She works for
Dreams Unlimited so knows her stuff
Presume you mean London
There are three main airports nearby in London, Heathrow, Gatwick and Stanstead, each are on the motorway network, (freeways).
M25 and m20 to Dover is easy.
Trains run from all and are on the airports but would require a change in London on the Tube.
I would come in a few days before and stay in London, its a great place to visit, then continue to Dover.
If going by Car, car hire or private town car transfer would be best, but train is also possible.
Disneyland paris is an easy option as well, Fly into Paris stay DLP, get the Eurostar to Ashford and short taxi to Dover.
Dover is about 45 mins from me by car, and 75 mns by train or car from central London, Heathrow would be a bit more.