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Flight Reliability

WN 2603 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 2603 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

79%
Arrive within 15 minutes
8 min
Average arrival delay
1.0%
Cancelled
1 min early
Median arrival delay

Based on 484 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon79%(67 flights)
  • Tue90%(77 flights)
  • Wed80%(75 flights)
  • Thu68%(71 flights)
  • Fri74%(65 flights)
  • Sat88%(58 flights)
  • Sun74%(66 flights)
On-time by departure window
  • 3–6 AM—(3 flights)
  • 6–9 AM98%(64 flights)
  • 9 AM–12 PM82%(156 flights)
  • 12–3 PM74%(112 flights)
  • 3–6 PM77%(108 flights)
  • 6–9 PM58%(31 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
87%
May

Jun 79% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%57
July 202579%67
August 202579%34
September 202566%29
October 202579%71
November 202590%30
December 202577%31
January 202694%33
February 202684%32
March 202672%32
April 202659%32
May 202687%31
Departures on time
71%
Diverted
0%
Flights flown
479
Months covered
12

Keep nerding

Based on 484 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.