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

Return flights

15 Aug - 20 Sep	Air Canada
21 Aug - 21 Sep	Cathay Pacific
06 Aug - 10 Sep	Emirates
05 Aug - 10 Sep	Emirates
06 Aug - 08 Sep	Emirates
07 Aug - 10 Sep	Emirates
29 Aug - 07 Sep	Emirates
15 Aug - 27 Sep	Air India
03 Aug - 09 Aug	Air India
01 Aug - 11 Aug	Air India
10 Aug - 20 Aug	Air India
01 Aug - 01 Sep	Air India
15 Aug - 01 Sep	Emirates
01 Aug - 30 Aug	Air India
02 Aug - 29 Aug	Air India
03 Aug - 27 Aug	Air India
09 Aug - 29 Aug	Air India

Also check the deals for one-way flights from Toronto 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 Toronto to Kathmandu in August from 952€

Return flights