Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1428 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1428 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

77%
Arrive within 15 minutes
7 min
Average arrival delay
0.3%
Cancelled
4 min early
Median arrival delay

Based on 318 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(36 flights)
  • Tue75%(55 flights)
  • Wed83%(52 flights)
  • Thu77%(35 flights)
  • Fri70%(33 flights)
  • Sat80%(49 flights)
  • Sun81%(57 flights)
On-time by departure window
  • 3–6 AM90%(51 flights)
  • 6–9 AM99%(77 flights)
  • 9 AM–12 PM75%(20 flights)
  • 12–3 PM80%(74 flights)
  • 3–6 PM40%(43 flights)
  • 6–9 PM62%(52 flights)
On-time trend by month
94%
May

Jun 74% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202574%31
July 202567%30
August 202578%27
September 202588%25
October 202580%39
November 202575%36
December 202573%40
January 202660%10
February 202633%15
March 202694%31
April 2026100%16
May 202694%17
Departures on time
77%
Diverted
0%
Flights flown
317
Months covered
12

Keep nerding

Based on 318 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.