World's most expensive cruise: $1.5 million for 28 countries

The world's most expensive luxury cruise package is up for grabs and comes with a price tag of $A1.5 million per couple.

The 124-day holiday onboard Silversea Cruises' vessel Silver Whisper departs from Los Angeles in January 2013 and includes visits to 28 countries, including French Polynesia, New Zealand and Australia.

The package, offered by UK cruise retailer Six Star Cruises, carries a price tag of STG1 million ($A1.49 million) - or nearly $A12,000 per day per couple.

The trip starts with the holidaymakers being whisked away from their home or hotel in London by helicopter and flown to a London airport. At the airport the couple will dine on Beluga Caviar, priced at a STG4,000 ($A5,967) per kilogram.

The pair will then fly to the United States by private charter onboard a Boeing business jet that features mahogany panelling and gold-plated fixtures. During the flight a Michelin star chef will create a 10 course tasting menu for the couple.

Once at sea the pair will stay in Silver Whisper's Royal Suite, which has two bedrooms, two marbled bathrooms, dining area and two balconies.

The cruise package also includes a four night pre-cruise stay at the iconic Beverley Wilshire Hotel in Beverley Hills, Los Angeles, and a four night post-cruise stay in a six-bedroom villa in Miami, Florida.

Six Star Cruises company director Mal Barritt said that despite economic uncertainty in Europe, he believes this holiday package will sell well.

"We have listened to what some of our most discerning customers say they look for in a holiday and have created the most desirable cruise holiday in the world," he said in a statement.

The four-month cruise departs the UK on January 1, 2013 and those looking to get on board can opt for a less expensive option - Ocean View Vista Suite for the entire 115-day cruise are available from US$48,114 ($A45,018) per person, double occupancy.