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Flight Reliability

WN 1670 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1670 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

75%
Arrive within 15 minutes
11 min
Average arrival delay
1.7%
Cancelled
2 min early
Median arrival delay

Based on 463 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon82%(61 flights)
  • Tue85%(66 flights)
  • Wed72%(67 flights)
  • Thu75%(64 flights)
  • Fri73%(59 flights)
  • Sat74%(69 flights)
  • Sun66%(67 flights)
On-time by departure window
  • 3–6 AM100%(29 flights)
  • 6–9 AM91%(53 flights)
  • 9 AM–12 PM90%(92 flights)
  • 12–3 PM86%(64 flights)
  • 3–6 PM71%(89 flights)
  • 6–9 PM49%(102 flights)
  • 9 PM–12 AM50%(24 flights)
On-time trend by month
39%
May

Jun 56% → May 39% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%43
July 202550%44
August 202553%30
September 202573%26
October 202585%27
November 202595%38
December 202591%45
January 202693%44
February 202685%54
March 202692%39
April 202675%32
May 202639%31
Departures on time
74%
Diverted
0.4%
Flights flown
453
Months covered
12

Keep nerding

Based on 463 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.