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Flight Reliability

WN 1879 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1879 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

70%
Arrive within 15 minutes
13 min
Average arrival delay
1.4%
Cancelled
1 min
Median arrival delay

Based on 359 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon54%(43 flights)
  • Tue81%(36 flights)
  • Wed70%(37 flights)
  • Thu47%(49 flights)
  • Fri68%(47 flights)
  • Sat83%(63 flights)
  • Sun80%(78 flights)
On-time by departure window
  • 6–9 AM100%(17 flights)
  • 9 AM–12 PM94%(68 flights)
  • 12–3 PM64%(94 flights)
  • 3–6 PM48%(65 flights)
  • 6–9 PM71%(99 flights)
  • 9 PM–12 AM50%(10 flights)
On-time trend by month
66%
May

Jun 50% → May 66% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%34
July 202567%33
August 202574%19
September 202588%17
October 202544%23
November 202584%25
December 202568%22
January 202667%12
February 202682%22
March 202684%25
April 202678%54
May 202666%67
Departures on time
62%
Diverted
0.3%
Flights flown
353
Months covered
12

Keep nerding

Based on 359 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.