Thomas Cook Holidays: four nights at the Hotel de France in St Helier costs £373 per person from May to September, including return travel by air, and breakfast.
Preston Holidays: four nights at the St Pierre Park Hotel in Guernsey costs £441 per person in June and July, including bed and breakfast and flights from Gatwick.
Islanders: Five nights at La Sablonnerie on Sark costs £492 half-board in June. Scheduled flights start at £119 and the ferry crossing from Guernsey is £32 return, including transfers.