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

Return flights

24 Apr - 27 Apr	Lufthansa
22 Apr - 26 Apr	SWISS
27 Apr - 05 May	ITA Airways
21 Apr - 28 Apr	SWISS
14 Apr - 21 Apr	SWISS
21 Apr - 26 Apr	SWISS
07 Apr - 13 Apr	SWISS
23 Apr - 26 Apr	SWISS
24 Apr - 26 Apr	Lufthansa
08 Apr - 15 Apr	SWISS
30 Apr - 05 May	Air Dolomiti
16 Apr - 19 Apr	SWISS
29 Apr - 06 May	SWISS
29 Apr - 10 May	KLM
29 Apr - 07 May	KLM
25 Apr - 13 May	KLM
29 Apr - 04 May	KLM
30 Apr - 06 May	KLM
01 Apr - 06 May	KLM
28 Apr - 03 May	KLM

Also check the deals for one-way flights from London to Istanbul in April.

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 April from $412

Return flights