Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 3777 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3777 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

78%
Arrive within 15 minutes
9 min
Average arrival delay
0.5%
Cancelled
4 min early
Median arrival delay

Based on 199 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(25 flights)
  • Tue100%(25 flights)
  • Wed92%(25 flights)
  • Thu74%(27 flights)
  • Fri82%(28 flights)
  • Sat74%(34 flights)
  • Sun59%(34 flights)
On-time by departure window
  • 6–9 AM100%(47 flights)
  • 9 AM–12 PM91%(23 flights)
  • 12–3 PM83%(23 flights)
  • 3–6 PM57%(14 flights)
  • 6–9 PM59%(59 flights)
  • 9 PM–12 AM78%(32 flights)
On-time trend by month
96%
May

Jun 75% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%24
July 202558%26
August 202567%33
September 202579%34
October 202570%10
February 202683%12
April 2026100%21
May 202696%26
Departures on time
69%
Diverted
0%
Flights flown
198
Months covered
11

Keep nerding

Based on 199 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.