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

Return flights

13 May - 21 May	Scandinavian Airlines
11 May - 18 May	Icelandair
29 May - 12 Jun	KLM
26 May - 09 Jun	Icelandair
13 May - 21 May	Turkish Airlines	direct
11 May - 18 May	Turkish Airlines	direct
26 May - 09 Jun	Turkish Airlines	direct
29 May - 12 Jun	Turkish Airlines	direct

Also check the deals for one-way flights from Chicago 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 Chicago to Istanbul in May from 472€

Return flights