AirHint found the following cheapest return flights from Delhi (DEL) to Colombo (CMB) in September 2025 (see full year).

Return flights

15 Sep - 20 Sep	Air India
26 Sep - 05 Oct	Air India
07 Sep - 23 Sep	Air India
04 Sep - 11 Sep	Air India
26 Sep - 05 Oct	Air India	direct
15 Sep - 05 Oct	Air India
07 Sep - 16 Sep	Air India	direct
30 Sep - 14 Oct	Air India	direct
06 Sep - 12 Sep	Air India
07 Sep - 11 Sep	Air India
08 Sep - 12 Sep	Air India
15 Sep - 19 Sep	Air India
06 Sep - 14 Sep	Air India
07 Sep - 12 Sep	Air India
27 Sep - 06 Oct	Air India
30 Sep - 09 Oct	Air India
27 Sep - 05 Oct	Air India
26 Sep - 08 Oct	Air India
27 Sep - 02 Oct	Air India
27 Sep - 04 Oct	Air India

Also check the deals for one-way flights from Delhi to Colombo in September.

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 Delhi to Colombo in September from 203€

Return flights