Southwest Airlines · San Francisco, CA to Las Vegas, NV · 31 flights observed, 2026-04-09 to 2026-06-01 · 414 mi
WN4091 covers more than one route in the data window — the stats below are for SFO → LAS, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4091 on time?
Across 31 flights on SFO → LAS from 2026-04-09 to 2026-06-01, WN4091 arrived within 15 minutes of schedule 3% of the time. The median arrival delay was +61 min, and the worst 10% of flights arrived +100 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 | 1 | 3% |
| 16-30 min | 2 | 6% |
| 31-60 min | 12 | 39% |
| 61-120 min | 14 | 45% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 13 | 8% | +55 min |
| 2026-05 | 17 | 0% | +80 min |
| 2026-06 | 1 | 0% | +111 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 13% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 8 | 0% |
| Fri | 8 | 0% |
| Sat | No data | — |
| Sun | 7 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…