Travel on Megabus, Bus and Scotrail coaches to St. Andrews at great prices. Omio finds you coach times and tickets for over 1000 travel companies all in one place.
FlixBus is one of Europe's leading low-cost coach operators, founded in Germany and offering long-distance coach services in Europe and the U. S. FlixBus also operates overnight coaches on select routes throughout Europe. Standard amenities on FlixBus include free Wi-Fi, power outlets to charge your phone, tablet or laptop during long coach journeys, extra legroom, luggage space and toilets. You can even purchase snacks and drinks onboard. FlixBus offers only the Standard ticket for all its routes, which allows you to bring one hand luggage and one hold luggage per person. Additional fees apply for extra luggage and specific seat reservations, such as if you want to book an Extra Seat, Table Seat or the Panorama Seat.
Here are some other resources that might have the information you need