Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 1918 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1918 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

81%
Arrive within 15 minutes
5 min
Average arrival delay
0.9%
Cancelled
1 min early
Median arrival delay

Based on 433 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon86%(63 flights)
  • Tue83%(53 flights)
  • Wed80%(49 flights)
  • Thu80%(59 flights)
  • Fri79%(66 flights)
  • Sat81%(52 flights)
  • Sun78%(86 flights)
On-time by departure window
  • 3–6 AM98%(60 flights)
  • 6–9 AM94%(18 flights)
  • 9 AM–12 PM84%(132 flights)
  • 12–3 PM97%(29 flights)
  • 3–6 PM72%(97 flights)
  • 6–9 PM65%(92 flights)
On-time trend by month
80%
May

Jun 96% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202596%55
July 202590%61
August 202573%48
September 202570%47
October 202566%32
November 202583%23
December 202569%26
January 202679%29
February 202684%25
April 202685%33
May 202680%45
Departures on time
76%
Diverted
0.2%
Flights flown
428
Months covered
12

Keep nerding

Based on 433 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.