- Go to the airport (Owning a hanger will stop police gunning you down)
- Wait for the 747 type to land (Haven't tried it with the ones about to take off)
- It will proceed down to the end of the runway once landed, follow it and wait for it to come to a stop at "Hanger 1" (It'll shut it's engines off)
- Simply walk up to the Door, hit Triangle or Y, and vuala!
(Note I refereed to them as 747 type because they don't have a name, they're simply called "Jet" on the vehicle name thing that pops up)