How much will gas cost to go from san antonio Kansas City?

It's about 461 miles from San Antonio to Kansas City, according to Google Maps. Assuming you drive a car that gets 35 miles per gallon, you will need about 13.2 gallons of gas to make the trip. At an average gas price of $3.50 per gallon, it will cost about $46.10 to fill up your tank and make the trip.