Flies Massive New Jet to Bahamas ...

After Historic Raptors Win

Drake's refueling in the Caribbean before his Raptors take on the Warriors in the NBA Finals -- flying down in his massive new jet ... which is a monster compared to other airliners.

Champagne Papi's new custom "Air Drake" plane was spotted on a landing zone in the Bahamas Sunday, where all its grandeur and OVO swag were on full display as it sized up what appears to be a much smaller Delta-branded model nearby -- maybe a 737-700.

Drake didn't settle for a standard G4 -- he opted for a full-size aircraft, shelling out a ton of cash for a custom 767-300F Boeing plane, which normally seats hundreds of passengers or even cargo loads. The retail price for this type of…