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

Return flights

05 May - 12 May	Wizz Air UK
12 May - 19 May	Wizz Air UK
08 May - 11 May	Wizz Air UK
09 May - 11 May	Air Serbia	direct
25 May - 30 May	Air Serbia	direct
14 May - 18 May	Air Serbia	direct
16 May - 21 May	Air Serbia	direct
22 May - 29 May	Air Serbia	direct
23 May - 29 May	Air Serbia	direct
24 May - 29 May	Air Serbia	direct
11 May - 02 Jun	TAROM
21 May - 07 Jun	Wizz Air
31 May - 07 Jun	LOT
21 May - 07 Jun	Pegasus Airlines	direct
11 May - 02 Jun	Air Serbia	direct
31 May - 07 Jun	AJet	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 146€

Return flights