By road:

Canterbury district has excellent road links with the M20 (M25/M26) and M2 motorways, providing easy links with London and its airports.

By rail:

Canterbury has two mainline stations, East and West, and is served by frequent trains to and from London Charing Cross, Waterloo East and London Victoria, as well as to and from Dover Priory. If you travel by Eurostar to Ashford International there is a regular train service to Canterbury West.  
http://www.nationalrail.co.uk
http://www.southeasternrailway.co.uk
http://www.thetrainline.com
http://www.eurostar.com
http://www.raileurope.com

By bus:

The district is well served by Stagecoach East Kent buses from Canterbury Bus Station.
http://www.stagecoachbus.com/eastkent/

By coach: 

The district is well served by National Express coaches. Coaches travel regularly to and from Canterbury Bus Station to London Victoria and Dover bus stations.
http://www.nationalexpress.com

By sea:

There are ferry connections from Calais to Dover or you can take your car through the Channel Tunnel from Calais to Folkestone.
http://www.doverport.co.uk
http://www.eurotunnel.com

By air:

London Gatwick, Heathrow, Stansted, Luton and London City airports are well within 2 hours' drive.