To Skiathos by Direct Flight, Flight/Ferry, Overland

Airport (JSI) hadirect (BA) and charter flights (2½-3½hrs) from UK and Europe - click -> 'Skiathos Flights'. Visitors to Skopelos and Alonnisos need  2-3 hrs transfer by jet Catamaran.
Also,  daily flights via Athens, then Skiathos by Aegean Air (45mins) or coach and catamaran (min. 4hrs). Skiathos Airport capacity trebled in 2017; fares fell 25%, and BA began hi-season flights from London (LCY).
Or for similar family travel cost (inc saving Skiathos car-hire) ... if you can take a 2+ week break, you can drive over, with options of a mini-tour of the Swiss and Greek Alps, with Venice or Athens stop-overs! (total time at wheel from Calais 18½ hrs, plus 1½ days on a de-luxe ferry).

Skiathos airport - 'plane-spotter's beach'!                                                                                                                                Hi-speed catamaran via Athens

For best direct-flight deals, first check the 'flight-only' websites of the main holiday tour operators ( TUI (ex-Thomson); any Greek holiday specialist.
Do check airlines direct (click -> 'Skiathos Flights'), because none of the 'usual suspect' internet cheap-flight agents cover all Skiathos possibilities.

For a call-back with suggestions for flight and road routes and overnights, email me at viviennes.villa@gmail.com, or send an "Enquire Now" message.

Arrival and after
Usually your villa's 'meet-and-greeter' will find you at point of arrival, help you find your hire-car (you pre-book) or taxi, and guide you to the villa (most within 10-25 mins drive) ... or the owner may send you a map and directions (see villa page). Also, to everyone who books from 'Skiathos Greek Villas.com', I send my much-praised 'Villa Guest Guide' Parts 2 and 3 ('Skiathos and the Islands', and 'Some handy Greek; Food and Drink')

Classic 'Flying Dolphin' local hydrofoil                                                                                                                                   Or 18 hrs at the wheel from Calais