Flight OddsSouthwest Airlines · San Francisco, CA to Baltimore, MD · 58 flights observed, 2025-08-05 to 2025-10-01 · 2,457 mi
WN4271 covers more than one route in the data window — the stats below are for SFO → BWI, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4271 on time?
Across 58 flights on SFO → BWI from 2025-08-05 to 2025-10-01, WN4271 arrived within 15 minutes of schedule 67% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +38 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 39 | 67% |
| 16-30 min | 11 | 19% |
| 31-60 min | 4 | 7% |
| 61-120 min | 3 | 5% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 27 | 74% | +11 min |
| 2025-09 | 30 | 60% | +12 min |
| 2025-10 | 1 | 100% | -13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 50% |
| Tue | 9 | 78% |
| Wed | 9 | 67% |
| Thu | 8 | 50% |
| Fri | 8 | 63% |
| Sat | 8 | 88% |
| Sun | 8 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…