To travel from the US state of South Dakota to Oklahoma, you would travel south.
The state of Mississippi is 340 miles long (north to south) and 170 miles wide (east to west).
Texas is directly south of Oklahoma and Kansas is directly north of Oklahoma.
Austin TX is practically due south of Oklahoma City OK.
Oklahoma City
648 miles long north to south
South central United States, directly north of the state of Texas and south of Kansas.
Nebraska is bordered by South Dakota to the north and Kansas to the south. Lincoln is the capital city in Nebraska.
That point is in Cherokee County in east Texas. It's a couple hundred feet south of US-79, about 16 miles east of Jacksonville and 16 miles southwest of Henderson.
Kansas is bordered by Nebraska to the north. Kansas also is bordered by Missouri on the east; Oklahoma on the south; and Colorado on the west.
Any state that borders it. No one state is closer to Oklahoma.
Oklahoma is located in the Great Plains of the United States. It is south of Kansas and north of the state of Texas.