Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1420 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1420 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
9 min
Average arrival delay
0.3%
Cancelled
2 min early
Median arrival delay

Based on 294 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon74%(43 flights)
  • Tue80%(40 flights)
  • Wed88%(40 flights)
  • Thu73%(44 flights)
  • Fri67%(42 flights)
  • Sat76%(42 flights)
  • Sun83%(41 flights)
On-time by departure window
  • 9 AM–12 PM88%(90 flights)
  • 12–3 PM77%(31 flights)
  • 3–6 PM64%(83 flights)
  • 6–9 PM78%(88 flights)
On-time trend by month
78%
May

Jun 50% → May 78% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%26
July 202570%27
August 202573%22
September 202595%21
October 202567%18
November 202578%27
December 202569%29
January 202687%30
February 202696%28
March 202681%21
April 202680%20
May 202678%23
Departures on time
73%
Diverted
0.3%
Flights flown
292
Months covered
12

Keep nerding

Based on 294 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.