Flight OddsWN4436 BWI → BOS
Southwest Airlines · Baltimore, MD to Boston, MA · 34 flights observed, 2026-04-07 to 2026-06-03 · 369 mi
WN4436 covers more than one route in the data window — the stats below are for BWI → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
56%
Median delay
+4 min
90th percentile
+91 min
Cancellation rate
0%
How often is WN4436 on time?
Across 34 flights on BWI → BOS from 2026-04-07 to 2026-06-03, WN4436 arrived within 15 minutes of schedule 56% of the time. The median arrival delay was +4 min, and the worst 10% of flights arrived +91 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 | 19 | 56% |
| 16-30 min | 3 | 9% |
| 31-60 min | 7 | 21% |
| 61-120 min | 2 | 6% |
| 2+ hrs | 3 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 14 | 71% | +5 min |
| 2026-05 | 18 | 44% | +42 min |
| 2026-06 | 2 | 50% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 9 | 67% |
| Wed | 9 | 33% |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 8 | 88% |
| Sun | 8 | 38% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…