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Flight Reliability

WN 1817 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1817 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
2 min
Average arrival delay
0.4%
Cancelled
8 min early
Median arrival delay

Based on 461 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon75%(67 flights)
  • Tue87%(70 flights)
  • Wed89%(71 flights)
  • Thu81%(67 flights)
  • Fri82%(65 flights)
  • Sat81%(42 flights)
  • Sun72%(75 flights)
On-time by departure window
  • 6–9 AM95%(91 flights)
  • 9 AM–12 PM94%(70 flights)
  • 12–3 PM78%(186 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM73%(85 flights)
  • 9 PM–12 AM33%(21 flights)
On-time trend by month
69%
May

Jun 61% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202561%28
July 202533%24
August 202568%31
September 202593%28
October 202582%28
November 202578%27
December 202576%29
January 202689%91
February 202697%70
March 202692%39
April 202680%30
May 202669%32
Departures on time
75%
Diverted
0.4%
Flights flown
457
Months covered
12

Keep nerding

Based on 461 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.