Limited info provided on your query: 1) Quantify expensive. 2) Date/s of travel.

Dashai ma Jane Nepal. Qatar ko $1500 Cha Emirates ko $2600 (both way ). China ra Europe ko route kasto Cha no idea

Cheapest is via China. I've heard china southern airlines is not bad and depending on the route you can get round ticket under $1000. Also, look for Turkish Airlines. You can save a lot by getting two separate ticket (like flying South West from Dallas to LA and getting TA ticket via LAX).

check multuple times for at lease couple weeks, you should be able to find less than 1100. I bought one for same timing through singapore airlines for 1000 last month. My transit is little long though total time is 34 hrs and 41 hrs for both legs.

this is from dallas.

The difference is 'last month' vs now. Qatar airlines fares have spiked to 1480 from less than 1100 from my city in last 5 weeks.