AirHint found the following cheapest return flights from Islamabad (ISB) to London (LHR) in April 2026 (see full year).

Return flights

23 Apr - 30 Apr	Turkish Airlines
26 Apr - 11 May	Turkish Airlines
26 Apr - 10 May	Turkish Airlines
25 Apr - 10 May	Turkish Airlines
20 Apr - 15 May	Turkish Airlines
02 Apr - 09 Apr	AZAL
01 Apr - 06 May	PIA
20 Apr - 05 May	Turkish Airlines
20 Apr - 27 Apr	Turkish Airlines
21 Apr - 28 Apr	Turkish Airlines
03 Apr - 23 Apr	PIA
29 Apr - 21 May	Qatar Airways
06 Apr - 29 Apr	Kuwait Airways
16 Apr - 23 Apr	Turkish Airlines
03 Apr - 24 Apr	PIA	direct
03 Apr - 10 Apr	Turkish Airlines
06 Apr - 15 Apr	Kuwait Airways
01 Apr - 06 May	PIA	direct
02 Apr - 01 May	AZAL
04 Apr - 06 May	Gulf Air

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

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 April from 572€

Return flights