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

Return flights

02 Dec - 16 Dec	Kuwait Airways
04 Dec - 15 Dec	Kuwait Airways
15 Dec - 15 Jan	Eurowings
01 Dec - 15 Dec	Kuwait Airways
29 Dec - 26 Jan	Kuwait Airways
29 Dec - 19 Jan	Kuwait Airways
01 Dec - 19 Jan	Kuwait Airways
01 Dec - 22 Dec	Kuwait Airways
30 Dec - 18 Jan	Kuwait Airways
01 Dec - 18 Jan	Kuwait Airways
01 Dec - 26 Dec	Kuwait Airways
04 Dec - 15 Jan	Kuwait Airways
06 Dec - 24 Dec	Austrian Airlines
06 Dec - 21 Dec	Austrian Airlines
26 Dec - 26 Jan	Kuwait Airways
26 Dec - 18 Jan	Kuwait Airways
07 Dec - 25 Dec	Saudia
26 Dec - 30 Jan	Kuwait Airways
01 Dec - 21 Dec	Air India
03 Dec - 17 Dec	Kuwait Airways

Also check the deals for one-way flights from London to Sylhet Osmani 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 Sylhet Osmani in December from 699€

Return flights