AirHint found the following cheapest return flights from London (LHR) to Colombo (CMB) in August 2025 (see full year).

Return flights

27 Aug - 24 Sep	Aegean Airlines
27 Aug - 16 Sep	Aegean Airlines
24 Aug - 16 Sep	British Airways
24 Aug - 24 Sep	British Airways
27 Aug - 22 Sep	Aegean Airlines
27 Aug - 10 Sep	Aegean Airlines
27 Aug - 30 Sep	Aegean Airlines
28 Aug - 16 Sep	British Airways
24 Aug - 23 Sep	British Airways
28 Aug - 29 Sep	British Airways
12 Aug - 15 Aug	Air India
12 Aug - 19 Aug	Air India
12 Aug - 16 Aug	Air India
05 Aug - 12 Aug	Air India
06 Aug - 11 Aug	Air India
06 Aug - 12 Aug	Air India
05 Aug - 10 Aug	Air India
05 Aug - 11 Aug	Air India
07 Aug - 13 Aug	Air India
07 Aug - 12 Aug	Air India

Also check the deals for one-way flights from London to Colombo in August.

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 Colombo in August from $700

Return flights