People due to travel to Istanbul should speak to their travel company or airline if they have concerns about their journey, the Association of British Travel Agents (ABTA) has said.
It said travellers should follow Foreign Office advice, which says tourists should be alert to their surroundings.
An ABTA spokesman said: "People due to travel should speak to their travel company or airline for information about travel to and from Istanbul. Flights to and from Ataturk International Airport are resuming gradually."
Most British holidaymakers visit the beach resorts on Turkey's southern coast, the association said, adding that "Istanbul’s popularity as a city break destination has declined" following incidents earlier this year.
Suicide bombers targetting Istanbul's airport incited panic to take lethal advantage in an attack that echoed the Brussels airport atrocity.
The gun and bomb attack at Istanbul's Ataturk Airport is the latest in a series of deadly incidents in Turkey this year.
Istanbul's busiest airport has been targeted in a deadly gun and bomb attack - here's what we know so far.