Dirigibles and blimps.

[Sasuke Uchiha]

So, basically, in verses like Coruscant and Camelot, already exist the use of vehicles that can fly and you would not need the flight power in order to have a flying ship in these verses. Now, when it comes to the other verses, like say the Dunes, they do not have flying vehicle summon ability and the only way to fly in a verse like this is the flight power plus having an assist.

If you have flight and an assist made for your blimp, you may have your blimp anywhere in the Omniverse. Just note that it won't fit though a gate when leaving a verse to the next. I hope this clears it up for you.

Edited to reflect Omni's ruling.