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

Return flights

05 May - 12 May	Spirit Airlines
04 May - 16 May	Spirit Airlines
18 May - 25 May	Brussels Airlines
26 May - 29 May	KLM
26 May - 30 May	KLM
18 May - 30 May	Brussels Airlines
01 May - 07 Jun	KLM
16 May - 30 May	KLM
19 May - 02 Jun	Spirit Airlines
21 May - 02 Jun	KLM
20 May - 27 May	United
22 May - 31 May	Spirit Airlines
04 May - 16 May	Turkish Airlines	direct
01 May - 07 Jun	Turkish Airlines	direct
19 May - 02 Jun	Turkish Airlines	direct
21 May - 02 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 561€

Return flights