The 19-year-old beauty mogul showed her toned tummy in a black crop and baggy Adidas sweats.
The "Goosebumps" singer opted for an all black ensemble, matching his girlfriend.
Kylie and Travis are inseparable! They even visited a music video shoot with DJ Khaled for his upcoming album, Grateful, together.
What do you think of Kylie and Travis' Miami outing?