Ist To Sofia ^new^ Direct

: Direct flights take approximately 1 hour and 15–20 minutes .

If you search for direct flights from (Istanbul Airport) to SOF (Sofia Airport), you will find multiple daily departures. This is the most expensive option but saves significant time. ist to sofia

Search flights from Istanbul (IST) to Sofia (SOF) - Booking.com : Direct flights take approximately 1 hour and

He paid her in old Bulgarian leva, the kind with the lion on them. She drove back to Istanbul with the window down, cold air whipping her face. The passenger seat felt empty now. Too quiet. And for the rest of her life, whenever a heater rattled or roses bloomed out of season, she thought of the thing she’d carried—and how, somewhere between two cities, it had almost woken up. Search flights from Istanbul (IST) to Sofia (SOF) - Booking

You save a night of hotel costs. It is an old-school travel experience. Cons: The train is slower than the bus (11+ hours), the carriages are vintage (not luxury), and the toilet situation can be rough.