KinClan MPV Executive Travel specialise in long distance transfers to/from anywhere in Scotland and across the UK. Their fleet of executive minivans can seat up to 8 passengers each. Baby, child & booster seats are provided free of charge, on request. Complimentary meet & greet service for all airport pick ups.
Scotland's national train network is serviced by Scotrail who provide an extensive rail network throughout the Lowlands and some parts of the Highlands. They also provide a direct rail link between Prestwick Airport and Glasgow.
If you are travelling between England and Scotland by train, tickets generally go on sale three months prior to the departure date and increase in price closer to the travel date, therefore the cheapest fares can be found about 90 days before. I generally use https://www.thetrainline.com/ price comparison site for booking long distance rail tickets. It can also sometimes be cheaper buying split tickets, for example, buying 1 x single from London Euston to Birmingham New Street, plus 1 x single from Birmingham New Street to Preston, plus 1 x single from Preston to Glasgow Central, can offer be cheaper than buying one ticket from London to Glasgow and you don't necessarily have to leave the train during the journey either. You could try your luck on the http://splitmyfare.co.uk website.
Domestic flights with the British Isles are primarily provided by the following airlines; flybe.com,easyjet.com and loganair.co.uk
(Scotland's airline, flying mostly to the Hebrides, Northern Isles and provincial English Airports).
Scotland is well connected to the main European hub airports of Amsterdam (klm.com direct flights to Edinburgh, Glasgow, Aberdeen and Inverness, Paris CDG (easyjet.com and airfrance.com direct flights to Glasgow, Edinburgh and Aberdeen), Dusseldorf (loganair.co.uk andlufthansa.com direct flights to Glasgow and Edinburgh), Frankfurt (lufthansa.comdirect flights to Glasgow and Edinburgh), Madrid (iberia.com and easyjet.com direct flights to Edinburgh) and Rome (jet2.com direct flights to Glasgow), plus many other direct flights between Scottish airports and mainland Europe.
If you are flying into Scotland directly from North America then there are a number of routes you can consider, including; Newark to Glasgow (delta.com), Newark to Edinburgh (united.com), JFK to Glasgow (united.com), Orlando to Glasgow (virginatlantic.com), Philadelphia to Edinburgh (aa.com), JFK to Edinburgh (delta.com), Boston to Edinburgh (delta.com) , Chicago & Washington DC to Edinburgh (both united.com), Toronto to Edinburgh (flyrouge.com), Toronto to Glasgow (flyrouge.com& airtransat.com). Many North American and clients have told me that the best value fares they have found for travelling to Scotland is with aerlingus.com and icelandair.com travelling via Dublin and Keflavik resepectively.
For visitors flying in from Australasia, South East Asia and the Arabian Pennsula there are direct flights from Dubai to both Glasgow and Edinburgh (emirates.com) and from Doha and Abu Dhabi to Edinburgh (qatarairways.com andetihad.comresectively) which offer excellent links to/from Australia, New Zealand and Asia.