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

Return flights

11 Dec - 15 Jan	AZAL
07 Dec - 15 Jan	AZAL
18 Dec - 10 Jan	AZAL
07 Dec - 10 Jan	AZAL
14 Dec - 07 Jan	AZAL
18 Dec - 13 Jan	AZAL
18 Dec - 08 Jan	AZAL
18 Dec - 04 Jan	AZAL
04 Dec - 10 Dec	AZAL
18 Dec - 30 Jan	AZAL
11 Dec - 30 Dec	AZAL
12 Dec - 15 Jan	Fly Jinnah
03 Dec - 09 Dec	Fly Jinnah
02 Dec - 09 Dec	Fly Jinnah
20 Dec - 30 Dec	Fly Jinnah
18 Dec - 25 Dec	AZAL
11 Dec - 31 Dec	AZAL
10 Dec - 30 Dec	Etihad Airways
15 Dec - 27 Dec	Fly Jinnah
11 Dec - 18 Dec	AZAL

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

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 December from 377€

Return flights