Flight OddsWN171 MDW → BOS
Southwest Airlines · Chicago, IL to Boston, MA · 29 flights observed, 2025-07-01 to 2025-08-04 · 861 mi
WN171 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
90%
Median delay
-2 min
90th percentile
+15 min
Cancellation rate
0%
How often is WN171 on time?
Across 29 flights on MDW → BOS from 2025-07-01 to 2025-08-04, WN171 arrived within 15 minutes of schedule 90% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +15 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 | 26 | 90% |
| 16-30 min | 2 | 7% |
| 31-60 min | 1 | 3% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 92% | -2 min |
| 2025-08 | 3 | 67% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 100% |
| Wed | 5 | 100% |
| Thu | 5 | 80% |
| Fri | 4 | 100% |
| Sat | No data | — |
| Sun | 5 | 60% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…