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

Return flights

10 Mar - 19 Mar	KLM
11 Mar - 18 Mar	KLM
02 Mar - 08 Mar	KLM
26 Mar - 02 Apr	KLM
27 Mar - 29 Mar	KLM
16 Mar - 23 Mar	Lufthansa
26 Mar - 30 Mar	Lufthansa
26 Mar - 09 Apr	KLM
30 Mar - 07 Apr	Lufthansa
18 Mar - 27 Mar	Lufthansa
31 Mar - 08 Apr	Lufthansa
27 Mar - 05 Apr	KLM
27 Mar - 30 Mar	KLM
26 Mar - 12 Apr	KLM
27 Mar - 06 Apr	KLM
16 Mar - 19 Mar	Lufthansa
27 Mar - 12 Apr	KLM
31 Mar - 06 Apr	KLM
14 Mar - 18 Mar	SWISS

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

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 March from $251

Return flights