2021-2023 RIVER CRUISE AND AIR SAVINGS: Offer valid on bookings made from Jan 1 to Jan 31, 2021. Special cruise fares plus FREE international air valid on 2021-2023 departures of Grand European Tour; European Sojourn; Waterways of the Tsars . Airfares vary on other gateways & departures. Air does not have to be purchased to get cruise/tour offer. All prices are in US dollars and for US residents only. Additional restrictions may apply. Book by Jan 31, 2021. 2021: Pay in full by Feb 28, 2021. 2022: Pay in full by Jun 30, 2021. 2023: Pay in full by Dec 31, 2021. Offer expires Jan 31, 2021.