AirHint found the following cheapest return flights from London (LCY) to Istanbul (SAW) in May 2026 (see full year).

Return flights

07 May - 03 Jun	KLM
07 May - 14 May	SWISS
11 May - 14 May	KLM
06 May - 13 May	KLM
06 May - 03 Jun	KLM
13 May - 20 May	KLM
06 May - 12 May	KLM
26 May - 29 May	KLM
12 May - 21 May	KLM
11 May - 21 May	KLM
11 May - 18 May	KLM
06 May - 14 May	KLM
28 May - 02 Jun	KLM
15 May - 15 Jun	KLM
13 May - 16 Jun	KLM
23 May - 07 Jun	KLM
29 May - 02 Jun	KLM
29 May - 24 Jun	KLM
05 May - 09 Jun	KLM
31 May - 07 Jun	KLM

Also check the deals for one-way flights from London 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 London to Istanbul in May from $388

Return flights