Flight OddsWN1431 BOS → MDW
Southwest Airlines · Boston, MA to Chicago, IL · 35 flights observed, 2025-07-01 to 2025-08-04 · 861 mi
WN1431 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
91%
Median delay
-10 min
90th percentile
+6 min
Cancellation rate
0%
How often is WN1431 on time?
Across 35 flights on BOS → MDW from 2025-07-01 to 2025-08-04, WN1431 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +6 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 | 32 | 91% |
| 16-30 min | 1 | 3% |
| 31-60 min | 1 | 3% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 90% | -1 min |
| 2025-08 | 4 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 80% |
| Wed | 5 | 100% |
| Thu | 5 | 100% |
| Fri | 5 | 100% |
| Sat | 5 | 80% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…