AirHint found the following cheapest return flights from Islamabad (ISB) to London (STN) in August 2025 (see full year).

Return flights

07 Aug - 06 Sep	PIA
07 Aug - 07 Sep	PIA
07 Aug - 30 Sep	PIA
07 Aug - 01 Sep	PIA
07 Aug - 29 Aug	PIA
07 Aug - 20 Sep	PIA
08 Aug - 28 Sep	PIA
08 Aug - 07 Sep	PIA
01 Aug - 04 Sep	PIA
07 Aug - 12 Sep	Fly Jinnah
08 Aug - 30 Aug	PIA
02 Aug - 25 Aug	PIA
06 Aug - 29 Sep	PIA
01 Aug - 28 Aug	PIA
06 Aug - 28 Aug	PIA
14 Aug - 26 Aug	PIA
15 Aug - 31 Aug	PIA
02 Aug - 22 Aug	PIA
07 Aug - 23 Aug	PIA
08 Aug - 22 Aug	PIA

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

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 Islamabad to London in August from 447€

Return flights