Cruises - AMS from river cruise dock

Our river cruise ends in Amsterdam. After spendng the night on ship, we have a flight out of AMS. About how long will it take to get their by Avalon (cruise line) provided "buses"?

Fairly early flight, wondered how much time we have to plan for last minute, breakfast, etc.

About half an hour or so depending on traffic. Or you can get off the boat, walk to the train station (about a 10-15 minute walk which is mostly up and over a bridge and back down again) and take the train to the airport which is about a 20 minute ride.