"Thrift Shop" rapper Macklemore is still looking for a come-up ... because Friday morning he caught a flight on America's favorite bargain airline Southwest ... and TMZ has the pic.
Mack -- real name Ben Haggerty -- boarded the discount flight from Burbank to Las Vegas stuntin' in dark shades, a black jacket, and a hoodie ... and he looked incredible.
We're not judging, but it's always pretty incredible to see famous people on Southwest ... guy really lives up to his reputation.
Now THAT'S a cold ass honkey.
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