AirHint found the following cheapest return flights from Kolkata (CCU) to London (LHR) in January 2026 (see full year).

Return flights

28 Jan - 15 Feb	Air India
22 Jan - 29 Jan	Qatar Airways
27 Jan - 02 Feb	Qatar Airways
27 Jan - 03 Feb	Qatar Airways
27 Jan - 01 Feb	Qatar Airways
27 Jan - 31 Jan	Qatar Airways
31 Jan - 22 Feb	IndiGo
23 Jan - 29 Jan	Qatar Airways
23 Jan - 26 Jan	Qatar Airways
28 Jan - 07 Feb	Air India
28 Jan - 13 Feb	SpiceJet
26 Jan - 02 Feb	Air India
26 Jan - 31 Jan	Qatar Airways
24 Jan - 29 Jan	Qatar Airways

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

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 January from $730

Return flights