Flight OddsWN3640 MDW → SEA
Southwest Airlines · Chicago, IL to Seattle, WA · 32 flights observed, 2026-03-05 to 2026-04-06 · 1,733 mi
WN3640 covers more than one route in the data window — the stats below are for MDW → SEA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
25%
Median delay
+32 min
90th percentile
+135 min
Cancellation rate
0%
How often is WN3640 on time?
Across 32 flights on MDW → SEA from 2026-03-05 to 2026-04-06, WN3640 arrived within 15 minutes of schedule 25% of the time. The median arrival delay was +32 min, and the worst 10% of flights arrived +135 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 | 8 | 25% |
| 16-30 min | 7 | 22% |
| 31-60 min | 9 | 28% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 6 | 19% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 26 | 19% | +47 min |
| 2026-04 | 6 | 50% | +68 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 20% |
| Tue | 4 | 0% |
| Wed | 4 | 50% |
| Thu | 5 | 20% |
| Fri | 5 | 0% |
| Sat | 4 | 50% |
| Sun | 5 | 40% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…