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

Return flights

02 Mar - 11 Mar	KLM
05 Mar - 11 Mar	KLM
05 Mar - 09 Mar	KLM
10 Mar - 16 Mar	KLM
05 Mar - 26 Mar	KLM
10 Mar - 17 Mar	KLM
05 Mar - 12 Mar	KLM
10 Mar - 14 Mar	KLM
06 Mar - 13 Mar	KLM
02 Mar - 05 Mar	KLM
18 Mar - 01 Apr	Lufthansa
23 Mar - 01 Apr	Lufthansa
25 Mar - 01 Apr	Lufthansa
27 Mar - 02 Apr	KLM
25 Mar - 09 Apr	Lufthansa
26 Mar - 02 Apr	KLM
31 Mar - 08 Apr	Lufthansa
30 Mar - 09 Apr	Lufthansa
30 Mar - 17 Apr	Lufthansa
20 Mar - 17 Apr	Lufthansa

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 181€

Return flights