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Flight Reliability

WN 2877 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2877 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

71%
Arrive within 15 minutes
11 min
Average arrival delay
2.1%
Cancelled
1 min
Median arrival delay

Based on 388 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(80 flights)
  • Tue69%(36 flights)
  • Wed74%(35 flights)
  • Thu65%(77 flights)
  • Fri71%(75 flights)
  • Sat74%(39 flights)
  • Sun66%(38 flights)
On-time by departure window
  • 6–9 AM96%(105 flights)
  • 9 AM–12 PM69%(49 flights)
  • 12–3 PM64%(45 flights)
  • 3–6 PM61%(95 flights)
  • 6–9 PM53%(78 flights)
  • 9 PM–12 AM—(8 flights)
On-time trend by month
85%
May

Jun 59% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%71
July 202575%76
August 202554%41
September 202550%34
October 2025100%31
December 2025100%11
January 202675%28
February 202668%28
March 202682%27
April 202667%15
May 202685%13
Departures on time
67%
Diverted
0%
Flights flown
380
Months covered
12

Keep nerding

Based on 388 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.