Flight OddsWN1440 BOS → MDW
Southwest Airlines · Boston, MA to Chicago, IL · 24 flights observed, 2025-08-07 to 2025-09-29 · 861 mi
WN1440 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
35%
Median delay
+29 min
90th percentile
+134 min
Cancellation rate
4%
How often is WN1440 on time?
Across 24 flights on BOS → MDW from 2025-08-07 to 2025-09-29, WN1440 arrived within 15 minutes of schedule 35% of the time. The median arrival delay was +29 min, and the worst 10% of flights arrived +134 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 8 | 35% |
| 16-30 min | 4 | 17% |
| 31-60 min | 1 | 4% |
| 61-120 min | 7 | 30% |
| 2+ hrs | 3 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 11 | 55% | +36 min |
| 2025-09 | 12 | 17% | +65 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 25% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 7 | 43% |
| Fri | 8 | 38% |
| 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…