Offer valid on bookings made from Oct 1 to Oct 31, 2021. FREE international airfare plus special cruise savings valid on Mar-May 2022 departures of Danube Waltz; Rhine Getaway; Romantic Danube; Lyon & Provence; France’s Finest; Elegant Elbe; Apr-Jun 2022 departures of Grand European Tour; Mar 2022 departures of Tulips & Windmills; May 2022 departures of Waterways of the Tsars; subject to availability; other categories may be higher, please call for details. Prices are in US dollars and for US residents only. Viking all-inclusive air with transfers available. Air does not have to be purchased to get cruise/tour offer. All fares reflect cruise taxes, port taxes and fees. Additional restrictions may apply. Airfares vary on other gateways and departures. Air offers not valid on Alaska, Hawaii, San Juan and Mexico City; call for details. Book by Oct 31, 2021; pay in full by Nov 30, 2021. Offer expires Oct 31, 2021.