Flight OddsWN1666 SEA → MDW
Southwest Airlines · Seattle, WA to Chicago, IL · 57 flights observed, 2025-08-05 to 2025-10-01 · 1,733 mi
WN1666 covers more than one route in the data window — the stats below are for SEA → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-5 min
90th percentile
+26 min
Cancellation rate
0%
How often is WN1666 on time?
Across 57 flights on SEA → MDW from 2025-08-05 to 2025-10-01, WN1666 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +26 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 | 46 | 81% |
| 16-30 min | 5 | 9% |
| 31-60 min | 4 | 7% |
| 61-120 min | 2 | 4% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 26 | 77% | +5 min |
| 2025-09 | 30 | 83% | -1 min |
| 2025-10 | 1 | 100% | -16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 100% |
| Tue | 9 | 100% |
| Wed | 9 | 100% |
| Thu | 8 | 63% |
| Fri | 8 | 50% |
| Sat | 8 | 88% |
| Sun | 7 | 57% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…