Flight OddsSouthwest Airlines · Chicago, IL to Raleigh/Durham, NC · 19 flights observed, 2026-06-04 to 2026-06-30 · 632 mi
WN4221 covers more than one route in the data window — the stats below are for MDW → RDU, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN4221 on time?
Across 19 flights on MDW → RDU from 2026-06-04 to 2026-06-30, WN4221 arrived within 15 minutes of schedule 39% of the time. The median arrival delay was +21 min, and the worst 10% of flights arrived +137 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 7 | 39% |
| 16-30 min | 3 | 17% |
| 31-60 min | 4 | 22% |
| 61-120 min | 2 | 11% |
| 2+ hrs | 2 | 11% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-06 | 18 | 39% | +57 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 75% |
| Wed | 2 | 0% |
| Thu | 4 | 50% |
| Fri | 4 | 25% |
| 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…