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

Return flights

13 Apr - 17 May	SWISS
01 Apr - 08 Apr	KLM
01 Apr - 20 Apr	KLM
01 Apr - 16 Apr	KLM
09 Apr - 22 Apr	KLM
07 Apr - 22 Apr	KLM
01 Apr - 21 Apr	KLM
09 Apr - 28 Apr	KLM
01 Apr - 17 Apr	KLM
09 Apr - 24 Apr	KLM
01 Apr - 15 Apr	KLM
21 Apr - 19 May	SWISS
21 Apr - 20 May	SWISS
30 Apr - 08 May	SWISS
21 Apr - 15 May	SWISS
20 Apr - 19 May	SWISS
21 Apr - 18 May	SWISS
27 Apr - 05 May	SWISS
21 Apr - 26 May	SWISS
21 Apr - 24 May	SWISS

Also check the deals for one-way flights from London to Islamabad 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 Islamabad in April from $1318

Return flights