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Flight Reliability

WN 1553 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 1553 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

76%
Arrive within 15 minutes
11 min
Average arrival delay
0%
Cancelled
4 min early
Median arrival delay

Based on 338 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon77%(53 flights)
  • Tue83%(52 flights)
  • Wed79%(52 flights)
  • Thu69%(52 flights)
  • Fri73%(52 flights)
  • Sat85%(34 flights)
  • Sun65%(43 flights)
On-time by departure window
  • 6–9 AM97%(71 flights)
  • 9 AM–12 PM81%(41 flights)
  • 12–3 PM78%(37 flights)
  • 3–6 PM59%(88 flights)
  • 6–9 PM72%(101 flights)
On-time trend by month
50%
Mar

Jun 92% → Mar 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%26
July 2025100%28
August 202559%44
September 202577%47
October 202574%34
November 202586%28
December 202584%31
January 202682%27
February 202674%27
March 202650%38
Departures on time
73%
Diverted
0%
Flights flown
338
Months covered
12

Keep nerding

Based on 338 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.