Flight OddsIAD → DEN Southwest Airlines
Southwest Airlines · Washington, DC to Denver, CO · 762 flights, 2025-07-01 to 2026-06-03 · aggregated across 23 flight numbers
On-time arrival
77%
Median delay
-1 min
90th percentile
+38 min
Cancellation rate
1%
How on-time is Southwest Airlines from IAD to DEN?
Across every Southwest Airlines flight number on IAD → DEN (762 flights, 2025-07-01 to 2026-06-03), 77% arrived within 15 minutes of schedule. Median arrival delay -1 min; the worst 10% ran +38 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 581 | 77% |
| 16-30 min | 82 | 11% |
| 31-60 min | 44 | 6% |
| 61-120 min | 29 | 4% |
| 2+ hrs | 16 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 81 | 65% | +18 min |
| 2025-08 | 82 | 72% | +15 min |
| 2025-09 | 82 | 83% | +4 min |
| 2025-10 | 68 | 85% | -3 min |
| 2025-11 | 69 | 88% | +1 min |
| 2025-12 | 72 | 68% | +20 min |
| 2026-01 | 58 | 86% | -1 min |
| 2026-02 | 52 | 83% | +1 min |
| 2026-03 | 61 | 77% | +14 min |
| 2026-04 | 60 | 70% | +13 min |
| 2026-05 | 61 | 75% | +4 min |
| 2026-06 | 6 | 83% | +5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 118 | 79% |
| Tue | 114 | 79% |
| Wed | 111 | 76% |
| Thu | 116 | 73% |
| Fri | 118 | 78% |
| Sat | 77 | 82% |
| Sun | 98 | 76% |
WN flight numbers on IAD → DEN
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…