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Flight Reliability

WN 4048 · Southwest Airlines

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and WN 4048 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

90%
Arrive within 15 minutes
2 min early
Average arrival delay
1.0%
Cancelled
8 min early
Median arrival delay

Based on 197 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon97%(29 flights)
  • Tue91%(21 flights)
  • Wed83%(18 flights)
  • Thu79%(29 flights)
  • Fri88%(34 flights)
  • Sat100%(23 flights)
  • Sun93%(40 flights)
On-time by departure window
  • 6–9 AM90%(39 flights)
  • 9 AM–12 PM100%(23 flights)
  • 12–3 PM87%(63 flights)
  • 3–6 PM89%(64 flights)
  • 6–9 PM—(5 flights)
On-time trend by month
100%
May

Oct 100% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 2025100%30
November 202575%16
December 2025100%13
January 202694%32
February 202682%45
March 202677%17
April 202694%18
May 2026100%23
Departures on time
84%
Diverted
0.5%
Flights flown
194
Months covered
8

Keep nerding

Based on 197 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.