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

Return flights

30 Dec - 30 Jan	Eurowings
31 Dec - 28 Jan	Eurowings
27 Dec - 28 Jan	Qatar Airways
27 Dec - 27 Jan	Qatar Airways
29 Dec - 26 Jan	Saudia
31 Dec - 26 Jan	British Airways
31 Dec - 23 Jan	Eurowings
31 Dec - 27 Jan	Eurowings
31 Dec - 20 Jan	Qatar Airways
31 Dec - 19 Jan	Qatar Airways
27 Dec - 29 Dec	Saudia
28 Dec - 31 Dec	LOT
27 Dec - 31 Dec	LOT
29 Dec - 31 Dec	Saudia
28 Dec - 29 Dec	Saudia
30 Dec - 31 Dec	Saudia
27 Dec - 30 Dec	AZAL

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 642€

Return flights