2021–2023 RIVER CRUISE AND AIR SAVINGS: Offer valid on bookings made from Sep 1–30, 2021. Special cruise savings plus FREE international airfare valid on 2021–2023 departures of Grand European Tour; European Sojourn; Waterways of the Tsars. Airfares vary on other gateways & departures. Airfare 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 Sep 30, 2021. 2021: Pay in full by Sep 30, 2021 or time of booking if within 90 days of departure. 2022: Pay in full by Nov 30, 2021. 2023: Pay in full by Mar 31, 2022. Offers expires Sep 30, 2021.