Choose your class of travel. "Standard Class" on the Eurostar is comfortable, "First-Class" seats recline and "First Premium Class" offers a four-course meal during your journey.
Purchase tickets online at the Eurostar Web site and then collect them at your departure station. You can buy Eurostar tickets up to 120 days in advance. See the Resources section below for a link to Eurostar. You can also book train travel from Cambridge to Paris by calling Rail Europe at (888) 382-RAIL or by visiting the link below.
Receive discounts if you qualify. If you are a senior or a youth, you can enjoy serious savings on Eurostar. Holders of BritRail Passes, too, can qualify for a discount.
Catch a train to London. These leave Cambridge several times an hour. You can purchase advance tickets on the BritRail Web site or purchase them at the station. See the Resources section below for a link to BritRail. You can call BritRail at (866) BRITRAIL.
Catch the Underground to Waterloo Station when you arrive in London. There are Underground stops at all London train stations.
Make your way to London's Waterloo Station to catch the Eurostar train to Paris. Your Cambridge train to London will drop you at the King's Cross Station, but the Underground travels between the stations for a moderately easy transfer.