Tickets for the first high-speed trains to leave the new Eurostar terminal at St Pancras railway station in London are now being sold.
Eurostar trains will continue running into Waterloo until 13 November
The switch from Waterloo to St Pancras in November will cut journey times to Europe by at least 20 minutes.
Business passengers will be able to reach the centres of Paris and Brussels before 0900 BST without travelling the night before.
Journeys from London to Paris will be cut from 2hr 35min to 2hr 15min.
Richard Brown, Eurostar's chief executive said: "For the first time business travellers can arrive seamlessly in Paris and Brussels before 9am, ready for a full day's work.
"We'll be running more trains, with half-hourly departures to Paris and hourly departures to Brussels at peak times."
The company has also set itself the target of cutting CO2 emissions by 25% per passenger by 2012.
Eurostar trains will continue running into Waterloo until 13 November 2007.
The switch to St Pancras has allowed the use of a high-speed rail link as well as improved transport connections.
Nearly half of all the Eurostar services to Europe will call at Ebbsfleet International, Eurostar's new station near Dartford, Kent.