Cheapest return flights from Boston to Kathmandu in September from $731

AirHint found the following cheapest return flights from Boston (BOS) to Kathmandu (KTM) in September 2025 (see full year).

Return flights

02 Sep - 17 Sep Cathay Pacific
08 Sep - 24 Oct Etihad Airways
17 Sep - 02 Oct Etihad Airways
28 Sep - 25 Oct Etihad Airways
26 Sep - 11 Oct Etihad Airways
26 Sep - 23 Oct Etihad Airways
27 Sep - 27 Oct Etihad Airways
22 Sep - 29 Oct Etihad Airways
22 Sep - 13 Oct Etihad Airways
26 Sep - 24 Oct Etihad Airways
27 Sep - 25 Oct Etihad Airways

Also check the deals for one-way flights from Boston to Kathmandu in September.

Skyscanner

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

Feel free to contact us with any feedback or request another flight research.