The Oppressor Mk II has the ability to both hover above ground and fly, similar to the Deluxo, as well as operate a large rocket boost like the original Oppressor.

Can the oppressor fly in GTA 5?

The Oppressor MK 2 is so much fun in GTA Online that it's practically a mandatory purchase - a rocket-powered motorbike that allows you to fly effortlessly across Los Santos, equipped with various deadly weapons to harry those poor fools who find themselves stuck at ground level.

Does the oppressor level up flying?

No. It doesn't add to you or your carectors flying skill.