AirHint found the following cheapest one-way flights from Istanbul (IST) to Sofia (SOF) in May 2026 (see full year).

One-Way flights

01 May	SKY express
19 May	Aegean Airlines
01 May	Turkish Airlines	direct
25 May	Aegean Airlines
07 May	Aegean Airlines
25 May	Turkish Airlines	direct
07 May	Turkish Airlines	direct
19 May	Turkish Airlines	direct
09 May	flydubai

Also check the deals for return flights from Istanbul to Sofia in May.

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.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest one-way flights from Istanbul to Sofia in May from 125€

One-Way flights