Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Rapid City (37% of total searches to South Dakota). The next most popular destinations are Sioux Falls (35%) and Deadwood (20%). Searches for hotels in Keystone (8%) are also popular.
KAYAK users have found double rooms in South Dakota for as cheap as $32 (Hot Springs) in the last 3 days. The average price is $162.
In the last 72 hours, users have found South Dakota hotels for tonight for as low as $60 (Hot Springs). Users have also found 3-star hotels from $99 (Brookings).