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Flight Reliability

WN 670 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 670 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

66%
Arrive within 15 minutes
18 min
Average arrival delay
0.8%
Cancelled
3 min
Median arrival delay

Based on 359 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon55%(47 flights)
  • Tue70%(50 flights)
  • Wed65%(48 flights)
  • Thu70%(47 flights)
  • Fri62%(52 flights)
  • Sat79%(52 flights)
  • Sun63%(60 flights)
On-time by departure window
  • 3–6 AM100%(19 flights)
  • 6–9 AM97%(30 flights)
  • 9 AM–12 PM89%(70 flights)
  • 12–3 PM73%(30 flights)
  • 3–6 PM46%(116 flights)
  • 6–9 PM57%(86 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
36%
May

Jun 38% → May 36% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202538%29
July 202541%29
August 202584%31
September 202597%30
October 202571%48
November 202580%20
December 202558%19
January 202697%30
February 202693%28
March 202661%31
April 202640%30
May 202636%31
Departures on time
64%
Diverted
0%
Flights flown
356
Months covered
12

Keep nerding

Based on 359 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.