Flight OddsWN557 BOS → MDW
Southwest Airlines · Boston, MA to Chicago, IL · 8 flights observed, 2025-10-07 to 2025-10-29 · 861 mi
WN557 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
75%
Median delay
+5 min
90th percentile
+72 min
Cancellation rate
0%
How often is WN557 on time?
Across 8 flights on BOS → MDW from 2025-10-07 to 2025-10-29, WN557 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was +5 min, and the worst 10% of flights arrived +72 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 | 6 | 75% |
| 16-30 min | 1 | 13% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 8 | 75% | +28 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 4 | 50% |
| Wed | 4 | 100% |
| 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…