Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 276 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 276 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

79%
Arrive within 15 minutes
6 min
Average arrival delay
1.2%
Cancelled
4 min early
Median arrival delay

Based on 412 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(56 flights)
  • Tue89%(73 flights)
  • Wed80%(73 flights)
  • Thu77%(56 flights)
  • Fri72%(54 flights)
  • Sat89%(47 flights)
  • Sun64%(47 flights)
On-time by departure window
  • 3–6 AM100%(18 flights)
  • 6–9 AM93%(61 flights)
  • 9 AM–12 PM58%(125 flights)
  • 12–3 PM82%(130 flights)
  • 3–6 PM85%(26 flights)
  • 6–9 PM91%(46 flights)
On-time trend by month
23%
May

Jun 100% → May 23% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%32
July 202589%37
August 202589%37
September 202587%38
October 202584%43
November 202593%30
December 202581%31
January 202690%30
February 202685%27
March 202674%39
April 202641%32
May 202623%30
Departures on time
75%
Diverted
0.2%
Flights flown
406
Months covered
12

Keep nerding

Based on 412 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.