The Foreign Office has warned that the security situation in Turkey "remains potentially volatile" after Friday night's attempted coup.
Some flights have been cancelled to and from Turkey after more than 160 people were killed, although some carriers have said they intend to maintain their schedule.
Britons in the country were advised to stay indoors following a night of gunfire and explosions in Ankara and Istanbul and reports of shooting near the tourist resort of Marmaris. If you have a flight booked to Turkey, and are unsure whether or not to travel, here we look at the various travel advice that has been broadcast.
Foreign Office advice
Advice on the Foreign Office website said: "The situation in Turkey appears to be calming following an attempted coup overnight on July 15-16. The security environment, however, remains potentially volatile.
"Following earlier disruption, flights to and from airports in Turkey are returning to normal, although some disruption remains and you should check with your airline or tour operator before travelling. You may need to turn up at the airport earlier than normal to get through the additional security checks in place.
"If you are in Turkey, please follow the advice of the authorities, closely monitor travel advice and contact your airline or tour operator. In Ankara and Istanbul we advise you to avoid public places, in particular demonstrations, and remain vigilant. Take sensible precautions if you are in the vicinity of any military or security forces. Roadblocks are in place in some areas.
"The coastal resorts do not appear to be significantly affected at present. You should check with your airline or tour operator before travelling to the airport. Continue to exercise vigilance in resort areas."
The UK's largest travel association, Abta, said the situation remains "fluid", adding: "Abta recommends that members of the public read and follow the Foreign & Commonwealth Office (FCO) advice and any advice or instructions issued by their travel provider or airline. There has been no change to FCO advice regarding travel to Turkey and holiday programmes to the resort areas continue to operate.
"The vast majority of British travellers to Turkey will fly directly to the beach resorts on Turkey's south coast which are hundreds of miles away from Istanbul and the capital Ankara."
Abta estimates that there are currently 50,000 people on holiday with its members in Turkey, while the Foreign Office said more than 2.5 million British nationals visit Turkey every year.
BA cancelled all flights to and from Turkey on Saturday and are set to reduce their schedule on Sunday.
On Saturday evening a BA spokesman said: "We'll be flying a reduced schedule to Turkey tomorrow (Sunday July 17), however these flights may be subject to some delays. We continue to keep our flights to Turkey under review and we recommend that customers check ba.com for the latest information."
Thomas Cook had been advising customers to "stay in their hotels until further notice", but a later statement from the company - which offers holidays to places such as Marmaris, Bodrum and Antalya - said: "Our flight and holiday programme is operating as normal and our staff on the ground in resort tell us that everything is calm and customers are enjoying their holidays."
Some carriers are flying as normal
An easyJet spokeswoman said the airline did not expect any changes to its schedule, while Turkish Airlines advised passengers to check the latest flight information due to cancellations. Thomson and First Choice flights to Dalaman, Antalya and Izmir are operating as normal.