Flight OddsWN4520 HOU → MDW
Southwest Airlines · Houston, TX to Chicago, IL · 18 flights observed, 2026-04-07 to 2026-06-03 · 937 mi
WN4520 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
89%
Median delay
-5 min
90th percentile
+14 min
Cancellation rate
0%
How often is WN4520 on time?
Across 18 flights on HOU → MDW from 2026-04-07 to 2026-06-03, WN4520 arrived within 15 minutes of schedule 89% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +14 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 | 16 | 89% |
| 16-30 min | 1 | 6% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 8 | 75% | +7 min |
| 2026-05 | 8 | 100% | -2 min |
| 2026-06 | 2 | 100% | -8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 9 | 89% |
| Wed | 9 | 89% |
| Thu | No data | — |
| Fri | No data | — |
| 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…