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Flight Reliability

WN 850 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 850 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

80%
Arrive within 15 minutes
3 min
Average arrival delay
1.5%
Cancelled
4 min early
Median arrival delay

Based on 455 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(78 flights)
  • Tue88%(60 flights)
  • Wed77%(60 flights)
  • Thu76%(79 flights)
  • Fri74%(78 flights)
  • Sat94%(31 flights)
  • Sun87%(62 flights)
On-time by departure window
  • 3–6 AM96%(45 flights)
  • 6–9 AM100%(15 flights)
  • 9 AM–12 PM87%(139 flights)
  • 12–3 PM83%(109 flights)
  • 3–6 PM59%(112 flights)
  • 6–9 PM82%(28 flights)
On-time trend by month
44%
May

Jun 90% → May 44% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%31
July 202581%31
August 202585%74
September 202579%82
October 202574%31
November 202596%28
December 202586%29
January 202688%33
February 202690%29
March 202667%42
April 202655%20
May 202644%18
Departures on time
76%
Diverted
0%
Flights flown
448
Months covered
12

Keep nerding

Based on 455 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.