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

Return flights

06 Dec - 11 Dec	Pegasus Airlines
07 Dec - 15 Jan	Pegasus Airlines
04 Dec - 18 Jan	Pegasus Airlines
04 Dec - 18 Dec	AJet
07 Dec - 21 Dec	Pegasus Airlines
02 Dec - 14 Dec	AJet
01 Dec - 07 Dec	Pegasus Airlines
02 Dec - 07 Dec	AJet
11 Dec - 15 Jan	Wizz Air UK
16 Dec - 15 Jan	Wizz Air UK
30 Dec - 22 Jan	Wizz Air UK
11 Dec - 14 Dec	Ryanair
11 Dec - 18 Dec	Ryanair
18 Dec - 18 Jan	Ryanair
14 Dec - 21 Dec	Ryanair
17 Dec - 15 Jan	Ryanair
13 Dec - 18 Jan	Wizz Air UK
14 Dec - 18 Jan	Ryanair
07 Dec - 17 Dec	Pegasus Airlines
05 Dec - 15 Jan	Ryanair

Also check the deals for one-way flights from London to Islamabad 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 London to Islamabad in December from $466

Return flights