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

Return flights

21 Dec - 13 Jan	Air India
19 Dec - 25 Jan	Etihad Airways
21 Dec - 25 Jan	IndiGo
20 Dec - 25 Jan	IndiGo
19 Dec - 10 Jan	Etihad Airways
14 Dec - 24 Jan	Air India
21 Dec - 11 Jan	IndiGo
21 Dec - 12 Jan	IndiGo
08 Dec - 05 Jan	Air India
08 Dec - 06 Jan	Air India
23 Dec - 31 Dec	Air India
24 Dec - 30 Dec	Air India
24 Dec - 27 Dec	Air India
18 Dec - 25 Dec	Qatar Airways
17 Dec - 25 Dec	Air India
19 Dec - 24 Dec	Etihad Airways
07 Dec - 08 Dec	Air India
09 Dec - 16 Dec	IndiGo
12 Dec - 15 Dec	Air India
16 Dec - 22 Dec	Air India

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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Kolkata to London in December from $614

Return flights