AirHint found the following cheapest return flights from Kolkata (CCU) to Colombo (CMB) in December 2025 (see full year).
Return flights
| 31 Dec - 07 Jan | IndiGo | ||
| 30 Dec - 06 Jan | IndiGo | ||
| 28 Dec - 29 Dec | IndiGo | ||
| 29 Dec - 02 Jan | Air India | ||
| 28 Dec - 04 Jan | Air India |
Also check the deals for one-way flights from Kolkata to Colombo in December.
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