The New York Post report that Del Rey's management and Interscope's Jimmy Iovine decided to postpone in the wake of the poor response to her Saturday Night Live performance.
According to the Post, Iovine felt that Lana "wasn't ready" to tour and that further critical bashing would "hurt" sales of 'Born To Die', which this week topped the UK album chart.
A source claims the delay "allows time for [Lana] to clear her head, then go back to selling tickets. More importantly, they figure, the extra time gives them more distance from ‘SNL'".
The 30-date American tour was due to start next month.