Flight OddsWN378 DEN → BOS
Southwest Airlines · Denver, CO to Boston, MA · 57 flights observed, 2026-04-07 to 2026-06-03 · 1,754 mi
WN378 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
32%
Median delay
+38 min
90th percentile
+107 min
Cancellation rate
0%
How often is WN378 on time?
Across 57 flights on DEN → BOS from 2026-04-07 to 2026-06-03, WN378 arrived within 15 minutes of schedule 32% of the time. The median arrival delay was +38 min, and the worst 10% of flights arrived +107 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 | 18 | 32% |
| 16-30 min | 8 | 14% |
| 31-60 min | 17 | 30% |
| 61-120 min | 9 | 16% |
| 2+ hrs | 5 | 9% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 24 | 46% | +26 min |
| 2026-05 | 30 | 23% | +62 min |
| 2026-06 | 3 | 0% | +38 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 25% |
| Tue | 9 | 22% |
| Wed | 9 | 33% |
| Thu | 8 | 13% |
| Fri | 8 | 13% |
| Sat | 8 | 88% |
| Sun | 7 | 29% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…