Flight Reliability
WN 4998 · Southwest Airlines
St. Louis → Boston (STL–BOS)98% of its flights flew this route. The rest (RDU–PHX) are included in these numbers.
60
A Little Dicey
WanderNerd Reliability Score
- 75%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 5.6%
- Cancelled
- 0 min
- Median arrival delay
Based on 54 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
WN 4998 departing between 6–9 PM arrived on time 83% of the time, versus 68% between 3–6 PM.
A bit behind the Southwest Airlines network.
WN 4998 arrived on time 75% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon—(7 flights)
- Tue—(9 flights)
- Wed—(9 flights)
- Thu—(8 flights)
- Fri—(8 flights)
- Sat—(3 flights)
- Sun—(7 flights)
- 3–6 PM68%(28 flights)
- 6–9 PM83%(23 flights)
- Departures on time
- 59%
- Diverted
- 0%
- Flights flown
- 51
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 54 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.