You can travel to Copenhagen via bus and train. For example, travel with the Eurostar to Brussels (prices from £44) and from here with Flixbus to Copenhagen (prices from £32).
Copenhagen is also within easy to reach using direct flights from London, Bristol, Manchester, Liverpool and Edinburgh.
SAS flies from Stansted and Heathrow to Copenhagen with prices starting from £38 one way. CO2 offsetting is included in all Youth tickets. You can calculate the CO2 emission on your trip using their emission calculator.
BA has flights from Heathrow to Copenhagen with prices starting from £38 one way. Via BA’s carbon reduction tool, you can calculate your CO2 emission and offset by contributing to an emission reduction project.
Ryanair operates from Stansted to Copenhagen and Liverpool to Copenhagen starting at £9.99 one way.
EasyJet connects Gatwick and Edinburgh to Copenhagen with prices from £25 one way.
Norwegian offers flights from Gatwick and Edinburgh to Copenhagen starting at £30.