Offer valid for new bookings made between July 5th and September 27th on select Antarctic voyages on the Ultramarine and World Explorer. Solo travelers will be able to book double-occupancy standard cabins for the discounted price of a single berth. Only applicable to standard cabin types; cabins limited. Bookings made before or after the promotion period will not qualify for the savings. Must quote promo code(s) and provide passengers’ full names at time of booking. Not applicable to group bookings. Quark Expeditions® has the right to limit, change or discontinue promotion at any time without notice. No cash value. Brochure Terms & Conditions apply.