Some 14 per cent of people quizzed said they were dating a partner who lives more than two hours' drive away - double the rate of ten years ago.
More than three-quarters of them said it was now far easier to enjoy a long-distance relationship - thanks to networking sites, videophone calls and text messaging.
And 10 per cent of the 2,000 adults polled admitted dating people they met through Internet dating or social websites.
One in four had begun a relationship over the net at some point.
But telephone remains the most common way to stay in touch during a long-distance relationship. It was followed by text and email, the report by BT found.
"The world is getting smaller all the time as communication gets more efficient - causing this boom," The Sun quoted a rep, as saying.