Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Sioux Falls (75% of total searches to South Dakota). The next most popular destination is Rapid City (25%).
KAYAK users have found double rooms in South Dakota for as cheap as $114 (Sioux Falls) in the last 3 days. The average price is $318.
In the last 72 hours, users have found South Dakota hotels for tonight for as low as $105 (Rapid City). Users have also found 3-star hotels from $114 (Rapid City) and 4-star+ hotels from $271 (Rapid City).