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Flight Reliability

WN 37 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 37 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

70%
Arrive within 15 minutes
10 min
Average arrival delay
1.4%
Cancelled
4 min early
Median arrival delay

Based on 213 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon67%(36 flights)
  • Tue64%(25 flights)
  • Wed64%(28 flights)
  • Thu69%(39 flights)
  • Fri66%(35 flights)
  • Sat81%(42 flights)
  • Sun—(5 flights)
On-time by departure window
  • 6–9 AM80%(15 flights)
  • 9 AM–12 PM78%(23 flights)
  • 12–3 PM72%(32 flights)
  • 3–6 PM67%(140 flights)
On-time trend by month
69%
May

Oct 67% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202567%12
November 202577%13
December 202581%16
January 202676%21
February 202670%10
March 202662%42
April 202670%47
May 202669%49
Departures on time
66%
Diverted
0%
Flights flown
210
Months covered
8

Keep nerding

Based on 213 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.