Skip to content
WanderNerd
Check a flight

Flight Reliability

WN 171 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 171 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

90%
Arrive within 15 minutes
3 min early
Average arrival delay
0.5%
Cancelled
9 min early
Median arrival delay

Based on 421 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon92%(72 flights)
  • Tue92%(49 flights)
  • Wed96%(49 flights)
  • Thu92%(71 flights)
  • Fri93%(69 flights)
  • Sat84%(45 flights)
  • Sun81%(63 flights)
On-time by departure window
  • 3–6 AM97%(35 flights)
  • 6–9 AM92%(204 flights)
  • 9 AM–12 PM94%(112 flights)
  • 12–3 PM85%(20 flights)
  • 3–6 PM68%(28 flights)
  • 6–9 PM72%(18 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
94%
May

Jun 85% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%59
July 202590%58
August 202592%48
September 202595%43
October 202594%18
November 202585%27
December 202561%18
January 202690%29
February 2026100%31
March 202689%27
April 202697%29
May 202694%31
Departures on time
86%
Diverted
0.2%
Flights flown
418
Months covered
12

Keep nerding

Based on 421 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.