Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1688 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1688 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

75%
Arrive within 15 minutes
12 min
Average arrival delay
0.8%
Cancelled
3 min early
Median arrival delay

Based on 367 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon80%(60 flights)
  • Tue78%(50 flights)
  • Wed82%(50 flights)
  • Thu60%(60 flights)
  • Fri73%(59 flights)
  • Sat86%(36 flights)
  • Sun70%(46 flights)
On-time by departure window
  • 3–6 AM100%(22 flights)
  • 6–9 AM93%(87 flights)
  • 9 AM–12 PM65%(23 flights)
  • 12–3 PM78%(112 flights)
  • 3–6 PM58%(87 flights)
  • 6–9 PM61%(18 flights)
  • 9 PM–12 AM33%(12 flights)
On-time trend by month
50%
May

Jun 63% → May 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%30
July 202565%31
August 202581%26
September 202584%25
October 2025100%13
November 202567%27
December 202564%28
January 202692%26
February 2026100%26
March 202681%42
April 202679%43
May 202650%44
Departures on time
70%
Diverted
0.8%
Flights flown
361
Months covered
12

Keep nerding

Based on 367 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.