The itinerary was introduced in 2020 but had to be cancelled owing to Covid travel restrictions.
It explores the country’s Atlantic coastline, taking in Nova Scotia, New Brunswick and Prince Edward Island.
Riviera will offer six departures, from May to September, with guests staying for at least two days in each province.
There will be up to 49 places per tour.
Highlights include a journey, by road, along Nova Scotia’s Cabot Trail; a visit to Cape Breton Highlands National Park, famed for its wildlife with opportunities to see moose, black bears and beavers; and excursions to the historic city of Halifax, capital of Nova Scotia.
There, guests will visit the Citadel National Historic Site and Fundy National Park, home to the world’s highest tides.
Other experiences include visits to the Anne of Green Gables and Alexander Graham Bell museums, and a trip to Peggy’s Point lighthouse.
The tour leads in from £2,399pp including direct return flights from Heathrow, the services of a tour manager, hotel transfers and accommodation.
Katja Hildebrandt, Riviera’s head of worldwide product, said: “We’re pleased to confirm our Maritime Canada tour is available again, meaning guests have the opportunity to explore these three picture-postcard provinces, with their own distinctive character and attractions.
"From the beautiful scenery to the coastal cliffs, lush highlands and forested valleys, to quaint fishing towns and the world’s highest tides, this will be an unforgettable journey to one of the most memorable parts of the world.”