Embarking on a journey from Tonga to Turkey requires a visa, and while a tourist visa is a popular option for exploring the rich history and vibrant bazaars of cities like Istanbul, you can also apply for work or student visas if your purpose extends beyond leisure. Remember that Turkish immigration typically allows stays of up to 90 days on a tourist visa, and processing times can vary, so plan your travel well in advance. Given the significant distance, most travelers will opt for flights with at least one layover, often in hubs like Dubai or Singapore, and while the Turkish Lira is the currency, familiarizing yourself with a few basic Turkish phrases can greatly enhance your experience, especially outside major tourist centers.