Choose to book your travel to Southampton through the South West Trains Web site if you wish to leave from London's Waterloo Station.
Book your train travel online at the First Great Western Web site if leaving from London's Victoria Station is more convenient for you. You can also book train travel from London to Southhampton by calling Rail Europe at (888) 382-RAIL or by visiting the link below.
See if the concierge at your hotel in London can make reservations for you based upon your needs.
Purchase tickets in person at either the Waterloo or Victoria station by visiting the manned service booths or the automated machines.
Pay a little extra for first-class accommodations if you prefer extra elbow room or if you're bringing a lot of luggage.
Choose a restricted ticket, which is non-exchangeable and non-refundable, if you're certain of your travel itinerary and want to save a few dollars.
Take advantage of the free shuttle service at Southampton Central Station, which will take you to the city center or even the Town Quay to catch a ferry to Hythe or the Isle of Wight.