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

Return flights

02 May - 18 May	Vueling Airlines
16 May - 18 May	Vueling Airlines
06 May - 18 May	Vueling Airlines
07 May - 18 May	Vueling Airlines
14 May - 18 May	Vueling Airlines
18 May - 01 Jun	Vueling Airlines
14 May - 01 Jun	Iberia
03 May - 18 May	Vueling Airlines
15 May - 18 May	Iberia
01 May - 16 May	Vueling Airlines
03 May - 07 May	Vueling Airlines
24 May - 01 Jun	Vueling Airlines
18 May - 24 May	Vueling Airlines
15 May - 01 Jun	Vueling Airlines

Also check the deals for one-way flights from San Sebastian 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.

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from San Sebastian to Istanbul in May from $206

Return flights