Cheap Bus Services to Paris, Amsterdam, Dublin etc by Eurolines & Maegabus.
The cheapest option travelling between London and many near European cities, notably Paris, Brussels, Amsterdam and Dublin is by scheduled coach.
Once you go further afield in Europe low cost budget airlines like easyJet and Ryanair are often cheaper, especially if you book well in advance.
The dominant coach carrier in terms of choice of destinations from London and frequencies are Eurolines. Eurolines are a confederation of European coach operators working together under a single brand name. In the UK, the operator is National Express the dominant UK scheduled coach operator. Because of the National Express connection you can buy single tickets combiПing a National Express service from most towns and cities in England and Wales with a Eurolines service from London Victoria.
The main competitor of National Express in the UK is called Megabus. and Megabus are also the main competitor for Eurolines most popular European services from London to Paris, Brussels and Amsterdam. Again with Megabus you can interconnect between Megabus UK services and European services on one ticket.
Apart from Eurolines and Megabus there are a several services by Eastern European carriers, notably from Poland aimed at migrants.
In London, the European terminus for both Eurolines and Megabus is Victoria Coach Station. London’s only major coach station that is also the base for National Express and Megabus UK services.