2021-2023 RIVER CRUISE AND AIR SAVINGS: Offer valid on bookings made from Apr 1 to Apr 30, 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 Apr 30, 2021. 2021: Pay in full by May 31, 2021. 2022: Pay in full by Jun 30, 2021. 2023: Pay in full by Dec 31, 2021. Offer expires Apr 30, 2021.