Flight Reliability
WN 4923 · Southwest Airlines
Buffalo → Baltimore (BUF–BWI)85% of its flights flew this route. The rest (DAL–ABQ, IND–MCO) are included in these numbers.
84
Pretty Reliable
WanderNerd Reliability Score
- 94%
- Arrive within 15 minutes
- 8 min early
- Average arrival delay
- 4.4%
- Cancelled
- 15 min early
- Median arrival delay
Based on 68 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
WN 4923 arrived on time 100% of the time on Tuesdays and just 85% on Wednesdays. That gap is worth planning around.
Better than the BUF–BWI route average.
WN 4923 arrived on time 94% of the time, versus 87% across the BUF–BWI route.
Well ahead of the Southwest Airlines network.
WN 4923 arrived on time 94% of the time, versus 78% across the Southwest Airlines network.
The breakdown
- Mon—(6 flights)
- Tue100%(13 flights)
- Wed85%(13 flights)
- Thu—(9 flights)
- Fri—(8 flights)
- Sat—(8 flights)
- Sun—(8 flights)
- 3–6 AM95%(55 flights)
- 12–3 PM—(9 flights)
- 3–6 PM—(1 flights)
100%
Mar
Jan 96% → Mar 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 96% | 24 |
| February 2026 | 93% | 27 |
| March 2026 | 100% | 11 |
- Departures on time
- 95%
- Diverted
- 0%
- Flights flown
- 65
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 68 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.