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

Return flights

06 Aug - 06 Aug	Nepal Airlines	direct
01 Aug - 08 Aug	IndiGo	direct
04 Aug - 24 Aug	IndiGo	direct
05 Aug - 11 Aug	IndiGo	direct
16 Aug - 18 Aug	IndiGo	direct
08 Aug - 11 Aug	IndiGo	direct
20 Aug - 27 Aug	IndiGo	direct
02 Aug - 09 Aug	IndiGo	direct
05 Aug - 05 Aug	Nepal Airlines	direct
10 Aug - 17 Aug	IndiGo	direct
25 Aug - 05 Sep	IndiGo	direct
24 Aug - 06 Sep	IndiGo	direct
25 Aug - 07 Sep	SpiceJet	direct
25 Aug - 01 Sep	SpiceJet	direct

Also check the deals for one-way flights from Kathmandu to Delhi 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 Kathmandu to Delhi in August from $152

Return flights