Flight OddsBOS → MDW Southwest Airlines
Southwest Airlines · Boston, MA to Chicago, IL · 1,382 flights, 2025-07-01 to 2026-06-30 · aggregated across 65 flight numbers
On-time arrival
74%
Median delay
-3 min
90th percentile
+57 min
Cancellation rate
2%
How on-time is Southwest Airlines from BOS to MDW?
Across every Southwest Airlines flight number on BOS → MDW (1,382 flights, 2025-07-01 to 2026-06-30), 74% arrived within 15 minutes of schedule. Median arrival delay -3 min; the worst 10% ran +57 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 998 | 74% |
| 16-30 min | 118 | 9% |
| 31-60 min | 115 | 9% |
| 61-120 min | 78 | 6% |
| 2+ hrs | 42 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 170 | 71% | +16 min |
| 2025-08 | 133 | 80% | +9 min |
| 2025-09 | 126 | 58% | +24 min |
| 2025-10 | 138 | 71% | +12 min |
| 2025-11 | 83 | 83% | +5 min |
| 2025-12 | 90 | 73% | +15 min |
| 2026-01 | 66 | 88% | -4 min |
| 2026-02 | 58 | 81% | -2 min |
| 2026-03 | 109 | 69% | +12 min |
| 2026-04 | 118 | 81% | +1 min |
| 2026-05 | 122 | 74% | +4 min |
| 2026-06 | 138 | 72% | +18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 202 | 69% |
| Tue | 184 | 78% |
| Wed | 175 | 79% |
| Thu | 198 | 71% |
| Fri | 209 | 75% |
| Sat | 179 | 82% |
| Sun | 204 | 66% |
WN flight numbers on BOS → MDW
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…