Flight OddsDEN → BOS Southwest Airlines
Southwest Airlines · Denver, CO to Boston, MA · 910 flights, 2025-07-01 to 2026-06-30 · aggregated across 39 flight numbers
On-time arrival
61%
Median delay
+7 min
90th percentile
+85 min
Cancellation rate
1%
How on-time is Southwest Airlines from DEN to BOS?
Across every Southwest Airlines flight number on DEN → BOS (910 flights, 2025-07-01 to 2026-06-30), 61% arrived within 15 minutes of schedule. Median arrival delay +7 min; the worst 10% ran +85 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 546 | 61% |
| 16-30 min | 99 | 11% |
| 31-60 min | 111 | 12% |
| 61-120 min | 96 | 11% |
| 2+ hrs | 47 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 88 | 55% | +34 min |
| 2025-08 | 87 | 56% | +27 min |
| 2025-09 | 85 | 33% | +48 min |
| 2025-10 | 88 | 44% | +43 min |
| 2025-11 | 72 | 76% | +9 min |
| 2025-12 | 74 | 89% | -3 min |
| 2026-01 | 64 | 88% | 0 min |
| 2026-02 | 68 | 72% | +15 min |
| 2026-03 | 64 | 69% | +19 min |
| 2026-04 | 60 | 63% | +17 min |
| 2026-05 | 62 | 47% | +33 min |
| 2026-06 | 87 | 52% | +27 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 132 | 56% |
| Tue | 132 | 58% |
| Wed | 126 | 57% |
| Thu | 132 | 58% |
| Fri | 136 | 61% |
| Sat | 112 | 79% |
| Sun | 129 | 60% |
WN flight numbers on DEN → BOS
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…