AirHint found the following cheapest return flights from Madras (MAA) to Kathmandu (KTM) in September 2025 (see full year).

Return flights

09 Sep - 17 Sep	Air India
05 Sep - 06 Sep	Air India
07 Sep - 14 Sep	Air India
08 Sep - 09 Sep	Air India
11 Sep - 22 Sep	Air India
10 Sep - 15 Sep	Air India
06 Sep - 13 Sep	Air India
06 Sep - 15 Sep	Air India
05 Sep - 12 Sep	Air India
06 Sep - 11 Sep	Air India
20 Sep - 02 Oct	Air India
18 Sep - 15 Oct	Air India
28 Sep - 04 Oct	IndiGo
29 Sep - 03 Oct	IndiGo
26 Sep - 16 Oct	Air India
26 Sep - 17 Oct	Air India
26 Sep - 12 Oct	Air India
29 Sep - 05 Oct	Air India

Also check the deals for one-way flights from Madras to Kathmandu 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 Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Madras to Kathmandu in September from $249

Return flights