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Flight Reliability

WN 3677 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3677 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

62%
Arrive within 15 minutes
22 min
Average arrival delay
0%
Cancelled
3 min
Median arrival delay

Based on 279 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon56%(41 flights)
  • Tue70%(33 flights)
  • Wed72%(32 flights)
  • Thu51%(41 flights)
  • Fri58%(40 flights)
  • Sat75%(47 flights)
  • Sun58%(45 flights)
On-time by departure window
  • 3–6 AM93%(14 flights)
  • 6–9 AM84%(57 flights)
  • 9 AM–12 PM86%(35 flights)
  • 12–3 PM36%(80 flights)
  • 3–6 PM77%(35 flights)
  • 6–9 PM48%(54 flights)
  • 9 PM–12 AM—(4 flights)
On-time trend by month
12%
May

Jun 58% → May 12% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%33
July 202561%31
August 202570%20
September 202577%17
October 202577%30
January 202682%28
February 202686%35
March 2026100%13
April 202631%29
May 202612%34
Departures on time
62%
Diverted
0%
Flights flown
279
Months covered
12

Keep nerding

Based on 279 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.