AirHint found the following cheapest return flights from Mumbai (BOM) to Kathmandu (KTM) in August 2025 (see full year).

Return flights

21 Aug - 28 Aug	IndiGo
19 Aug - 22 Aug	Air India
17 Aug - 24 Aug	Air India
17 Aug - 20 Aug	Air India
28 Aug - 08 Sep	Air India
28 Aug - 07 Sep	Air India
22 Aug - 30 Aug	IndiGo
17 Aug - 20 Aug	Nepal Airlines	direct
24 Aug - 27 Aug	Air India
19 Aug - 23 Aug	Air India
20 Aug - 22 Aug	Air India
20 Aug - 26 Aug	Air India
30 Aug - 12 Sep	Air India
30 Aug - 19 Sep	Air India
24 Aug - 05 Sep	IndiGo
23 Aug - 02 Sep	IndiGo
30 Aug - 19 Sep	IndiGo	direct
30 Aug - 09 Sep	IndiGo	direct
26 Aug - 10 Sep	IndiGo	direct
23 Aug - 04 Sep	IndiGo

Also check the deals for one-way flights from Mumbai to Kathmandu in August.

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 Mumbai to Kathmandu in August from 133€

Return flights