The business, which is owned by private equity group Exponent Private Equity, said bargain-savvy train travellers helped propel turnover to £106m from £96m for the year ending March 2012.
The site, which offers price comparisons of tickets and lets customers book online, helped its parent company Trainline.com reach pre-tax profits of £38.5m– a 33 per cent increase on the year previously.
“Customers have migrated from stations to online as a means of finding the best available fares,” it said.
Thetrainline.com was snapped up by Exponent for £163m in 2006 from a consortium of heavyweight rail players, including Virgin, Stagecoach and National Express. The firm operates sales under a licence provided by the Association of train Operating Companies, a consortium of 24 rail operators.
Rail ticket sales across the UK shot up last year, reaching £1.3bn of total sales versus £1.1bn in 2011.