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

Return flights

04 May - 15 May	Air France
04 May - 15 May	Turkish Airlines	direct
03 May - 16 May	Air France
03 May - 16 May	Turkish Airlines	direct
23 May - 06 Jun	KLM
26 May - 09 Jun	Air France
26 May - 09 Jun	Turkish Airlines	direct
23 May - 06 Jun	Turkish Airlines	direct

Also check the deals for one-way flights from Houston 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 Houston to Istanbul in May from 730€

Return flights