AirHint found the following cheapest return flights from Belgrade (BEG) to Istanbul (IST) in May 2026 (see full year).

Return flights

01 May - 07 May	Pegasus Airlines
01 May - 07 May	Pegasus Airlines	direct
04 May - 11 May	Pegasus Airlines	direct
28 May - 01 Jun	Pegasus Airlines	direct
18 May - 24 May	Pegasus Airlines	direct
02 May - 05 May	LOT
26 May - 31 May	Air Serbia	direct
01 May - 05 May	Pegasus Airlines
01 May - 05 May	Turkish Airlines	direct
08 May - 29 May	Air Serbia	direct
04 May - 09 May	Air Serbia	direct

Also check the deals for one-way flights from Belgrade to Istanbul 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.

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Cheapest return flights from Belgrade to Istanbul in May from $216

Return flights