Network Rail bosses travelling on business spent £1.3million on UK flights in the last year because it was cheaper than taking the train.
Employees of the public sector body took 8,353 flights from April 2013 to March 2015 and spent £1.1million on 2,907 international flights.
The figures, revealed following a Freedom of Information Request submitted by The Sun, show around 90 per cent of the domestic flights were to Scotland.