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Flight Reliability

WN 2120 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2120 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

80%
Arrive within 15 minutes
6 min
Average arrival delay
0.7%
Cancelled
4 min early
Median arrival delay

Based on 552 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon78%(95 flights)
  • Tue72%(75 flights)
  • Wed85%(71 flights)
  • Thu74%(86 flights)
  • Fri87%(95 flights)
  • Sat87%(70 flights)
  • Sun80%(54 flights)
On-time by departure window
  • 3–6 AM—(9 flights)
  • 6–9 AM94%(164 flights)
  • 9 AM–12 PM89%(72 flights)
  • 12–3 PM76%(117 flights)
  • 3–6 PM73%(117 flights)
  • 6–9 PM61%(66 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
56%
May

Jun 75% → May 56% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202575%68
July 202578%73
August 202587%60
September 202587%60
October 2025100%32
November 202571%24
December 202571%35
January 202690%31
February 202690%39
March 202687%31
April 202681%43
May 202656%50
Departures on time
75%
Diverted
0.4%
Flights flown
546
Months covered
12

Keep nerding

Based on 552 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.