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Flight Reliability

WN 990 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 990 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

87%
Arrive within 15 minutes
0 min
Average arrival delay
0.5%
Cancelled
6 min early
Median arrival delay

Based on 392 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(53 flights)
  • Tue87%(71 flights)
  • Wed89%(73 flights)
  • Thu91%(53 flights)
  • Fri89%(56 flights)
  • Sat92%(39 flights)
  • Sun80%(44 flights)
On-time by departure window
  • 6–9 AM96%(97 flights)
  • 9 AM–12 PM88%(81 flights)
  • 12–3 PM86%(57 flights)
  • 3–6 PM83%(86 flights)
  • 6–9 PM64%(36 flights)
  • 9 PM–12 AM94%(32 flights)
On-time trend by month
77%
May

Jun 81% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202581%31
July 202570%37
August 202594%31
September 202597%29
October 202594%34
November 202585%40
December 202597%31
January 202682%44
February 202682%34
March 202694%32
April 202692%24
May 202677%22
Departures on time
85%
Diverted
0.3%
Flights flown
389
Months covered
12

Keep nerding

Based on 392 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.