Flight OddsBUF → MDW Southwest Airlines
Southwest Airlines · Buffalo, NY to Chicago, IL · 829 flights, 2025-07-01 to 2026-06-30 · aggregated across 49 flight numbers
On-time arrival
79%
Median delay
-2 min
90th percentile
+41 min
Cancellation rate
1%
How on-time is Southwest Airlines from BUF to MDW?
Across every Southwest Airlines flight number on BUF → MDW (829 flights, 2025-07-01 to 2026-06-30), 79% arrived within 15 minutes of schedule. Median arrival delay -2 min; the worst 10% ran +41 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 645 | 79% |
| 16-30 min | 59 | 7% |
| 31-60 min | 62 | 8% |
| 61-120 min | 34 | 4% |
| 2+ hrs | 17 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 95 | 77% | +9 min |
| 2025-08 | 84 | 80% | +14 min |
| 2025-09 | 82 | 90% | -1 min |
| 2025-10 | 59 | 85% | +3 min |
| 2025-11 | 53 | 85% | -1 min |
| 2025-12 | 59 | 71% | +9 min |
| 2026-01 | 30 | 90% | -4 min |
| 2026-02 | 30 | 90% | -3 min |
| 2026-03 | 74 | 61% | +18 min |
| 2026-04 | 81 | 80% | +5 min |
| 2026-05 | 82 | 77% | +11 min |
| 2026-06 | 88 | 76% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 128 | 77% |
| Tue | 127 | 83% |
| Wed | 124 | 81% |
| Thu | 128 | 79% |
| Fri | 128 | 79% |
| Sat | 71 | 80% |
| Sun | 111 | 73% |
WN flight numbers on BUF → MDW
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…