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

Return flights

21 Apr - 22 Apr	Lufthansa
23 Apr - 29 Apr	Lufthansa
17 Apr - 20 Apr	Lufthansa
24 Apr - 29 Apr	Lufthansa
30 Apr - 05 May	Lufthansa
22 Apr - 29 Apr	Lufthansa
27 Apr - 08 May	Lufthansa
13 Apr - 20 Apr	Lufthansa
10 Apr - 14 Apr	Lufthansa
20 Apr - 24 Apr	Lufthansa
24 Apr - 27 Apr	Lufthansa
10 Apr - 13 Apr	Lufthansa
24 Apr - 01 May	Lufthansa
27 Apr - 01 May	Lufthansa
29 Apr - 10 May	Lufthansa
30 Apr - 03 May	Lufthansa

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 $306

Return flights