Scott Disick took his new girlfriend across state lines … from New York to Florida.

Scott and 18-year-old Lindsay Vrckovnik¬†were having fun in the sun in Miami Friday, showing skin, nuzzling and soaking in the sights. ¬†Lindsay’s got some nasty bruises on her legs.

They spent a day or so in NYC the day before, where Scott showed Lindsay around.

Kourtney who?