There are passenger and car ferries sailing between the UK- Poole, and Portsmouth- as well as between Jersey and Guernsey. A regular ferry service is also operated by Condor Ferries between Jersey and St Malo in France. [Book here…]
Easyjet flies from Gatwick to Jersey- about a 35 mins flight- as well as from Belfast, Edinburgh, Glasgow, Liverpool, Luton, Manchester, and Newcastle.
British Airways has daily flights between Jersey and Gatwick airport.