Flight Reliability
WN 5123 · Southwest Airlines
Atlanta → Houston (ATL–HOU)80% of its flights flew this route. The rest (SJC–DEN, LAS–SFO) are included in these numbers.
61
A Little Dicey
WanderNerd Reliability Score
- 57%
- Arrive within 15 minutes
- 18 min
- Average arrival delay
- 0%
- Cancelled
- 10 min
- Median arrival delay
Based on 30 historical flights. Data through May 2026.
What the data says
Well behind the ATL–HOU route.
WN 5123 arrived on time 57% of the time, versus 80% across the ATL–HOU route.
Well behind the Southwest Airlines network.
WN 5123 arrived on time 57% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon50%(10 flights)
- Tue—(1 flights)
- Wed—(0 flights)
- Thu—(8 flights)
- Fri—(9 flights)
- Sat—(1 flights)
- Sun—(1 flights)
- 6–9 AM—(1 flights)
- 3–6 PM—(3 flights)
- 6–9 PM60%(25 flights)
- 9 PM–12 AM—(1 flights)
- Departures on time
- 50%
- Diverted
- 0%
- Flights flown
- 30
- Months covered
- 6
Same route, other flights
Keep nerding
Based on 30 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.