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

Return flights

06 Sep - 13 Sep	Air India
10 Sep - 13 Sep	IndiGo
01 Sep - 06 Sep	IndiGo
09 Sep - 16 Sep	Air India
14 Sep - 27 Sep	IndiGo
10 Sep - 16 Sep	IndiGo
09 Sep - 15 Sep	Air India
05 Sep - 10 Sep	Air India
05 Sep - 14 Sep	Air India
16 Sep - 20 Sep	Nepal Airlines
06 Sep - 04 Oct	Air India
30 Sep - 06 Oct	Nepal Airlines
12 Sep - 15 Oct	Air India
15 Sep - 02 Oct	Air India Express	direct
12 Sep - 02 Oct	Air India Express	direct
23 Sep - 06 Oct	Nepal Airlines
16 Sep - 02 Oct	Air India Express	direct
14 Sep - 02 Oct	Air India Express	direct
27 Sep - 03 Oct	Nepal Airlines
27 Sep - 05 Oct	Nepal Airlines

Also check the deals for one-way flights from Bangalore 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.

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Cheapest return flights from Bangalore to Kathmandu in September from $191

Return flights