Flight OddsMDW → SEA Southwest Airlines
Southwest Airlines · Chicago, IL to Seattle, WA · 678 flights, 2025-07-01 to 2026-06-30 · aggregated across 40 flight numbers
On-time arrival
66%
Median delay
+4 min
90th percentile
+53 min
Cancellation rate
0%
How on-time is Southwest Airlines from MDW to SEA?
Across every Southwest Airlines flight number on MDW → SEA (678 flights, 2025-07-01 to 2026-06-30), 66% arrived within 15 minutes of schedule. Median arrival delay +4 min; the worst 10% ran +53 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 442 | 66% |
| 16-30 min | 108 | 16% |
| 31-60 min | 66 | 10% |
| 61-120 min | 40 | 6% |
| 2+ hrs | 16 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 86 | 59% | +16 min |
| 2025-08 | 87 | 68% | +10 min |
| 2025-09 | 86 | 80% | +2 min |
| 2025-10 | 33 | 82% | +1 min |
| 2025-11 | 29 | 66% | +19 min |
| 2025-12 | 30 | 53% | +18 min |
| 2026-01 | 31 | 87% | +1 min |
| 2026-02 | 28 | 79% | +0 min |
| 2026-03 | 57 | 30% | +42 min |
| 2026-04 | 60 | 73% | +14 min |
| 2026-05 | 62 | 76% | +7 min |
| 2026-06 | 83 | 53% | +29 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 99 | 64% |
| Tue | 102 | 70% |
| Wed | 98 | 72% |
| Thu | 98 | 60% |
| Fri | 97 | 57% |
| Sat | 88 | 74% |
| Sun | 90 | 64% |
WN flight numbers on MDW → SEA
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…