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

Return flights

14 Sep - 19 Sep	Air India
25 Sep - 25 Sep	Air India
17 Sep - 20 Sep	Air India
12 Sep - 28 Sep	Air India
25 Sep - 25 Sep	Air India	direct
14 Sep - 21 Sep	Air India
17 Sep - 26 Sep	Air India
16 Sep - 19 Sep	Air India
10 Sep - 21 Sep	Air India
14 Sep - 17 Sep	Air India
30 Sep - 06 Oct	Air India
24 Sep - 01 Oct	Air India
25 Sep - 02 Oct	Air India
17 Sep - 01 Oct	Air India
25 Sep - 01 Oct	Air India
25 Sep - 23 Oct	Air India
15 Sep - 10 Oct	Air India
16 Sep - 01 Oct	Air India	direct
28 Sep - 02 Oct	SriLankan Airlines	direct
17 Sep - 01 Oct	SriLankan Airlines	direct

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.

Book a cheap hotel in Colombo

Cheap car rent in Colombo

Cheapest return flights from Delhi to Colombo in September from 201€

Return flights