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	Turkish Airlines
26 Sep - 17 Oct	Turkish Airlines
24 Sep - 17 Oct	Turkish Airlines
28 Sep - 17 Oct	LOT
26 Sep - 12 Oct	Turkish Airlines
25 Sep - 19 Oct	Turkish Airlines
26 Sep - 19 Oct	Turkish Airlines
26 Sep - 13 Oct	Turkish Airlines
29 Sep - 12 Oct	Turkish Airlines
24 Sep - 19 Oct	Air India
23 Sep - 30 Sep	Aegean Airlines
23 Sep - 28 Sep	Air India
26 Sep - 29 Sep	Turkish Airlines
24 Sep - 28 Sep	Aegean Airlines
25 Sep - 28 Sep	Turkish Airlines
22 Sep - 28 Sep	Turkish Airlines
22 Sep - 24 Sep	Saudia
24 Sep - 26 Sep	Air India
22 Sep - 26 Sep	Saudia
28 Sep - 29 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.

Book a cheap hotel in Sylhet Osmani

Cheap car rent in Sylhet Osmani

Cheapest return flights from London to Sylhet Osmani in September from 620€

Return flights