Flight OddsBOS → DEN Southwest Airlines
Southwest Airlines · Boston, MA to Denver, CO · 910 flights, 2025-07-01 to 2026-06-30 · aggregated across 38 flight numbers
On-time arrival
66%
Median delay
+4 min
90th percentile
+60 min
Cancellation rate
1%
How on-time is Southwest Airlines from BOS to DEN?
Across every Southwest Airlines flight number on BOS → DEN (910 flights, 2025-07-01 to 2026-06-30), 66% arrived within 15 minutes of schedule. Median arrival delay +4 min; the worst 10% ran +60 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 590 | 66% |
| 16-30 min | 126 | 14% |
| 31-60 min | 95 | 11% |
| 61-120 min | 59 | 7% |
| 2+ hrs | 28 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 87 | 60% | +24 min |
| 2025-08 | 86 | 70% | +16 min |
| 2025-09 | 85 | 56% | +29 min |
| 2025-10 | 87 | 68% | +12 min |
| 2025-11 | 73 | 78% | +4 min |
| 2025-12 | 73 | 63% | +14 min |
| 2026-01 | 66 | 70% | +8 min |
| 2026-02 | 68 | 75% | +4 min |
| 2026-03 | 64 | 59% | +18 min |
| 2026-04 | 60 | 73% | +11 min |
| 2026-05 | 62 | 66% | +6 min |
| 2026-06 | 87 | 55% | +21 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 133 | 65% |
| Tue | 131 | 69% |
| Wed | 125 | 66% |
| Thu | 130 | 62% |
| Fri | 136 | 63% |
| Sat | 112 | 71% |
| Sun | 131 | 65% |
WN flight numbers on BOS → DEN
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…