Nimbus

The Nimbus has been seen in the first trailer. It also appeared in GTA Online.

Rockstar has not shared more about the Nimbus yet. This page grows as new trailers and screenshots come out.

More planes and airships

Dodo
Seen in official screenshots. Earlier in games including GTA Vice City, GTA San Andreas and GTA V.
Duster
Seen in the launch trailer. Earlier in GTA V.
Jet
Seen in the second trailer. Earlier in GTA V.
Luxor
Seen in the Extended Look. Earlier in GTA V.
Mammatus
Seen in official artwork. Earlier in GTA V.
Shamal
Seen in official screenshots. Earlier in GTA San Andreas and GTA V.
Mallard
Earlier in GTA V.
Tethered Aerostat Radar System-inspired aircraft
New to the series
Seen in the second trailer.
Twinjet
New to the series