The train company believe that bookings have been boosted by visitors looking to stay in central London hotels over the special Jubilee weekend at the start of June.
Offering trains between the capital and a number of French cities including Paris, Eurostar also expects bookings to increase as more people look for cheap hotel deals ahead of the summer 2012 Olympic Games.
"London is gearing up for one its busiest-ever summers as travellers flock to London to enjoy a range of attractions," explained Eurostar's chief executive officer Nicolas Petrovic.
He added: "The combination of the Queen’s Jubilee celebration and the London 2012 games and festival will ensure that the capital has much to offer."
It has also been revealed that over 1.2 million applications for tickets for the Queen's Diamond Jubilee were received – despite there only being 10,000 available, reports BBC News.
Set to be held on Monday June 4th at the Queen Victoria Memorial in front of Buckingham Palace, the concert has been organised by Take That's Gary Barlow and will feature stars such as Sir Paul McCartney, Shirley Bassey, Stevie Wonder, Annie Lennox, Sir Cliff Richard and Jessie J.
At the launch of the ticket ballot, the Take That singer said: "The Diamond Jubilee concert will celebrate the 60 years of the Queen’s reign with an amazing line-up of world class artists coming together to play at one of the biggest and most exciting live music shows in recent years.
"With Buckingham Palace as a backdrop, it’s going to be a fantastic event which transcends multiple decades of music."