Flight OddsWN3911 BOS → MDW
Southwest Airlines · Boston, MA to Chicago, IL · 28 flights observed, 2025-07-06 to 2026-06-30 · 861 mi
WN3911 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
65%
Median delay
+10 min
90th percentile
+101 min
Cancellation rate
4%
How often is WN3911 on time?
Across 28 flights on BOS → MDW from 2025-07-06 to 2026-06-30, WN3911 arrived within 15 minutes of schedule 65% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +101 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 | 17 | 65% |
| 16-30 min | 1 | 4% |
| 31-60 min | 4 | 15% |
| 61-120 min | 2 | 8% |
| 2+ hrs | 2 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 4 | 100% | +2 min |
| 2025-08 | 1 | 100% | -2 min |
| 2026-06 | 21 | 57% | +31 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 50% |
| Wed | 2 | 50% |
| Thu | 3 | 33% |
| Fri | 4 | 75% |
| Sat | 4 | 100% |
| Sun | 5 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…