AirHint found the following cheapest return flights from Houston (IAH) to Kathmandu (KTM) in December 2025 (see full year).

Return flights

06 Dec - 28 Jan	Turkish Airlines
07 Dec - 26 Jan	Turkish Airlines
03 Dec - 26 Jan	Emirates
03 Dec - 25 Jan	Emirates
03 Dec - 25 Dec	Emirates
03 Dec - 26 Dec	Emirates
04 Dec - 26 Dec	Emirates
06 Dec - 25 Dec	Emirates
06 Dec - 26 Dec	Emirates
24 Dec - 26 Jan	Emirates
25 Dec - 17 Jan	Emirates
26 Dec - 17 Jan	Emirates
12 Dec - 28 Jan	Singapore Airlines
25 Dec - 30 Dec	Qatar Airways
10 Dec - 15 Jan	Air Canada
24 Dec - 17 Jan	Emirates
10 Dec - 30 Dec	Lufthansa
10 Dec - 26 Dec	Lufthansa
11 Dec - 31 Dec	WestJet
09 Dec - 31 Dec	IndiGo

Also check the deals for one-way flights from Houston to Kathmandu in December.

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 Houston to Kathmandu in December from $1290

Return flights