Flight OddsWN3621 MDW → BOS
Southwest Airlines · Chicago, IL to Boston, MA · 7 flights observed, 2025-08-10 to 2025-09-28 · 861 mi
WN3621 covers more than one route in the data window — the stats below are for MDW → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
100%
Median delay
-17 min
90th percentile
-7 min
Cancellation rate
0%
How often is WN3621 on time?
Across 7 flights on MDW → BOS from 2025-08-10 to 2025-09-28, WN3621 arrived within 15 minutes of schedule 100% of the time. The median arrival delay was -17 min, and the worst 10% of flights arrived -7 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 | 7 | 100% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 3 | 100% | -10 min |
| 2025-09 | 4 | 100% | -19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | No data | — |
| Sun | 7 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…