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

Return flights

24 Aug - 14 Sep	PIA
07 Aug - 04 Sep	AZAL
07 Aug - 17 Sep	AZAL
04 Aug - 29 Sep	Fly Jinnah
04 Aug - 30 Sep	Fly Jinnah
04 Aug - 23 Sep	Fly Jinnah
07 Aug - 28 Aug	AZAL
07 Aug - 30 Sep	British Airways
06 Aug - 20 Aug	Etihad Airways
19 Aug - 28 Aug	Etihad Airways
07 Aug - 17 Aug	Turkish Airlines
02 Aug - 04 Aug	Fly Jinnah
27 Aug - 05 Sep	flydubai
17 Aug - 31 Aug	Qatar Airways

Also check the deals for one-way flights from Islamabad to Lisbon 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 Lisbon in August from 672€

Return flights