You didn't think to mention your nationality? Some don't require visa for Turkey at all. Most can get an e-visa, which costs USD 20. Some require a proper visa, which will be more expensive.
From the UK ￡20. Use the official Turkish government website in the link, other sites will scam you!
https://www.evisa.gov.tr/en/
thanks so much! June Ellis LEEDS, W.Yorkshire
