1
general::
Phrase(s): luck out
to be fortunate; to strike it lucky. • I really lucked out when I ordered the duck. It’s excellent. • I didn’t luck out at all. I rarely make the right choice.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, luck into. Gain success or something desirable through good fortune. For example, We lucked out and found the same rug for half the price, or Nell and Dave lucked into a terrific apartment. [Colloquial; mid-1900s]
American Heritage Idioms