As cuts to air passenger duty (APD) are set to encourage new and cheaper domestic flights from 1 April, the consumer group said train travellers are already paying a premium on many routes.
Which? carried out research to find the cheapest available options for travelling by train and by plane over the Easter break on 10 UK routes, and assessed the carbon emissions for each option.
It found plane journeys emit twice the CO2 on average (118% more) when compared with travelling by train, while train tickets are 35% dearer. Just three out of 10 routes are cheaper by train.
