Flight OddsSouthwest Airlines · Raleigh/Durham, NC to Chicago, IL · 40 flights observed, 2026-04-09 to 2026-06-01 · 632 mi
WN3998 covers more than one route in the data window — the stats below are for RDU → MDW, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN3998 on time?
Across 40 flights on RDU → MDW from 2026-04-09 to 2026-06-01, WN3998 arrived within 15 minutes of schedule 59% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +62 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 23 | 59% |
| 16-30 min | 7 | 18% |
| 31-60 min | 5 | 13% |
| 61-120 min | 1 | 3% |
| 2+ hrs | 3 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 15 | 67% | +4 min |
| 2026-05 | 23 | 52% | +29 min |
| 2026-06 | 1 | 100% | -6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 38% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 8 | 50% |
| Fri | 7 | 86% |
| Sat | 8 | 75% |
| Sun | 8 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…