September 2026 Sailings from Port of Seattle

September 2026 Departures

Most cruise lines assign an arrival window during online check-in, and arriving inside that window is the best way to avoid the longest terminal lines. General boarding usually runs from late morning into the early afternoon, but the exact timing varies by ship, port, and sail date. Follow the check-in instructions your cruise line sends you — they always take priority over general guidance.

Plan your Port of Seattle cruise day