Like the UK, the Channel Islands are outside the Schengen Agreement but form a Common Travel Area with the UK, Republic of Ireland and Isle of Man.
By plane
Guernsey airport
IATA: GCI ICAO: EGJB (http://www.guernsey-airpo...) - to/from the UK London Gatwick, London Stansted, Bristol, Birmingham, Bournemouth, Exeter, Manchester and Southampton, France Dinard and St Brieuc, Jersey, Alderney, Germany Dusseldorf and Stuttgart and Rotterdam in the Netherlands.
By ship
St Peter Port, Guernsey
to/from the UK Poole, Portsmouth and Weymouth, St Malo in France and other Channel Islands.