Not making fun, just making sure the information provided is accurate. According to google maps:
Seaworld entrance is at 7007 Sea Harbor drive, to get to MGV you head northeast on sea harbor drive for .5 miles, 2nd right onto internation drive and go 1.3 miles, turn left onto Avenida Vista and go .6 miles to the MGV located at 5925 Avendia Vista. Add that up and its 2.4 miles which is what we have been saying all along and correct information for the OP to make her decision on.