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

Return flights

25 Aug - 26 Aug	IndiGo
22 Aug - 25 Aug	IndiGo
17 Aug - 24 Aug	Nepal Airlines
31 Aug - 22 Sep	IndiGo
26 Aug - 22 Sep	Air India
17 Aug - 24 Aug	Turkish Airlines	direct
22 Aug - 25 Aug	Turkish Airlines	direct
31 Aug - 22 Sep	Turkish Airlines	direct
26 Aug - 22 Sep	Turkish Airlines	direct

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

Book a cheap hotel in Istanbul

Cheap car rent in Istanbul

Cheapest return flights from Kathmandu to Istanbul in August from 460€

Return flights