Zen has a promotion on Qatar where fares have been reduced for travel period between now and March 14, April 1 and 12 June, and 28 Jul -19 September.  Fares are slightly higher between 15 March – 31 March for the spring break, and 20 September - 9 December because of Dashain and Tihar.  Tickets must be purchased by 29 February. Routing  to Nepal is via Houston, Washington, New York…