Agents are being offered £50 Amazon vouchers for each Swan Hellenic booking made as part of a spring sale.
The cultural expedition line is discounting cruises by 20% in a promotion running until July 31.
The company is also offering $300 on board spend per passenger.
The promotion also includes a 15% deposit offer with balances due 60 days before departure.
It comes ahead of the relaunched company returning to service with the first of three new ships.
The line is bringing a pair of 152-passeger vessels into service in November and next April.
A larger 192-passenger ice-class vessel is due to be delivered by the end of 2022.
Chief executive Andrea Zito said: “We want to create a truly special celebration feel about our return to the waves.
“So, we’ve worked hard to cover every angle, from savings to gifts, convenience, clarity and peace of mind.
“It’s our way of saying welcome as we start an extraordinary journey together with Swan Hellenic cultural expedition cruise enthusiasts new and old, taking them to see what others don’t.
“And last but not least we want you to know we’re committed to personally supporting our trade partners’ efforts. So we’ll now be rewarding each member of staff with a £50 Amazon voucher for every booking they make.”