AmaWaterways is one of the few river lines I recommend without hesitation, and their Early Booking Rewards are taking up to $2,500 off per stateroom on 2028 Europe sailings — real money on a line that rarely discounts, and the payoff for planning ahead. Picture the Danube through Vienna and Budapest, the Rhine past storybook castles, or the Douro's terraced vineyards in Portugal. Cabins are among the largest on the rivers, most with a twin balcony, and with included shore excursions, wine at dinner, and bikes onboard, your daily costs stay predictable. Reserve by September 30 to lock the savings while the best cabins and sailing dates are open.

I sailed the Danube with AmaWaterways and the twin-balcony cabins spoiled me — a full French balcony and a step-out one in the same room. Booking 2028 this far ahead sounds early, but river ships sell by cabin category and the best decks go first; a $2,500 cushion per stateroom to plan ahead is exactly what I tell clients to grab.