The cost of traveling to the Hulunbuir Prairie varies from person to person and mainly depends on the following factors: 1. Transportation costs: The transportation methods from Hulunbuir City to the prairie include airplanes, trains, and long-distance buses, and the costs are also different.

2. Accommodation costs: Accommodation conditions on the prairie are relatively simple, usually yurts or tents, and the price ranges from tens to hundreds of yuan.

3. Catering expenses: Catering on the prairie mainly includes barbecue, milk tea, etc., and the prices are relatively low.

4. Ticket prices for attractions: There are many attractions on the prairie, such as Ewenki Customs Park, Aershan National Forest Park, etc., and the ticket prices are also different.

Considering the above factors, you probably need to prepare a travel fee of about 5,000 yuan per person.

Of course, the specific cost depends on individual circumstances.