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Flight Reliability

WN 677 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 677 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

85%
Arrive within 15 minutes
0 min
Average arrival delay
0.9%
Cancelled
8 min early
Median arrival delay

Based on 423 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon85%(65 flights)
  • Tue87%(60 flights)
  • Wed82%(60 flights)
  • Thu93%(68 flights)
  • Fri82%(66 flights)
  • Sat84%(37 flights)
  • Sun81%(63 flights)
On-time by departure window
  • 6–9 AM91%(134 flights)
  • 9 AM–12 PM81%(16 flights)
  • 12–3 PM84%(57 flights)
  • 3–6 PM90%(78 flights)
  • 6–9 PM76%(134 flights)
On-time trend by month
77%
May

Jun 82% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%28
July 202597%32
August 202576%49
September 202591%55
October 202590%30
November 202589%27
December 202589%28
January 202686%29
February 202693%27
March 202673%30
April 202680%40
May 202677%44
Departures on time
81%
Diverted
0%
Flights flown
419
Months covered
12

Keep nerding

Based on 423 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.