AirHint found the following cheapest return flights from Colombo (CMB) to Kathmandu (KTM) in July 2025 (see full year).

Return flights

17 Jul - 24 Jul	Air India
25 Jul - 30 Jul	Air India
20 Jul - 31 Jul	Air India
17 Jul - 21 Jul	Air India
19 Jul - 26 Jul	Air India
20 Jul - 27 Jul	Air India
31 Jul - 03 Aug	Air India
24 Jul - 21 Aug	SriLankan Airlines	direct
17 Jul - 24 Jul	SriLankan Airlines	direct
31 Jul - 03 Aug	SriLankan Airlines	direct
20 Jul - 31 Jul	SriLankan Airlines	direct
23 Jul - 28 Jul	SriLankan Airlines	direct
17 Jul - 21 Jul	SriLankan Airlines	direct

Also check the deals for one-way flights from Colombo to Kathmandu in July.

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 Kathmandu

Cheap car rent in Kathmandu

Cheapest return flights from Colombo to Kathmandu in July from $361

Return flights