Flight OddsWN3966 SMF → MDW
Southwest Airlines · Sacramento, CA to Chicago, IL · 50 flights observed, 2026-04-07 to 2026-06-03 · 1,790 mi
WN3966 covers more than one route in the data window — the stats below are for SMF → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-1 min
90th percentile
+25 min
Cancellation rate
0%
How often is WN3966 on time?
Across 50 flights on SMF → MDW from 2026-04-07 to 2026-06-03, WN3966 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -1 min, and the worst 10% of flights arrived +25 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 | 42 | 84% |
| 16-30 min | 4 | 8% |
| 31-60 min | 3 | 6% |
| 61-120 min | 1 | 2% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 21 | 86% | -6 min |
| 2026-05 | 26 | 81% | +7 min |
| 2026-06 | 3 | 100% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 88% |
| Tue | 9 | 89% |
| Wed | 9 | 100% |
| Thu | 8 | 75% |
| Fri | 8 | 75% |
| Sat | No data | — |
| 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…