Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 3428 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 3428 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

68%
Arrive within 15 minutes
11 min
Average arrival delay
0.7%
Cancelled
2 min early
Median arrival delay

Based on 273 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon53%(34 flights)
  • Tue86%(36 flights)
  • Wed87%(37 flights)
  • Thu67%(36 flights)
  • Fri74%(38 flights)
  • Sat66%(58 flights)
  • Sun44%(32 flights)
On-time by departure window
  • 6–9 AM97%(38 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM53%(58 flights)
  • 3–6 PM67%(84 flights)
  • 6–9 PM66%(65 flights)
  • 9 PM–12 AM68%(25 flights)
On-time trend by month
39%
May

Jun 58% → May 39% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202558%31
July 202567%30
August 202580%30
September 202583%30
October 202583%18
November 202557%23
December 202553%17
January 202691%23
February 202677%17
March 202655%11
April 202667%18
May 202639%23
Departures on time
64%
Diverted
0%
Flights flown
271
Months covered
12

Keep nerding

Based on 273 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.