Flight OddsWN3665 BOS → MDW
Southwest Airlines · Boston, MA to Chicago, IL · 58 flights observed, 2026-04-07 to 2026-06-03 · 861 mi
WN3665 covers more than one route in the data window — the stats below are for BOS → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
60%
Median delay
+7 min
90th percentile
+55 min
Cancellation rate
0%
How often is WN3665 on time?
Across 58 flights on BOS → MDW from 2026-04-07 to 2026-06-03, WN3665 arrived within 15 minutes of schedule 60% of the time. The median arrival delay was +7 min, and the worst 10% of flights arrived +55 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 | 35 | 60% |
| 16-30 min | 11 | 19% |
| 31-60 min | 9 | 16% |
| 61-120 min | 2 | 3% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 67% | +17 min |
| 2026-05 | 31 | 52% | +14 min |
| 2026-06 | 3 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 38% |
| Tue | 9 | 78% |
| Wed | 9 | 22% |
| Thu | 8 | 38% |
| Fri | 8 | 63% |
| Sat | 8 | 100% |
| Sun | 8 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…