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

Return flights

27 May - 25 Jun	ITA Airways
23 May - 23 Jun	Luxair
20 May - 14 Jun	KLM
08 May - 22 May	SWISS
06 May - 19 May	SWISS
24 May - 31 May	SWISS
29 May - 11 Jun	SWISS
25 May - 04 Jun	SWISS
22 May - 12 Jun	SWISS
30 May - 15 Jun	KLM
13 May - 03 Jun	KLM
01 May - 31 May	SWISS
06 May - 17 May	SWISS
05 May - 19 May	SWISS
01 May - 12 May	Lufthansa
28 May - 11 Jun	SWISS
05 May - 16 Jun	SWISS
11 May - 19 May	SWISS
07 May - 28 May	Aer Lingus
08 May - 23 May	SWISS

Also check the deals for one-way flights from London to Islamabad in May.

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 May from $889

Return flights