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

Return flights

11 Dec - 05 Jan	Akasa Air
18 Dec - 31 Dec	Akasa Air
22 Dec - 07 Jan	SWISS
20 Dec - 11 Jan	IndiGo
24 Dec - 31 Dec	IndiGo
24 Dec - 19 Jan	Emirates
19 Dec - 19 Jan	Emirates
19 Dec - 12 Jan	Emirates
19 Dec - 31 Jan	Emirates
24 Dec - 11 Jan	Emirates
24 Dec - 10 Jan	Emirates
21 Dec - 19 Jan	Emirates
02 Dec - 09 Dec	IndiGo
21 Dec - 30 Dec	Emirates
09 Dec - 12 Dec	IndiGo
18 Dec - 25 Dec	Emirates
04 Dec - 07 Dec	Emirates
08 Dec - 21 Dec	IndiGo
02 Dec - 10 Dec	IndiGo
01 Dec - 10 Dec	IndiGo

Also check the deals for one-way flights from Kolkata to London 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 Kolkata to London in December from $670

Return flights