LATEST 12-MONTH WINDOW
IAD to SEA averages 86% full
Dulles and Seattle: 86% average load factor, 535k passengers, and 624k seats across both directions in the latest 12-month BTS window.
Load factor
86%
Passengers
535k
Seats
624k
Monthly trend
| Month | Load | Passengers |
|---|---|---|
| Jul 2025 | 91% | 75k |
| Aug 2025 | 92% | 68k |
| Sep 2025 | 80% | 48k |
| Oct 2025 | 79% | 40k |
| Nov 2025 | 78% | 30k |
| Dec 2025 | 86% | 35k |
| Jan 2026 | 79% | 25k |
| Feb 2026 | 79% | 24k |
| Mar 2026 | 90% | 34k |
| Apr 2026 | 87% | 37k |
| May 2026 | 86% | 58k |
| Jun 2026 | 91% | 60k |