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

Return flights

03 Aug - 31 Aug	Etihad Airways
02 Aug - 31 Aug	Etihad Airways
08 Aug - 24 Aug	Etihad Airways
05 Aug - 12 Aug	Air India
05 Aug - 13 Aug	Air India
13 Aug - 09 Sep	Air India
14 Aug - 30 Aug	Air India
07 Aug - 03 Sep	Air India
04 Aug - 10 Aug	Air India
06 Aug - 09 Aug	Air India
06 Aug - 15 Aug	Air India
04 Aug - 16 Aug	Air India
10 Aug - 07 Sep	Etihad Airways
02 Aug - 20 Sep	Etihad Airways
22 Aug - 20 Sep	Air India
28 Aug - 04 Sep	Air India Express
26 Aug - 11 Sep	IndiGo
25 Aug - 07 Sep	IndiGo
26 Aug - 15 Sep	IndiGo
26 Aug - 14 Sep	IndiGo

Also check the deals for one-way flights from Kolkata to London 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Kolkata to London in August from $611

Return flights