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

Return flights

29 Sep - 13 Oct	Qatar Airways
02 Sep - 30 Sep	Aegean Airlines
01 Sep - 20 Sep	British Airways
21 Sep - 27 Sep	Qatar Airways
01 Sep - 21 Sep	Qatar Airways
07 Sep - 21 Sep	Qatar Airways
03 Sep - 28 Sep	British Airways
14 Sep - 21 Sep	Qatar Airways
30 Sep - 18 Oct	Qatar Airways
29 Sep - 18 Oct	Qatar Airways
24 Sep - 11 Oct	Qatar Airways
28 Sep - 19 Oct	Qatar Airways
07 Sep - 20 Sep	Kuwait Airways
14 Sep - 08 Oct	Qatar Airways
17 Sep - 15 Oct	Qatar Airways
24 Sep - 20 Oct	Qatar Airways
24 Sep - 08 Oct	Qatar Airways
03 Sep - 08 Oct	Qatar Airways
15 Sep - 23 Sep	Qatar Airways
17 Sep - 25 Sep	Qatar Airways

Also check the deals for one-way flights from London to Sylhet Osmani in September.

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 September from $1035

Return flights