While cities such as Rome, Barcelona and Paris remain popular with Brits looking for a weekend or mid-week break, cheap flights to destinations like eastern Europe and the US were increasingly in demand.
Neil Smillie of Holidays-Direct said that, generally, popularity of some destinations was reliant upon the time of year and weather and low-cost flights meant more holidaymakers were combining a city break with a beach holiday.
"It is true to say that the world is getting smaller in terms of city breaks as customers continue to explore new places in shorter amounts of time," he said.
"From America to the Baltics, we are seeing many more people taking their city break explorations further away."
He predicted that destinations in eastern Europe and in Scandinavia would open up the city breaks market, driven by consumer demand to explore new places.
Simple Overseas Properties foreign investment company said that Morocco was an emerging market for tourists and was aiming for ten million annually by 2010.