Lil Wayne -- Buses to Miami for Heat Opener

Lil Wayne surfaced in his court side seats for the Miami Heat season opener -- despite his recent health crisis -- but as TMZ reported ... he had to trade in his private jet for a luxury bus to make the return trip.

Weezy was in his usual primo seats to see the NBA champs defeat the Boston Celtics on Tuesday night.

Sources close to Wayne tell us he rode a private luxury tour bus from his mother's home in Louisiana back to Miami ... sometime on Monday.

As we told you ... Wayne is under strict orders from his doctors to stay off airplanes in the wake of two mid-air medical emergencies last week -- in which he suffered 2 seizure-like episodes.

We doubt the NBA action was doctor prescribed -- but sitting court side to see LeBron and D-Wade in action can't hurt.