Flight OddsWN4381 DEN → BOS
Southwest Airlines · Denver, CO to Boston, MA · 11 flights observed, 2026-02-12 to 2026-03-01 · 1,754 mi
WN4381 covers more than one route in the data window — the stats below are for DEN → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
50%
Median delay
+10 min
90th percentile
+51 min
Cancellation rate
9%
How often is WN4381 on time?
Across 11 flights on DEN → BOS from 2026-02-12 to 2026-03-01, WN4381 arrived within 15 minutes of schedule 50% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +51 min or later. 9% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 5 | 50% |
| 16-30 min | 2 | 20% |
| 31-60 min | 2 | 20% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 10% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 9 | 56% | +9 min |
| 2026-03 | 1 | 0% | +121 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 1 | 0% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 2 | 50% |
| Fri | 3 | 33% |
| Sat | 3 | 100% |
| Sun | 1 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…