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Flight Reliability

WN 1550 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1550 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
7 min
Average arrival delay
1.0%
Cancelled
3 min early
Median arrival delay

Based on 415 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon71%(55 flights)
  • Tue75%(65 flights)
  • Wed85%(65 flights)
  • Thu76%(54 flights)
  • Fri73%(55 flights)
  • Sat83%(59 flights)
  • Sun59%(56 flights)
On-time by departure window
  • 6–9 AM95%(55 flights)
  • 9 AM–12 PM89%(142 flights)
  • 12–3 PM79%(42 flights)
  • 3–6 PM56%(77 flights)
  • 6–9 PM56%(75 flights)
  • 9 PM–12 AM56%(18 flights)
On-time trend by month
98%
May

Jun 62% → May 98% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%29
July 202570%30
August 202547%17
September 202553%17
October 202575%36
November 202565%31
December 202550%40
January 202677%53
February 202695%41
March 202674%31
April 202693%40
May 202698%44
Departures on time
73%
Diverted
0.5%
Flights flown
409
Months covered
12

Keep nerding

Based on 415 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.