Kristin Cavallari‘s wasted no time leaning into her new relationship with Mark Estes … in fact, the lovebirds have already wrapped up their first getaway in Cabo together.

Check out these pics … Kristin and her 24-year-old boo were spotted Wednesday rolling their suitcases to the American Airlines priority desk at the airport — and the reality star was rocking a casual matching black set … ME opted for a cozy hoodie.

They’re not really flashing the biggest of smiles here — if anything, you could say it’s kinda the opposite — but it’s probably just the post-vacay blues kicking in … Cabo can do that to ya. Plus, traveling tends to wear folks out … so their mopey moods are nothing to fret.

While their vacay is over … it seems Kristin and Mark are still very much in the honeymoon phase. In fact, on Tuesday, Kristin went full-on IG official with Mark, declaring how happy he makes her in a super cute selfie.

This came shortly after we got photos of them heading on down to Mexico together last Friday … remember, this was supposed to be a business trip for Kristin, but Mark decided to tag along. So, a little work and play, it seems!

Getty/Instagram

We’ve been told Kristin and Mark have been enjoying each other’s company for about a month now — and things are clearly moving along swimmingly between them.

Kristin definitely has a thing for those hot dude model types. She previously dated Tyler Cameron after her marriage to Jay Cutler ended.

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