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

Return flights

20 May - 27 May	Air India
19 May - 25 May	Air India
19 May - 26 May	Air India
27 May - 01 Jun	Air India
20 May - 03 Jun	Air India
11 May - 26 May	Air India
22 May - 26 May	Etihad Airways
02 May - 09 May	Etihad Airways
15 May - 13 Jun	Etihad Airways
18 May - 31 May	Air India
31 May - 23 Jun	Air India
03 May - 12 May	IndiGo
29 May - 05 Jun	Air India
01 May - 31 May	IndiGo
16 May - 13 Jun	Air India
16 May - 14 Jun	Etihad Airways
16 May - 12 Jun	IndiGo
25 May - 08 Jun	Qatar Airways
26 May - 09 Jun	Qatar Airways

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

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 May from $662

Return flights