flown
456
Months covered
12

Keep nerding

Based on 460 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.