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

Return flights

22 Apr - 29 Apr	Lufthansa
22 Apr - 28 Apr	Lufthansa
09 Apr - 16 Apr	Lufthansa
08 Apr - 15 Apr	Lufthansa
15 Apr - 21 Apr	Lufthansa
15 Apr - 22 Apr	Lufthansa
20 Apr - 22 Apr	Lufthansa
22 Apr - 23 Apr	Lufthansa
23 Apr - 05 May	Lufthansa
15 Apr - 23 Apr	Lufthansa
07 Apr - 13 Apr	Lufthansa
27 Apr - 05 May	Lufthansa
30 Apr - 07 May	Lufthansa
20 Apr - 01 May	Lufthansa
29 Apr - 03 May	Lufthansa
30 Apr - 04 May	Lufthansa
24 Apr - 01 May	Lufthansa
27 Apr - 11 May	Lufthansa
27 Apr - 04 May	Lufthansa
25 Apr - 02 May	ITA Airways

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 267€

Return flights