Jason Derulo & Daphne Joy: The Couple That Flies Together ...

Jason Derulo and new gf Daphne Joy are certainly comfortable with each other, walking as one through LAX.

The two touched down on Saturday after a wild weekend celebrating the New Year in Miami. As you can see, Daphne, who has a kid with 50 Cent isn't afraid to pack on a little PDA ... touching Derulo's butt while they wait for their luggage.

You'll remember, Daphne first shot down reports they were banging back in November but it's safe to say those doubts are gone.