Flight OddsWN4539 HOU → MDW
Southwest Airlines · Houston, TX to Chicago, IL · 24 flights observed, 2025-08-07 to 2025-09-29 · 937 mi
WN4539 covers more than one route in the data window — the stats below are for HOU → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
68%
Median delay
+9 min
90th percentile
+27 min
Cancellation rate
8%
How often is WN4539 on time?
Across 24 flights on HOU → MDW from 2025-08-07 to 2025-09-29, WN4539 arrived within 15 minutes of schedule 68% of the time. The median arrival delay was +9 min, and the worst 10% of flights arrived +27 min or later. 8% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 15 | 68% |
| 16-30 min | 5 | 23% |
| 31-60 min | 1 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 10 | 70% | +20 min |
| 2025-09 | 12 | 67% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 71% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 8 | 63% |
| Fri | 7 | 71% |
| Sat | No data | — |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…