The following links might be helpful in organizing your travel:
In general
www.goeuro.de
By train
www.bahn.de
www.global.flixbus.com
By aircraft
www.TUIfly.com
www.easyjet.com
www.eurowings.com
www.ryanair.com
By bus
Bus-Shuttle
www.busradar.com
www.eurolines.de
www.flixbus.co.uk
By lift agency
www.blablacar.co.uk/