AirHint found the following cheapest return flights from Istanbul (IST) to Sofia (SOF) in July 2026 (see full year).

Return flights

15 Jul - 20 Jul	Air Serbia
16 Jul - 21 Jul	Air Serbia
16 Jul - 19 Jul	Turkish Airlines	direct
16 Jul - 21 Jul	Turkish Airlines	direct
15 Jul - 20 Jul	Turkish Airlines	direct
01 Jul - 01 Jul	Turkish Airlines
01 Jul - 01 Jul	Turkish Airlines	direct
31 Jul - 14 Aug	SKY express

Also check the deals for one-way flights from Istanbul to Sofia in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Istanbul to Sofia in July from $207

Return flights