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Flight Reliability

WN 1120 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1120 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
0.5%
Cancelled
3 min early
Median arrival delay

Based on 384 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon72%(57 flights)
  • Tue78%(50 flights)
  • Wed86%(51 flights)
  • Thu76%(62 flights)
  • Fri77%(57 flights)
  • Sat74%(49 flights)
  • Sun78%(55 flights)
On-time by departure window
  • 3–6 AM87%(15 flights)
  • 6–9 AM93%(144 flights)
  • 9 AM–12 PM85%(34 flights)
  • 12–3 PM85%(20 flights)
  • 3–6 PM77%(48 flights)
  • 6–9 PM53%(112 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
77%
May

Jun 57% → May 77% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202557%30
July 202540%30
August 202587%31
September 202597%30
October 202582%61
November 202574%31
December 202574%23
January 202696%27
February 202692%25
March 202685%27
April 202666%32
May 202677%34
Departures on time
71%
Diverted
0.3%
Flights flown
381
Months covered
12

Keep nerding

Based on 384 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.