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

Return flights

01 May - 22 May	Spirit Airlines
07 May - 11 May	Spirit Airlines
13 May - 31 May	Austrian Airlines
01 May - 08 May	Spirit Airlines
13 May - 22 May	Austrian Airlines
18 May - 31 May	Brussels Airlines
09 May - 15 May	Spirit Airlines
02 May - 16 May	Spirit Airlines
01 May - 15 May	Spirit Airlines
07 May - 22 May	Spirit Airlines
26 May - 23 Jun	KLM
29 May - 25 Jun	Spirit Airlines
26 May - 23 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 555€

Return flights